Most Important Questions for Class 12 Biology. Try first, then reveal the answer. These are exam-oriented practice items, not copied board papers.
Practice questions aligned to NCERT topics used in CBSE classrooms. These are original exam-oriented questions for revision — not official CBSE board papers and not a guarantee of any exam question. Always match the textbook issued by your school and the latest PDFs on ncert.nic.in and cbseacademic.nic.in.
Answers opened: 0
Practice set
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Sexual Reproduction in Flowering Plants in the chapter Sexual Reproduction in Flowering Plants.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Microsporogenesis and megasporogenesis
C. Endosperm
D. Sexual Reproduction in Flowering Plants is an NCERT chapter taught in CBSE Class 12 Biology
Answer
B. Microsporogenesis and megasporogenesis
Explanation
Microsporogenesis and megasporogenesis. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Sexual Reproduction in Flowering Plants · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Sexual Reproduction in Flowering Plants in the chapter Sexual Reproduction in Flowering Plants.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. Mix MCQs with short answers so you remember both facts and explanations from Sexual Reproduction in Flowering Plants
C. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
D. Pollen–pistil interaction
Answer
D. Pollen–pistil interaction
Explanation
Pollen–pistil interaction. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Sexual Reproduction in Flowering Plants · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Sexual Reproduction in Flowering Plants.
A. This idea is not part of the NCERT chapter
B. CBSE often tests a concept by asking a daily-life example from the same chapter
C. Microsporogenesis and megasporogenesis
D. Write three points from Sexual Reproduction in Flowering Plants in your own words; that is enough for a short-answer start
Answer
B. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Sexual Reproduction in Flowering Plants · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Sexual Reproduction in Flowering Plants.
A. Mix MCQs with short answers so you remember both facts and explanations from Sexual Reproduction in Flowering Plants
B. The textbook says the opposite of this statement
C. Pollen–pistil interaction
D. Double fertilisation
Answer
A. Mix MCQs with short answers so you remember both facts and explanations from Sexual Reproduction in Flowering Plants
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Sexual Reproduction in Flowering Plants. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Sexual Reproduction in Flowering Plants · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Sexual Reproduction in Flowering Plants in the chapter Sexual Reproduction in Flowering Plants.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. Endosperm
C. Apomixis, polyembryony
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
C. Apomixis, polyembryony
Explanation
Apomixis, polyembryony. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Sexual Reproduction in Flowering Plants · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Sexual Reproduction in Flowering Plants in about three points, with one example.
Answer
Double fertilisation. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 12 · Subject: Biology · Chapter: Sexual Reproduction in Flowering Plants · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Human Reproduction in the chapter Human Reproduction.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Human Reproduction is an NCERT chapter taught in CBSE Class 12 Biology
C. Spermatogenesis, oogenesis
D. Fertilisation in ampulla
Answer
C. Spermatogenesis, oogenesis
Explanation
Spermatogenesis, oogenesis. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Reproduction · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Human Reproduction in the chapter Human Reproduction.
A. Mix MCQs with short answers so you remember both facts and explanations from Human Reproduction
B. Parturition outline
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
B. Parturition outline
Explanation
Parturition outline. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Reproduction · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Human Reproduction.
A. This idea is not part of the NCERT chapter
B. Write three points from Human Reproduction in your own words; that is enough for a short-answer start
C. CBSE often tests a concept by asking a daily-life example from the same chapter
D. Spermatogenesis, oogenesis
Answer
C. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Reproduction · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Human Reproduction.
A. Menstrual cycle
B. The textbook says the opposite of this statement
C. Parturition outline
D. Mix MCQs with short answers so you remember both facts and explanations from Human Reproduction
Answer
D. Mix MCQs with short answers so you remember both facts and explanations from Human Reproduction
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Human Reproduction. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Reproduction · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Human Reproduction in the chapter Human Reproduction.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
C. Fertilisation in ampulla
D. Placenta
Answer
D. Placenta
Explanation
Placenta. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Reproduction · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Human Reproduction in about three points, with one example.
Answer
Menstrual cycle. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Reproduction · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Reproductive Health in the chapter Reproductive Health.
A. Contraception methods as in NCERT
B. CBSE often tests a concept by asking a daily-life example from the same chapter
C. Reproductive Health is an NCERT chapter taught in CBSE Class 12 Biology
D. STIs
Answer
A. Contraception methods as in NCERT
Explanation
Contraception methods as in NCERT. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Reproductive Health · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Reproductive Health in the chapter Reproductive Health.
A. Population concerns without stigma
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. Mix MCQs with short answers so you remember both facts and explanations from Reproductive Health
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
A. Population concerns without stigma
Explanation
Population concerns without stigma. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Reproductive Health · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Reproductive Health.
A. Write three points from Reproductive Health in your own words; that is enough for a short-answer start
B. This idea is not part of the NCERT chapter
C. CBSE often tests a concept by asking a daily-life example from the same chapter
D. Contraception methods as in NCERT
Answer
C. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Reproductive Health · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Reproductive Health.
A. MTP legal conditions as in the text
B. The textbook says the opposite of this statement
C. Mix MCQs with short answers so you remember both facts and explanations from Reproductive Health
D. Population concerns without stigma
Answer
C. Mix MCQs with short answers so you remember both facts and explanations from Reproductive Health
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Reproductive Health. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Reproductive Health · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Infertility and ART in the chapter Reproductive Health.
A. STIs
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. Infertility and ART: IVF, ZIFT, GIFT, ICSI as listed
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
C. Infertility and ART: IVF, ZIFT, GIFT, ICSI as listed
Explanation
Infertility and ART: IVF, ZIFT, GIFT, ICSI as listed. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Reproductive Health · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Reproductive Health in about three points, with one example.
Answer
MTP legal conditions as in the text. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 12 · Subject: Biology · Chapter: Reproductive Health · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Principles of Inheritance and Variation in the chapter Principles of Inheritance and Variation.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Laws of inheritance
C. Sex-linked inheritance
D. Principles of Inheritance and Variation is an NCERT chapter taught in CBSE Class 12 Biology
Answer
B. Laws of inheritance
Explanation
Laws of inheritance. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Principles of Inheritance and Variation · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Principles of Inheritance and Variation in the chapter Principles of Inheritance and Variation.
A. Mendelian and chromosomal disorders
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. Mix MCQs with short answers so you remember both facts and explanations from Principles of Inheritance and Variation
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
A. Mendelian and chromosomal disorders
Explanation
Mendelian and chromosomal disorders. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Principles of Inheritance and Variation · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Principles of Inheritance and Variation.
A. Write three points from Principles of Inheritance and Variation in your own words; that is enough for a short-answer start
B. This idea is not part of the NCERT chapter
C. Laws of inheritance
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Principles of Inheritance and Variation · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Principles of Inheritance and Variation.
A. Mendelian and chromosomal disorders
B. The textbook says the opposite of this statement
C. Incomplete dominance, co-dominance
D. Mix MCQs with short answers so you remember both facts and explanations from Principles of Inheritance and Variation
Answer
D. Mix MCQs with short answers so you remember both facts and explanations from Principles of Inheritance and Variation
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Principles of Inheritance and Variation. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Principles of Inheritance and Variation · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Principles of Inheritance and Variation in the chapter Principles of Inheritance and Variation.
A. Sex-linked inheritance
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. Pedigree
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
C. Pedigree
Explanation
Pedigree. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Principles of Inheritance and Variation · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Principles of Inheritance and Variation in about three points, with one example.
Answer
Incomplete dominance, co-dominance. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 12 · Subject: Biology · Chapter: Principles of Inheritance and Variation · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Molecular Basis of Inheritance in the chapter Molecular Basis of Inheritance.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Central dogma
C. DNA as genetic material
D. Molecular Basis of Inheritance is an NCERT chapter taught in CBSE Class 12 Biology
Answer
C. DNA as genetic material
Explanation
DNA as genetic material. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Molecular Basis of Inheritance · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Molecular Basis of Inheritance in the chapter Molecular Basis of Inheritance.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. lac operon
C. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
D. Mix MCQs with short answers so you remember both facts and explanations from Molecular Basis of Inheritance
Answer
B. lac operon
Explanation
lac operon. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Molecular Basis of Inheritance · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Molecular Basis of Inheritance.
A. This idea is not part of the NCERT chapter
B. Write three points from Molecular Basis of Inheritance in your own words; that is enough for a short-answer start
C. CBSE often tests a concept by asking a daily-life example from the same chapter
D. DNA as genetic material
Answer
C. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Molecular Basis of Inheritance · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Molecular Basis of Inheritance.
A. Mix MCQs with short answers so you remember both facts and explanations from Molecular Basis of Inheritance
B. The textbook says the opposite of this statement
C. lac operon
D. Semi-conservative replication
Answer
A. Mix MCQs with short answers so you remember both facts and explanations from Molecular Basis of Inheritance
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Molecular Basis of Inheritance. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Molecular Basis of Inheritance · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Molecular Basis of Inheritance in the chapter Molecular Basis of Inheritance.
A. Genetic code is triplet, degenerate
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
D. Central dogma
Answer
A. Genetic code is triplet, degenerate
Explanation
Genetic code is triplet, degenerate. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Molecular Basis of Inheritance · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Molecular Basis of Inheritance in about three points, with one example.
Answer
Semi-conservative replication. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 12 · Subject: Biology · Chapter: Molecular Basis of Inheritance · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Evolution in the chapter Evolution.
A. Homologous vs analogous
B. CBSE often tests a concept by asking a daily-life example from the same chapter
C. Evolution is an NCERT chapter taught in CBSE Class 12 Biology
D. Hardy–Weinberg
Answer
D. Hardy–Weinberg
Explanation
Hardy–Weinberg. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Evolution · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Evolution in the chapter Evolution.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. Origin of life as in chapter
C. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
D. Mix MCQs with short answers so you remember both facts and explanations from Evolution
Answer
B. Origin of life as in chapter
Explanation
Origin of life as in chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Evolution · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Evolution.
A. This idea is not part of the NCERT chapter
B. Write three points from Evolution in your own words; that is enough for a short-answer start
C. Hardy–Weinberg
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Evolution · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Evolution.
A. Origin of life as in chapter
B. Mix MCQs with short answers so you remember both facts and explanations from Evolution
C. Natural selection types
D. The textbook says the opposite of this statement
Answer
B. Mix MCQs with short answers so you remember both facts and explanations from Evolution
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Evolution. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Evolution · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Evolution in the chapter Evolution.
A. Human evolution outline
B. Homologous vs analogous
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
A. Human evolution outline
Explanation
Human evolution outline. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Evolution · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Evolution in about three points, with one example.
Answer
Natural selection types. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 12 · Subject: Biology · Chapter: Evolution · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Human Health and Disease in the chapter Human Health and Disease.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Innate vs acquired immunity
C. AIDS, malaria, cancer as in NCERT
D. Human Health and Disease is an NCERT chapter taught in CBSE Class 12 Biology
Answer
B. Innate vs acquired immunity
Explanation
Innate vs acquired immunity. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Health and Disease · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Human Health and Disease in the chapter Human Health and Disease.
A. Mix MCQs with short answers so you remember both facts and explanations from Human Health and Disease
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. Vaccination
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
C. Vaccination
Explanation
Vaccination. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Health and Disease · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Human Health and Disease.
A. This idea is not part of the NCERT chapter
B. Write three points from Human Health and Disease in your own words; that is enough for a short-answer start
C. CBSE often tests a concept by asking a daily-life example from the same chapter
D. Innate vs acquired immunity
Answer
C. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Health and Disease · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Human Health and Disease.
A. Mix MCQs with short answers so you remember both facts and explanations from Human Health and Disease
B. The textbook says the opposite of this statement
C. Vaccination
D. Antibodies
Answer
A. Mix MCQs with short answers so you remember both facts and explanations from Human Health and Disease
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Human Health and Disease. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Health and Disease · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Human Health and Disease in the chapter Human Health and Disease.
A. AIDS, malaria, cancer as in NCERT
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
C. Adolescence and drugs
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
C. Adolescence and drugs
Explanation
Adolescence and drugs. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Health and Disease · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Human Health and Disease in about three points, with one example.
Answer
Antibodies. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 12 · Subject: Biology · Chapter: Human Health and Disease · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Household in the chapter Microbes in Human Welfare.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology
C. Household: curd, idli, dough
D. Biogas
Answer
C. Household: curd, idli, dough
Explanation
Household: curd, idli, dough. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Microbes in Human Welfare · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q5MCQ1 markModerateRevision pick
Choose the correct statement related to Microbes in Human Welfare in the chapter Microbes in Human Welfare.
A. Mix MCQs with short answers so you remember both facts and explanations from Microbes in Human Welfare
B. Antibiotics historically
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
B. Antibiotics historically
Explanation
Antibiotics historically. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Microbes in Human Welfare · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q9MCQ1 markEasyRevision pick
Choose the correct statement related to Examples in the chapter Microbes in Human Welfare.
A. Household: curd, idli, dough
B. This idea is not part of the NCERT chapter
C. Write three points from Microbes in Human Welfare in your own words; that is enough for a short-answer start
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Explanation
CBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Microbes in Human Welfare · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q13MCQ1 markEasyRevision pick
Choose the correct statement related to Practice in the chapter Microbes in Human Welfare.
A. Mix MCQs with short answers so you remember both facts and explanations from Microbes in Human Welfare
B. Sewage treatment: BOD
C. The textbook says the opposite of this statement
D. Antibiotics historically
Answer
A. Mix MCQs with short answers so you remember both facts and explanations from Microbes in Human Welfare
Explanation
Mix MCQs with short answers so you remember both facts and explanations from Microbes in Human Welfare. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Microbes in Human Welfare · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q17MCQ1 markEasyRevision pick
Choose the correct statement related to Microbes in Human Welfare in the chapter Microbes in Human Welfare.
A. Biocontrol and biofertilisers
B. Biogas
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
A. Biocontrol and biofertilisers
Explanation
Biocontrol and biofertilisers. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Microbes in Human Welfare · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q413 Mark3 marksModerateRevision pick
Explain Sewage treatment in about three points, with one example.
Answer
Sewage treatment: BOD. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Explanation
Three-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Meta
Class: Class 12 · Subject: Biology · Chapter: Microbes in Human Welfare · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
FAQs
Are these official CBSE board questions?
No. They are original practice questions aligned to NCERT topics used in CBSE classrooms. Official sample papers are published on cbseacademic.nic.in.
Will these questions appear in the board exam?
Nobody can promise a question. Use them for revision of frequently tested concepts and exam-style practice.
Is the chapter list the latest NCERT list?
Yes, the catalog follows current NCERT textbooks used in CBSE schools (including new middle-stage books such as Ganita Prakash and Curiosity). Always match the book issued by your school.
Where are NCERT solutions?
Open the NCERT-style practice link on this subject or chapter. For word-for-word textbook exercise answers, use the NCERT book itself; we do not copy solution keys from other websites.
What is the suggested URL pattern?
Hub /cbse/, then /cbse/class-12/, then subject and chapter slugs.
Why is this a separate URL?
So students searching for “Most Important Questions” land on a filtered set, while the chapter page remains the full 100-question bank. Same facts, different search intent.
Today's 3-step path
Follow this loop every day: mixed test, current affairs, then today's subject. A new set arrives tomorrow.
