Important Formulas 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.
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).
Q2MCQ1 markEasy
Choose the correct statement related to Sexual Reproduction in Flowering Plants in the chapter Sexual Reproduction in Flowering Plants.
A. Double fertilisation
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. Apomixis, polyembryony
Answer
A. Double fertilisation
Explanation
Double fertilisation. 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).
Q3MCQ1 markEasy
Choose the correct statement related to Sexual Reproduction in Flowering Plants in the chapter Sexual Reproduction in Flowering Plants.
A. Endosperm
B. Write three points from Sexual Reproduction in Flowering Plants in your own words; that is enough for a short-answer start
C. Every chapter ends with keywords or a summary that is useful for one-mark answers
D. Pollen–pistil interaction
Answer
A. Endosperm
Explanation
Endosperm. 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).
Q4MCQ1 markEasy
Choose the correct statement related to Sexual Reproduction in Flowering Plants in the chapter Sexual Reproduction in Flowering Plants.
A. Sexual Reproduction in Flowering Plants is an NCERT chapter taught in CBSE Class 12 Biology
B. Use the terms used in the NCERT book; do not replace them with unofficial names
C. Apomixis, polyembryony
D. CBSE often tests a concept by asking a daily-life example from the same chapter
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).
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).
Q2MCQ1 markEasy
Choose the correct statement related to Human Reproduction in the chapter Human Reproduction.
A. Placenta
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. Menstrual cycle
Answer
D. Menstrual cycle
Explanation
Menstrual cycle. 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).
Q3MCQ1 markEasy
Choose the correct statement related to Human Reproduction in the chapter Human Reproduction.
A. Parturition outline
B. Write three points from Human Reproduction in your own words; that is enough for a short-answer start
C. Every chapter ends with keywords or a summary that is useful for one-mark answers
D. Fertilisation in ampulla
Answer
D. Fertilisation in ampulla
Explanation
Fertilisation in ampulla. 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).
Q4MCQ1 markEasy
Choose the correct statement related to Human Reproduction in the chapter Human Reproduction.
A. Use the terms used in the NCERT book; do not replace them with unofficial names
B. Placenta
C. Human Reproduction is an NCERT chapter taught in CBSE Class 12 Biology
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
B. 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).
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).
Q2MCQ1 markEasy
Choose the correct statement related to Reproductive Health in the chapter Reproductive Health.
A. Infertility and ART: IVF, ZIFT, GIFT, ICSI as listed
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. MTP legal conditions as in the text
Answer
D. MTP legal conditions as in the text
Explanation
MTP legal conditions as in the text. 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).
Q3MCQ1 markEasy
Choose the correct statement related to Reproductive Health 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. Every chapter ends with keywords or a summary that is useful for one-mark answers
C. Population concerns without stigma
D. STIs
Answer
D. STIs
Explanation
STIs. 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).
Q4MCQ1 markEasy
Choose the correct statement related to Infertility and ART in the chapter Reproductive Health.
A. Use the terms used in the NCERT book; do not replace them with unofficial names
B. Infertility and ART: IVF, ZIFT, GIFT, ICSI as listed
C. CBSE often tests a concept by asking a daily-life example from the same chapter
D. Reproductive Health is an NCERT chapter taught in CBSE Class 12 Biology
Answer
B. 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).
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).
Q2MCQ1 markEasy
Choose the correct statement related to Principles of Inheritance and Variation in the chapter Principles of Inheritance and Variation.
A. Incomplete dominance, co-dominance
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. Pedigree
Answer
A. Incomplete dominance, co-dominance
Explanation
Incomplete dominance, co-dominance. 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).
Q3MCQ1 markEasy
Choose the correct statement related to Principles of Inheritance and Variation in the chapter Principles of Inheritance and Variation.
A. Every chapter ends with keywords or a summary that is useful for one-mark answers
B. Mendelian and chromosomal disorders
C. Write three points from Principles of Inheritance and Variation in your own words; that is enough for a short-answer start
D. Sex-linked inheritance
Answer
D. Sex-linked inheritance
Explanation
Sex-linked 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).
Q4MCQ1 markEasy
Choose the correct statement related to Principles of Inheritance and Variation in the chapter Principles of Inheritance and Variation.
A. Pedigree
B. Use the terms used in the NCERT book; do not replace them with unofficial names
C. Principles of Inheritance and Variation is an NCERT chapter taught in CBSE Class 12 Biology
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
A. 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).
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).
Q2MCQ1 markEasy
Choose the correct statement related to Molecular Basis of Inheritance in the chapter Molecular Basis of Inheritance.
A. Semi-conservative replication
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. Genetic code is triplet, degenerate
Answer
A. Semi-conservative replication
Explanation
Semi-conservative replication. 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).
Q3MCQ1 markEasy
Choose the correct statement related to Molecular Basis of Inheritance in the chapter Molecular Basis of Inheritance.
A. lac operon
B. Every chapter ends with keywords or a summary that is useful for one-mark answers
C. Central dogma
D. Write three points from Molecular Basis of Inheritance in your own words; that is enough for a short-answer start
Answer
C. Central dogma
Explanation
Central dogma. 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).
Q4MCQ1 markEasy
Choose the correct statement related to Molecular Basis of Inheritance in the chapter Molecular Basis of Inheritance.
A. Molecular Basis of Inheritance is an NCERT chapter taught in CBSE Class 12 Biology
B. Use the terms used in the NCERT book; do not replace them with unofficial names
C. Genetic code is triplet, degenerate
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
C. 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).
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).
Q2MCQ1 markEasy
Choose the correct statement related to Evolution in the chapter Evolution.
A. Human evolution outline
B. Natural selection types
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. Natural selection types
Explanation
Natural selection types. 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).
Q3MCQ1 markEasy
Choose the correct statement related to Evolution in the chapter Evolution.
A. Homologous vs analogous
B. Every chapter ends with keywords or a summary that is useful for one-mark answers
C. Origin of life as in chapter
D. Write three points from Evolution in your own words; that is enough for a short-answer start
Answer
A. Homologous vs analogous
Explanation
Homologous vs analogous. 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).
Q4MCQ1 markEasy
Choose the correct statement related to Evolution in the chapter Evolution.
A. Human evolution outline
B. Evolution is an NCERT chapter taught in CBSE Class 12 Biology
C. Use the terms used in the NCERT book; do not replace them with unofficial names
D. CBSE often tests a concept by asking a daily-life example from the same chapter
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).
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).
Q2MCQ1 markEasy
Choose the correct statement related to Human Health and Disease in the chapter Human Health and Disease.
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. Antibodies
D. Adolescence and drugs
Answer
C. Antibodies
Explanation
Antibodies. 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).
Q3MCQ1 markEasy
Choose the correct statement related to Human Health and Disease in the chapter Human Health and Disease.
A. Write three points from Human Health and Disease in your own words; that is enough for a short-answer start
B. Every chapter ends with keywords or a summary that is useful for one-mark answers
C. Vaccination
D. AIDS, malaria, cancer as in NCERT
Answer
D. AIDS, malaria, cancer as in NCERT
Explanation
AIDS, malaria, cancer as in NCERT. 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).
Q4MCQ1 markEasy
Choose the correct statement related to Human Health and Disease in the chapter Human Health and Disease.
A. Use the terms used in the NCERT book; do not replace them with unofficial names
B. Human Health and Disease is an NCERT chapter taught in CBSE Class 12 Biology
C. CBSE often tests a concept by asking a daily-life example from the same chapter
D. Adolescence and drugs
Answer
D. 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).
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).
Q2MCQ1 markEasy
Choose the correct statement related to Sewage treatment in the chapter Microbes in Human Welfare.
A. Biocontrol and biofertilisers
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. Sewage treatment: BOD
Answer
D. Sewage treatment: BOD
Explanation
Sewage treatment: BOD. 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).
Q3MCQ1 markEasy
Choose the correct statement related to Microbes in Human Welfare in the chapter Microbes in Human Welfare.
A. Every chapter ends with keywords or a summary that is useful for one-mark answers
B. Write three points from Microbes in Human Welfare in your own words; that is enough for a short-answer start
C. Antibiotics historically
D. Biogas
Answer
D. Biogas
Explanation
Biogas. 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).
Q4MCQ1 markEasy
Choose the correct statement related to Microbes in Human Welfare in the chapter Microbes in Human Welfare.
A. Use the terms used in the NCERT book; do not replace them with unofficial names
B. Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology
C. Biocontrol and biofertilisers
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
C. 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).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Biotechnology: Principles and Processes in the chapter Biotechnology: Principles and Processes.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Restriction enzymes
C. PCR
D. Biotechnology: Principles and Processes is an NCERT chapter taught in CBSE Class 12 Biology
Answer
B. Restriction enzymes
Explanation
Restriction enzymes. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Biotechnology: Principles and Processes · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q2MCQ1 markEasy
Choose the correct statement related to Biotechnology: Principles and Processes in the chapter Biotechnology: Principles and Processes.
A. Gel electrophoresis
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. Vectors: plasmid
Answer
A. Gel electrophoresis
Explanation
Gel electrophoresis. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Biotechnology: Principles and Processes · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q3MCQ1 markEasy
Choose the correct statement related to Biotechnology: Principles and Processes in the chapter Biotechnology: Principles and Processes.
A. Write three points from Biotechnology: Principles and Processes in your own words; that is enough for a short-answer start
B. PCR
C. Every chapter ends with keywords or a summary that is useful for one-mark answers
D. Bioreactor
Answer
B. PCR
Explanation
PCR. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Biotechnology: Principles and Processes · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q4MCQ1 markEasy
Choose the correct statement related to Vectors in the chapter Biotechnology: Principles and Processes.
A. Use the terms used in the NCERT book; do not replace them with unofficial names
B. Biotechnology: Principles and Processes is an NCERT chapter taught in CBSE Class 12 Biology
C. Vectors: plasmid
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
C. Vectors: plasmid
Explanation
Vectors: plasmid. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Biotechnology: Principles and Processes · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Biotechnology and its Applications in the chapter Biotechnology and its Applications.
A. Biotechnology and its Applications is an NCERT chapter taught in CBSE Class 12 Biology
B. CBSE often tests a concept by asking a daily-life example from the same chapter
C. Gene therapy idea
D. Bt cotton
Answer
D. Bt cotton
Explanation
Bt cotton. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Biotechnology and its Applications · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q2MCQ1 markEasy
Choose the correct statement related to Biotechnology and its Applications in the chapter Biotechnology and its Applications.
A. Humulin
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. RNA interference
Answer
A. Humulin
Explanation
Humulin. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Biotechnology and its Applications · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q3MCQ1 markEasy
Choose the correct statement related to Biotechnology and its Applications in the chapter Biotechnology and its Applications.
A. Ethical issues and biopiracy
B. Every chapter ends with keywords or a summary that is useful for one-mark answers
C. Write three points from Biotechnology and its Applications in your own words; that is enough for a short-answer start
D. Gene therapy idea
Answer
D. Gene therapy idea
Explanation
Gene therapy idea. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Biotechnology and its Applications · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q4MCQ1 markEasy
Choose the correct statement related to Biotechnology and its Applications in the chapter Biotechnology and its Applications.
A. Biotechnology and its Applications is an NCERT chapter taught in CBSE Class 12 Biology
B. Use the terms used in the NCERT book; do not replace them with unofficial names
C. CBSE often tests a concept by asking a daily-life example from the same chapter
D. RNA interference
Answer
D. RNA interference
Explanation
RNA interference. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Biotechnology and its Applications · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Organisms and Populations in the chapter Organisms and Populations.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Organisms and Populations is an NCERT chapter taught in CBSE Class 12 Biology
C. Major biomes as in remaining text
D. Interactions: predation, competition, mutualism
Answer
C. Major biomes as in remaining text
Explanation
Major biomes as in remaining text. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Organisms and Populations · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q2MCQ1 markEasy
Choose the correct statement related to Organisms and Populations in the chapter Organisms and Populations.
A. Population growth models
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. Age pyramids
Answer
A. Population growth models
Explanation
Population growth models. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Organisms and Populations · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q3MCQ1 markEasy
Choose the correct statement related to Interactions in the chapter Organisms and Populations.
A. Write three points from Organisms and Populations in your own words; that is enough for a short-answer start
B. Carrying capacity
C. Every chapter ends with keywords or a summary that is useful for one-mark answers
D. Interactions: predation, competition, mutualism
Answer
D. Interactions: predation, competition, mutualism
Explanation
Interactions: predation, competition, mutualism. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Organisms and Populations · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q4MCQ1 markEasy
Choose the correct statement related to Organisms and Populations in the chapter Organisms and Populations.
A. Organisms and Populations is an NCERT chapter taught in CBSE Class 12 Biology
B. Use the terms used in the NCERT book; do not replace them with unofficial names
C. Age pyramids
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
C. Age pyramids
Explanation
Age pyramids. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Organisms and Populations · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q1MCQ1 markEasyRevision pick
Choose the correct statement related to Ecosystem in the chapter Ecosystem.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
B. Pyramids of number, biomass, energy
C. Ecosystem is an NCERT chapter taught in CBSE Class 12 Biology
D. GPP, NPP
Answer
D. GPP, NPP
Explanation
GPP, NPP. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Ecosystem · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q2MCQ1 markEasy
Choose the correct statement related to Ecosystem in the chapter Ecosystem.
A. 10% law
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. Nutrient cycling: carbon, phosphorus
Answer
A. 10% law
Explanation
10% law. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Ecosystem · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q3MCQ1 markEasy
Choose the correct statement related to Ecosystem in the chapter Ecosystem.
A. Ecological succession if retained
B. Pyramids of number, biomass, energy
C. Every chapter ends with keywords or a summary that is useful for one-mark answers
D. Write three points from Ecosystem in your own words; that is enough for a short-answer start
Answer
B. Pyramids of number, biomass, energy
Explanation
Pyramids of number, biomass, energy. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Ecosystem · Original GKSchools practice (NCERT-aligned, not an official CBSE paper).
Q4MCQ1 markEasy
Choose the correct statement related to Nutrient cycling in the chapter Ecosystem.
A. Nutrient cycling: carbon, phosphorus
B. Ecosystem is an NCERT chapter taught in CBSE Class 12 Biology
C. Use the terms used in the NCERT book; do not replace them with unofficial names
D. CBSE often tests a concept by asking a daily-life example from the same chapter
Answer
A. Nutrient cycling: carbon, phosphorus
Explanation
Nutrient cycling: carbon, phosphorus. The other options mix ideas from nearby topics or reverse the textbook fact.
Meta
Class: Class 12 · Subject: Biology · Chapter: Ecosystem · 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 “Important Formulas” 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.
