Class 12 Biology Microbes in Human Welfare MCQ Questions
MCQ Questions for Class 12 Biology Microbes in Human Welfare. 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 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).
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).
Q6MCQ1 markEasy
Choose the correct statement related to Microbes in Human Welfare in the chapter Microbes in Human Welfare.
A. Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology
B. Biocontrol and biofertilisers
C. Write three points from Microbes in Human Welfare in your own words; that is enough for a short-answer start
D. Every chapter ends with keywords or a summary that is useful for one-mark answers
Answer
A. Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology
Explanation
Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology. 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).
Q7MCQ1 markEasy
Choose the correct statement related to Textbook first in the chapter Microbes in Human Welfare.
A. The textbook says the opposite of this statement
B. CBSE often tests a concept by asking a daily-life example from the same chapter
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
D. Use the terms used in the NCERT book; do not replace them with unofficial names
Answer
C. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
Explanation
Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions. 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).
Q8MCQ1 markEasy
Choose the correct statement related to Keywords 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. This happens only in a laboratory and never in daily life
C. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
D. Every chapter ends with keywords or a summary that is useful for one-mark answers
Answer
D. Every chapter ends with keywords or a summary that is useful for one-mark answers
Explanation
Every chapter ends with keywords or a summary that is useful for one-mark answers. 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).
Q10MCQ1 markModerate
Choose the correct statement related to Diagrams in the chapter Microbes in Human Welfare.
A. Use the terms used in the NCERT book; do not replace them with unofficial names
B. The textbook says the opposite of this statement
C. Sewage treatment: BOD
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Explanation
If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures. 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).
Q11MCQ1 markEasy
Choose the correct statement related to Revision 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. This happens only in a laboratory and never in daily life
C. Biogas
D. Write three points from Microbes in Human Welfare in your own words; that is enough for a short-answer start
Answer
D. Write three points from Microbes in Human Welfare in your own words; that is enough for a short-answer start
Explanation
Write three points from Microbes in Human Welfare in your own words; that is enough for a short-answer start. 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).
Q12MCQ1 markEasy
Choose the correct statement related to Accuracy in the chapter Microbes in Human Welfare.
A. This idea is not part of the NCERT chapter
B. Biocontrol and biofertilisers
C. Use the terms used in the NCERT book; do not replace them with unofficial names
D. Household: curd, idli, dough
Answer
C. Use the terms used in the NCERT book; do not replace them with unofficial names
Explanation
Use the terms used in the NCERT book; do not replace them with unofficial names. 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).
Q14MCQ1 markEasy
Choose the correct statement related to Household in the chapter Microbes in Human Welfare.
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
B. Biocontrol and biofertilisers
C. This happens only in a laboratory and never in daily life
D. Household: curd, idli, dough
Answer
D. 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).
Q15MCQ1 markModerate
Choose the correct statement related to Sewage treatment in the chapter Microbes in Human Welfare.
A. Every chapter ends with keywords or a summary that is useful for one-mark answers
B. Household: curd, idli, dough
C. Antibiotics historically
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).
Q16MCQ1 markEasy
Choose the correct statement related to Microbes in Human Welfare in the chapter Microbes in Human Welfare.
A. Biogas
B. CBSE often tests a concept by asking a daily-life example from the same chapter
C. Sewage treatment: BOD
D. Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology
Answer
A. 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).
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).
Q18MCQ1 markEasy
Choose the correct statement related to Microbes in Human Welfare in the chapter Microbes in Human Welfare.
A. Biocontrol and biofertilisers
B. Antibiotics historically
C. Every chapter ends with keywords or a summary that is useful for one-mark answers
D. Write three points from Microbes in Human Welfare in your own words; that is enough for a short-answer start
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).
Q19MCQ1 markEasy
Choose the correct statement related to Microbes in Human Welfare in the chapter Microbes in Human Welfare.
A. Antibiotics historically
B. Sewage treatment: BOD
C. This topic is only for college
D. Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology
Answer
D. Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology
Explanation
Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology. 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).
Q20MCQ1 markModerate
Choose the correct statement related to Textbook first in the chapter Microbes in Human Welfare.
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 Microbes in Human Welfare
C. Microbes in Human Welfare is an NCERT chapter taught in CBSE Class 12 Biology
D. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
Answer
A. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
Explanation
Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions. 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).
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.
How should I use the 100 questions?
Try the question first, then tap Show answer. Mix MCQs with long answers. Revise formulas and diagrams from the textbook alongside this set.
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 “MCQ 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.
