Download CBSE Class 12 Biology Sample Papers
Explore authentic exam practice materials through the CBSE Class 12 Biology 2025 Sample Paper Set 06 Solved. Tailored for Class 12 learners, utilizing these Biology sample papers ensures thorough preparation and strengthens time management skills before final CBSE evaluations.
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SECTION-A
1. Genotype ratio of 1:2:1 is obtained in a cross between
A) AB *AB
B) Ab * Ab
C) Ab * ab
D) Ab * ab
Answer : b
2. Match the items of column I with those of column II.
| Column I | Column II |
| A. Copper-releasing IUD | 1. Sterilization in males. |
| B. Hormone- releasing IUD | 2. Progesterone – estrogen combination. |
| C. Vasectomy | 3. Progestasert. |
| D. Oral contraceptive | 4. Multiload 375. |
a) A – 1, B -2 , C-3 , D-4
b) A – 2, B -1 , C-4 , D-3
c) A – 4, B -3 , C-1 , D-2
d) A – 3,B -2 , C-4, D-1
Answer : c
3. In E.coli , the lac operon gets switched on when
a) Lactose is present and it binds to the repressor.
b) Repressor binds to operator.
c) RNA polymerase binds to the operator.
d) Lactose is present and its binds to RNA polymerase.
Answer : a
4. SL Miller in his set up demonstrated chemical evolution by the appearance of which of the following molecules?
a. Amino acid
b. Organic acid
c. Peptide acid
d. All of these
Answer : d
5. The substance produced by a cell on viral infection that can protect other cells from further infection is
a) Serotonin
b) Colostrum
c) Interferon
d) Histamine
Answer : c
6. A DNA molecule is 160 base pairs long. If it has 20 % adenine, how many cytosine base pairs are present in this DNA molecule?
a. 40
b. 60
c. 80
d. 20
Answer : b
7. Which amino acids are present in histone proteins?
a) Lysine and histidine
b) Valine and histidine
c) Arginine and lysine
d) Arginine and histidine
Answer : c
8. Plasmids in bacterial cells are
a) Extra –chromosomal DNA, which cannot replicate.
b) Extra- chromosomal DNA, which can self-replicate.
c) Extra DNA associated with the genome.
d) Extra DNA , associated with the genome, but cannot replicate.
Answer : b
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Class 12 Biology CBSE Class 12 Biology 2025 Sample Paper Set 06 Solved PDF Download Guide
Explore downloadable sample sets for Class 12 Biology. Utilizing the CBSE Class 12 Biology 2025 Sample Paper Set 06 Solved allows learners to gauge exam readiness and master official CBSE assessment structures.
Key Advantages of Solving CBSE Class 12 Biology 2025 Sample Paper Set 06 Solved
- Original Practice Material: Access unique questions for Biology designed to challenge your understanding.
- Self-Assessment: Evaluate scores per set to pinpoint weak zones in Class 12 Biology.
- Exam Completion Skills: Routine problem sets train you to manage test duration efficiently without stress.
How to Analyze Your Performance in CBSE Class 12 Biology 2025 Sample Paper Set 06 Solved
- Verify Answers: Compare your responses against professional teacher solutions provided in the sample paper keys.
- Error Analysis: Class 12 learners must review incorrect answers carefully to understand underlying mistakes.
- Concept Reinforcement: Consult the official NCERT book for Class 12 Biology when stuck before re-attempting problems.
FAQs
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Yes, CBSE Class 12 Biology 2025 Sample Paper Set 06 Solved comes with detailed, teacher-verified solutions. We have provided step-by-step answers for Biology to help students of Class 12 understand correct methodology and marking scheme.
Practicing this Biology paper helps in time management and identifying important topics. For Class 12, solving mock papers is the best way to gain confidence and reduce exam-day anxiety.
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