Find the CBSE Class 12 Biology 2025 Sample Paper Set 06 Solved right below. We offer standard Class 12 Biology sample papers packed with detailed solutions for the 2026-27 term, following rules set by CBSE, NCERT, and KVS. Practice these model tests to build confidence and understand fresh marking trends.
Solved Sample Paper for Class 12 Biology PDF
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Biology Sample Papers for Class 12 (2026-27)
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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Obtain the CBSE Class 12 Biology 2025 Sample Paper Set 06 Solved directly from our site to boost your exam readiness. Learning the precise blueprint behind question creation is essential for Class 12 learners aiming for high grades. Working through these latest Biology model sets exposes you to likely exam questions. Utilize the PDF format download for offline study, simulating real exam constraints at home.
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- Solution Matching: Cross-check your steps with expert answers published in our Biology Sample Paper PDF.
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