Find the CBSE Class 12 Biology 2025 Sample Paper Set 05 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.
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Section – A
Q. No. 1 to 12 are multiple choice questions. Only one of the choices is correct. Select and writethe correct choice as well as the answer to these questions.
1 Polydactyly (six-fingered hands) is a genetic condition due to a dominant allele (P) over recessive allele (p). If a six- fingered woman and a fivefingered man have a normal child, the genotype of the parents and the child would be:
| Mother | Father | Child | |
| (a) | PP | PP | Pp |
| (b) | Pp | PP | PP |
| (c) | Pp | Pp | PP |
| (d) | PP | Pp | Pp |
Answer : d
2 The microbes used in kitchen are
a) Lactobacillus and yeast
b) Penicillium and yeast
c) Microspora and E.coli
d) Rhizopus and Lactobacillus
Answer : d
3 Which of the following phenomena significantly contributes to speciation?
(P) Natural selection
(Q) Genetic drift
(R) Gene flow
(S) Geographic Isolation
(T) Stabilising Selection
a) Only P,Q and S
b) Only Q and S
c) Only R and T
d) Only Q,R and T
Answer : a
4 A male having abnormal arrangement of chromosome is sterile. He also shows feminine development due to unnatural presence of a Xchromosome.
Mention the chromosomal disorder from which he suffers.
a) Turner’s syndrome
b) Down’s syndrome
c) Haemophilia
d) Klienfelter’s syndrome
Answer : d
5 The hilum in a typical angiospermic ovule represents the junction between
a) Integuments and the embroyo sac
b) Embroyo sac and the nucellus
c) Body of the ovule and the funicle
d) Nucellus and the funicle
Answer : c
6 Given below is a sequence of bases in mRNA of a bacterial cell. Identify the amino acid that would be interpreted at codon position 3 and codon position 5, during the process of its translation.
3’ AUC AGG UUU GUG AUG GUA GGA 5’
a) Phenylalanine, Methionine
b) Cystein, Glycine
c) Alanine, Proline
d) Serine, Valine
Answer : a
7 The organism used in the construction of the first artificial recombinant DNA by Cohen and Boyer in 1972 was
a) E.Coli
b) Salmonella typhimurium
c) Agrobacterium tumefaciens
d) Bacillus thuringiensis
Answer : b
8 What is the smallest part of a DNA molecule that can be changed by a point mutation?
a) Oligonucleotide
b) Codon
c) Gene
d) Nucleotide
Answer : d
9 The amino acid attaches to the tRNA at its
a) 5’ end
b) 3’ end
c) Anticodon site
d) DHU loop
Answer : b
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CBSE Class 12 Biology 2025 Sample Paper Set 05 Solved & Sample Question Papers for Class 12 Biology
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Obtain the CBSE Class 12 Biology 2025 Sample Paper Set 05 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.
Benefits of Practicing Class 12 Biology Sample Papers
- New Question Bank: This set has fresh questions for Biology which are different from previous years.
- Exam Pattern Knowledge: Solving more sets will help you to understand the weightage of each chapter in Class 12 and also the type of questions asked.
- Identify Weak Areas: Comparing your score in each set helps to find out topics in Class 12 Biology for which you need hard work.
- Speed and Accuracy: Attempting MCQ questions and long-form problems for Class 12 Biology makes you faster and better and you will be able to finish your exam on time.
Steps to Follow After Completing CBSE Class 12 Biology 2025 Sample Paper Set 05 Solved
- Solution Matching: Cross-check your steps with expert answers published in our Biology Sample Paper PDF.
- Mistake Correction: Class 12 participants need to isolate error patterns to prevent repeating them in future tests.
- Deep Revision: Re-read sections in the NCERT book for Class 12 Biology to clear doubts before solving items again.
- Extended Preparation: Practice diverse sets of Biology sample materials online to face CBSE exams fearlessly.
FAQs
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Yes, CBSE Class 12 Biology 2025 Sample Paper Set 05 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.
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