Class XII Biology Sample Question Paper 2024-25

Class XII Biology Sample Question Paper 2024-25

The Class XII Biology Sample Question Paper for the academic year 2024-25 is designed to help students prepare for their examinations. It includes a variety of question types, including multiple-choice questions, assertion-reason questions, and case-based questions, covering key topics in biology. This resource is essential for students aiming to excel in their biology exams, providing a comprehensive review of the syllabus. The paper consists of 33 questions divided into five sections, ensuring a thorough assessment of students' understanding of biological concepts.

Key Points

  • Includes 33 questions across five sections for comprehensive exam preparation
  • Covers key biology topics such as genetics, ecology, and human physiology
  • Features multiple-choice, assertion-reason, and case-based questions
  • Designed for Class XII students preparing for their biology examinations
  • Varnika
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Sample Question Paper
Class XII
044 Biology (2024-25)
Maximum Marks: 70 Time: 3 hours
General Instructions:
(i) All questions are compulsory.
(ii) The question paper has five sections and 33 questions.
(iii) Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2
marks each; Section– C has 7 questions of 3 marks each; Section– D has 2
case-based questions of 4 marks each; and Section–E has 3 questions of 5
marks each.
(iv) There is no overall choice. However, internal choices have been provided in
some questions. A student has to attempt only one of the alternatives in such
questions.
(v) Wherever necessary, neat and properly labeled diagrams should be drawn.
Section – A
Q. No. 1 to 12 are multiple choice questions. Only one of the choices is correct.
Select and write the correct choice as well as the answer to these questions.
Q.
No
Question
Mark
s
1
Signals for parturition in human female originate from
A. Fully developed foetus only
B. Both placenta as well as fully developed foetus
C. Placenta only
D. Oxytocin released from maternal pituitary
1
2
To produce 1600 seeds, the number of meiotic divisions required will be
A. 2400
B. 2000
C. 1600
D. 1800
1
3
A sample of normal double-stranded DNA was found to have thymine
content of 27%. What will be the expected proportion of guanine in this
strand?
A. 23%
B. 32%
C. 36%
D. 73%
1
4
Observe the schematic diagram that depicts a small section of nucleic
acid. The bases in two strands are paired through hydrogen bonds that
are shown by the dark lines. Identify the correct sequence of nucleotide
in the 5’-3’ direction.
A. GCAT
B. CGTA
C. TAGC
D. ATCG
- - - - - - - - - - - - - - - - - - -
For Visual Impaired Students
E. coli has 4.6 X 10
6
base pairs and completes the process of replication
in 18 minutes, then the average rate of polymerization is approximately
A. 2000 bp/s
B. 4000 bp/s
C. 3000 bp/s
D. 1000 bp/s
1
5
Suresh and Rajesh have defective haemoglobin due to genetic disorders.
In Suresh, the problem is qualitative as he is having incorrectly functioning
globin molecules while in Rajesh the problem is quantitative as he is
having very few globin molecules. Identify the disorder they are suffering
from.
Suresh
A
Thalassemia - Autosomal
Dominant blood disorder
B
Sickle Cell Anaemia -
Autosomal linked Dominant
trait
C
Sickle Cell Anaemia –
Autosomal linked Recessive
trait
D
Thalassemia - Autosomal
Dominant blood disorder
1
6
In E.coli, the lac operon gets switched on when lactose is
A. present in the medium and it binds to the repressor.
B. not present in the medium and the repressor binds to the operator.
C. not present in the medium and RNA polymerase binds to the
operator.
D. Active lactose present in the medium binds to RNA polymerase.
1
7
Which of the following features shows the mechanism of sex
determination in honey-bee?
(i) An offspring formed from the union of a sperm and egg develops
as a female.
(ii) Males have half the number of chromosomes than that of female.
(iii) The males are haploid having 32 chromosomes.
(iv) All workers and males are diploid having 16 chromosomes
A. (i) and (ii)
B. (ii) and (iii)
C. (i) and (iv)
D. (ii) and (iv)
1
8
The following diagram shows a fragment of DNA which is going to be
transcribed, the upper strand with polarity 3’ to 5’ is the template strand:
3´ ATTGCC 5´
5´ TAACGG 3´
After transcription the mRNA can be represented by:
A. 5´ AUUGCC 3´
B. 5´ AUUGCC 3’
C. 5´ UAACGG 3´
D. 5´ GGCAAU 3´
1
9
Idli – dosa dough rises due to production of which of the following gas?
A. CO
B. CO
2
C. NO
D. NO
2
1
10
Adaptive radiation leads to which of the following?
A. Increased competition among species
B. Decreased speciation rates
C. Limited morphological diversity among species
D. Rapid divergence of traits among populations inhabiting a given
geographical area.
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End of Document
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FAQs of Class XII Biology Sample Question Paper 2024-25

What types of questions are included in the Class XII Biology Sample Paper?
The Class XII Biology Sample Question Paper includes a variety of question types such as multiple-choice questions, assertion-reason questions, and case-based questions. This diverse format allows students to engage with the material in different ways, testing their knowledge and understanding of key biological concepts. Each section is designed to assess different levels of comprehension, from basic recall to application and analysis.
How is the Class XII Biology Sample Question Paper structured?
The sample question paper is structured into five sections, comprising a total of 33 questions. Section A contains 16 multiple-choice questions, Section B includes 5 questions worth 2 marks each, Section C has 7 questions worth 3 marks each, Section D features 2 case-based questions worth 4 marks each, and Section E concludes with 3 questions worth 5 marks each. This structure ensures a balanced assessment of students' knowledge across various topics.
What topics are covered in the Class XII Biology Sample Question Paper?
The sample question paper covers a wide range of topics relevant to the Class XII biology syllabus, including genetics, evolution, human physiology, and ecology. Specific questions may address concepts such as meiotic divisions, the structure of DNA, and the mechanisms of gene expression. This comprehensive coverage is designed to prepare students for their final examinations by reinforcing their understanding of essential biological principles.
Who is the target audience for the Class XII Biology Sample Question Paper?
The target audience for the Class XII Biology Sample Question Paper includes students enrolled in the Class XII biology curriculum, particularly those preparing for their board examinations. It is also a valuable resource for educators seeking to assess student understanding and readiness for exams. By utilizing this sample paper, students can familiarize themselves with the exam format and question types they will encounter.
What is the significance of practicing with the Class XII Biology Sample Question Paper?
Practicing with the Class XII Biology Sample Question Paper is significant for students as it helps them identify their strengths and weaknesses in various biology topics. It provides an opportunity to apply theoretical knowledge in a practical exam format, enhancing test-taking skills and time management. Regular practice with such sample papers can lead to improved performance in actual examinations.

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