CBSE Class 12 Biology Sample Papers 2024-25 for Board exam
CBSE Class 12 Biology sample paper for the 2024-25 board exam have been officially released, providing students with a valuable resource for their preparation. These sample papers are designed to help students understand the CBSE Class 12 exam format, types of questions and marking scheme. By practicing with these papers, students can identify important topics, enhance their time management skills and build confidence for the actual exam. Overall, working through the Class 12 Biology sample papers is an effective way to strengthen one's grasp of the material and perform better in the upcoming board exams.
Biology Sample Paper Class 12 2024-25
The Biology Sample Paper for Class 12 for the 2024 academic year is an important resource for students preparing for their board exams. This sample paper is based on the latest syllabus and exam pattern set by the CBSE. It includes a variety of question types, such as multiple-choice, short answer and long answer questions covering all key topics in the curriculum.
Students are advised to use this CBSE Class 12 sample paper to practice and familiarize themselves with the exam format, helping them identify areas where they may need further study. Working through the sample paper can boost confidence and improve time management skills for the actual exam. By focusing on this practice material, students can strengthen their grasp of biological concepts and enhance their overall exam readiness.
Biology Model Question Paper 2024-25 with Answers PDF
The CBSE Class 12 Biology sample paper for 2024-25, along with official solutions and the marking scheme, is now available in PDF format. These resources are important for students preparing for the 2024-25 board exam, as they provide valuable insights into the exam pattern and help reinforce key concepts.
Download CBSE Class 12 Biology Sample Paper 2024-25 PDF
Download CBSE Class 12 Biology Sample Paper Solutions and Marking Scheme 2024-25
Sample Paper Biology Class 12 2024-25
The Class 12 Biology sample paper for 2024-25 has been designed to help students prepare effectively for their board exams. Below are the types of questions in the sample paper:
Q) 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
Q) To produce 1600 seeds, the number of meiotic divisions required will be
A. 2400
B. 2000
C. 1600
D. 1800
Q) 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%
Q) 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.
Q) 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)
Q) 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´
Q) Idli – dosa dough rises due to production of which of the following gas?
A. CO
B. CO2
C. NO
D. NO2
Q) 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.
Q) During the secondary treatment of sewage, which of the following change in the effluent occur due to flocs?
A. Reduction in BOD
B. Increase in BOD
C. Decrease in DO
D. No change in DO or BOD
Q) (i) A blood test reported negative for hCG. What does negative hCG imply? Name the tissue which produces hCG?
(ii) If a blood test reported positive for hCG in a person, then which other hormones would also be secreted by the tissue secreting hCG?
Q) (i) The human male ejaculates about 200 to 300 million sperm during a coitus, however the ovum is fertilized by only one sperm. How does the ovum block the entry of additional sperms?
(ii) All copulations will not lead to fertilization. Why?
Q) A culture plate of Lactobacillus shows blue-coloured colonies and colourless colonies. Explain the principle involved in the formation of such variance in the colour of colonies.
Q) (i) It was estimated that if an evergreen forest has a GPP of 400J/m²/day and 150 J/m²/day worth of carbon dioxide flows out of that forest, what is the NPP in that forest?
(ii) Explain why pyramids of energy must always be upright.
Q) Each Mango fruit contains one seed. Two mango seeds, X and Y were sown in the soil. From Seed X, 3 plant saplings germinated but from seed Y only 1 plant sapling germinated.
A. For seed X which is apomictic, calculate the number of:
i) Embryo(s)
ii) Embryo sac(s)
iii) Ovules in this seed’s ovary
B. How multiples embryos are formed in citrus fruits?
C. What advantage will plants developed from seed Y have over seed X?
Q) Name the place in human ovary where the first meiotic division is completed during oogenesis. What are the products of this division? Give the chromosome number of each type of cells involved in the process.
Q) Describe the steps involved in Southern blot hybridization using radiolabeled VNTR as a probe.
Q) Bio-fertilisers are organisms that enrich the nutrient quality in the soil. Explain the role of three main sources of bio-fertilisers.
Q) Explain how PCR technique can be used for amplification of a small amount of DNA template.
How to Download Class 12 Bio Sample Paper
To download the Class 12 Biology sample paper for the upcoming board exams, follow these simple steps:
Visit the Official CBSE Website: Go to the official CBSE academic website at cbseacademic.nic.in.
Navigate to Sample Papers: Look for the "Sample Question Papers" section. This is usually found under the "Academic" or "Examinations" tab.
Select Class 12: Choose the Class 12 option from the available list of grades.
Find Biology Sample Paper: Scroll through the list of subjects to locate the Biology sample paper for the academic year 2024-25.
Download the PDF: Click on the download link for the Biology sample paper. The PDF will open in a new tab or prompt you to save it to your device.
Check Marking Scheme: If available, you can also download the marking scheme by following a similar process.
Advantages of Solving Biology Sample Paper Class 12 with Solution
Practicing the Class 12 Biology sample paper from the CBSE board provides several advantages that can significantly enhance students performance in the upcoming 2024-25 board exams. Here are some key benefits:
Understanding the Exam Pattern: Students will gain insights into the marking scheme and structure of the Class 12 Biology board exam, helping them know how marks are allocated.
Identifying Key Questions: Reviewing the sample papers can help students pinpoint important topics and commonly asked questions, allowing them to focus their study efforts effectively.
Improving Grades: Regular practice with sample papers often leads to higher scores in the CBSE Board Exam for Class 12 Biology, as it reinforces knowledge and exam strategies.
Assessing Readiness: Working through the sample paper allows students to evaluate their preparedness for the board exam, highlighting areas that need further review or practice.
Read More: CBSE Sample Papers for Class 12 Board Exam 2024-25
CBSE Class 12 Biology Sample Paper 2024-25 for Board exam FAQs
What are CBSE Class 12 Biology Sample Papers?
These are practice papers created by the CBSE to help students prepare for their Class 12 Biology board exams. They reflect the exam pattern, marking scheme, and types of questions expected in the actual exam.
Are the sample papers similar to the actual exam?
Yes, the questions in the sample papers are designed to resemble those in the board exams, making them a useful resource for exam preparation.
How can solving sample papers benefit me?
Solving sample papers helps you understand the exam format, identify important topics, improve time management and assess your readiness for the exam.
Do the sample papers come with solutions?
Yes, sample papers often include official solutions and marking schemes, allowing students to check their answers and understand the marking criteria.
