CBSE 12th Sample Paper: Prepare for Biology with CBSE sample paper, solve these questions..

CBSE board exams are starting from 15 February. In this, the 10th exam will be held from 15 February to 18 March, while the 12th exam will be held from 15 February to 4 April. The Central Board of Secondary Education i.e. CBSE has released sample papers for both 10th and 12th board exams, with the help of which the students appearing in the exam can prepare and get good marks. Let us know what kind of questions have been asked in the sample paper of Biology subject released by CBSE for the 12th board exam and also know what is the pattern of the paper.

According to the date sheet of CBSE 12th board exam, the Biology exam will be held on March 25 from 10.30 am to 1.30 pm. This 3-hour exam will be for a total of 70 marks. The Biology paper is divided into 5 sections, in which a total of 33 questions will be asked.

CBSE Board 12th Exam 2025: What kind of questions will be asked?

A total of 16 questions of 1 mark each will be asked in Section A.

A total of 5 questions of 2 marks each will be asked in Section B.

A total of 7 questions of 3 marks each will be asked in Section C.

2 case-based questions of 4 marks each will be asked in Section D.

A total of 3 questions of 5 marks each will be asked in Section E.

CBSE 12th Biology Sample Paper: How to download Biology sample paper

Go to the official website of CBSE cbseacademic.nic.in.

Click on the link for the 12th sample paper for 2024-25 on the homepage.

Now a new window will open, where subject-wise sample papers are given.

Click on the Biology sample paper link and download it.

CBSE 12th Biology Sample Paper Questions: Solve these questions

A culture plate of Lactobacillus shows blue colonies and colorless colonies. Explain the principle involved in the formation of such a difference in the color of the colonies.

Explain how the PCR technique can be used for amplification of a small amount of DNA template.

Bio-fertilizers are organisms that enrich the quality of nutrients in the soil. Explain the role of the three main sources of bio-fertilizers.

Explain how the advent of biotechnology has helped in preventing nematode infestation and increasing crop yield.

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