CUET Biology Important Questions 2025: Ace your Exam

Overview: Here’s an article unlocking the key CUET Biology important questions that will help you ace the preparation process to get admission to the university of your choice!  

Biology is a crucial domain subject for the CUET entrance exam because it was among the top 5 subjects with the maximum number of registrations for the academic year 2024.  

Since so many students are taking the test, getting a good score is necessary if you want to attend the top colleges like DU, JMI, BHU, etc. 

In order to give you an idea of the type of questions that can appear in the exam next year, we will discuss the CUET Biology important questions and answers in this post.

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CUET Biology Exam Pattern 2025 

Before preparing for CUET Biology Important Questions, let's understand the CUET exam pattern. 

CUET Biology has one Question Paper, which will have 50 questions, out of which 40 questions need to be attempted. 

The duration of the test will be of 45 minutes duration.

Criteria	Domain Test
Mode	Online and offline
Medium	English/Language Chosen in Section I
Type of Questions	Objective

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CUET Biology Exam Marking Scheme 2025

• The correct answer or the most appropriate answer will be rewarded Five marks (+5) 
• Any incorrect option marked will be given minus one mark (-1). 
• Unanswered/Marked for Review will be given no mark (0). 
• If more than one option is found to be correct, then Five marks (+5) will be awarded to only those who have marked any of the correct options. 
• If all options are found to be correct, then Five marks (+5) will be awarded to all those who have attempted the question. 
• If none of the options is found correct or a question is found to be wrong, or a question is dropped, then all candidates who have attempted the dropped question will be given five marks (+5) marks. 

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List of Units in CUET Biology Exam 

The CUET Biology exam covers a wide range of topics on which the CUET Biology Important Questions 2025 are framed. Focusing on the following key areas can significantly boost your performance.

• Unit I: Reproduction 
• Unit II: Genetics and Evolution 
• Unit III: Biology and Human Welfare 
• Unit IV: Biotechnology and Its Applications 
• Unit V: Ecology and Environment 

Check: CUET Subject List

CUET Biology Important Questions 2025 

It is feasible to score well if you pay attention to key subjects and are familiar with the type of questions asked in the exam. Let's take a look at a few CUET Biology Important Questions 2025:

1 - Which of the following pair of contrasting traits was not studied by Mendel?

(a) Pink and white flowers 

(b) Inflated and white flowers 

(c) Axial and terminal flowers 

(d) Green and yellow pods 

Answer - (a) Pink and white flowers 

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2 - Nucleosome is associated with molecules of histones.

(a) Four 

(b) Nine 

(c) Two 

(d) Eight 

Answer - (d) Eight 

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3 - Select the observations drawn from the human genome project which are correct.

(a) The human genome contains 3164.7 million bp.

(b) The average gene consists 3000 bases.

(c) Total number of genes is estimated at 30.000.

(d) The functions are unknown for over 50% of discovered genes.

(e) Less than 2% of the genome codes for proteins.

Choose the correct answer from the options given below:

(a) (A), (B), (C) and (D) only 

(b) (A), (C), (D) and (E) only 

(c) (A), (C) and (E) only 

(d) (A), (B), (C), (D) and (E) 

Answer - (d) (A), (B), (C), (D) and (E) 

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4 - The beetle used as a biocontrol agent for aphids and mosquitoes is:

(a) Trichoderma 

(b) Dragonflies 

(c) Ladybird 

(d) Silver fish 

Answer - (c) Ladybird 

Check: CUET English Previous Year Question Paper

5 - Which of the following is not the correctly matched pair of organism and its respective cell wall degrading enzyme?

(a) Fungi-Chitinase 

(b) Algae-Methylase 

(c) Plant cells - Cellulase 

(d) Bacteria - Lysozyme

Answer - (b) Algae-Methylase 

6 - Downstream processing method involves:

(a) Identification 

(b) Amplification 

(c) Fermentation 

(d) Purification 

Answer - (d) Purification 

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7 - Arrange the following steps involved in transformation of bacteria in a sequence from the initiation to end.

(a) Incubation of rDNA with bacterial cell on ice

(b) Treatment with divalent cations 

(c) Heat shock treatment 

(d) Selection on antibiotic containing agar plate 

(e) Placed them again on ice 

Choose the correct answer from the options given below:

(a) (A), (B), (D), (C), (E) 

(b) (B), (A), (C), (E), (D) 

(c) (B), (C), (D), (A), (E) 

(d) (A), (C), (B), (D), (E) 

Answer - (d) (A), (C), (B), (D), (E) 

Check: How Many Questions to Expect in CUET 2025?

8 - In a country, at any time, the population has the same number of youngs and mature ones. What type of growth does it reflect? 

(a) Expanding 

(b) Declining 

(c) Stable 

(d) S-shaped 

Answer - (c) Stable 

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9 - Two closely related species can co-exist indefinitely and violate the gause's 'competitive exclusion principle' by: 

(a) eliminating the inferior species 

(b) resource partitioning 

(c) interacting with each other symbiotically 

(d) changing the area of grazing 

Answer - (a) eliminating the inferior species 

10 - In which ecosystem is the biomass of primary consumers greater than producers?

(a) Forests 

(b) Grassland 

(c) Desert 

(d) Sea 

Answer - (d) Sea 

By following this guide and focusing on the essential areas, you’ll be well-prepared to tackle the CUET Biology exam and achieve your academic goals.

To know the questions that appeared in the CUET 2024 Biology paper and the CUET Biology important questions and answers pdf, scroll up and play the youtube video attached in this blog. 

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Key Takeaways 

• Familiarize yourself with the exam pattern, duration, and marking scheme of the CUET Biology exam to strategize your preparation effectively. 
• Prioritize studying all the topics in the units covering cell biology, genetics, plant and human physiology, biotechnology, and ecology to cover the most frequently tested concepts. 
• Use the provided CUET Biology Important Questions as a starting point to test your knowledge and identify areas that need improvement. 
• Practice answering questions CUET Biology Important Questions within the time limit to improve your speed and accuracy during the actual exam. 

Check: CUET English Syllabus 2025 PDF Download