CUET Biology Question Paper 2025 (Available)- Download Answer Key and Solution PDF

The CUET 2025 exam is being conducted from 13th May to 3rd June. The CUET Biology Question Paper 2025 with Answer Key and Solution PDF is available here. The CUET Biology was moderate to difficult in terms of difficulty level.

As per the exam pattern, the CUET Biology exam consists of 50 questions for 250 marks to be attempted in 60 minutes. 5 marks are awarded for each correct answer, and 1 mark is deducted for incorrect answer.

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CUET 2025 Question Paper with Solution PDF

CUET Biology Question Paper 2025 with Answer Key

CUET Biology Question Paper 2025	Download PDF	Check Solution

Question 1:

Which of the following organelles is involved in the synthesis of proteins?

(1) Ribosome
(2) Lysosome
(3) Golgi apparatus
(4) Peroxisome

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Question 2:

If a heterozygous tall plant (Tt) is crossed with a dwarf plant (tt), what will be the phenotypic ratio of the offspring?

(1) 1 Tall : 3 Dwarf
(2) 1 Tall : 1 Dwarf
(3) All Tall
(4) All Dwarf

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Question 3:

Which of the following elements is essential for the synthesis of chlorophyll?

(1) Calcium
(2) Magnesium
(3) Sodium
(4) Potassium

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Question 4:

Which part of the nephron is primarily responsible for filtration of blood?

(1) Loop of Henle
(2) Proximal convoluted tubule
(3) Bowman's capsule
(4) Collecting duct

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Question 5:

Which of the following is a pioneer species in primary succession on rocks?

(1) Ferns
(2) Lichens
(3) Mosses
(4) Algae

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Question 6:

Which type of bond is found between amino acids in a protein chain?

(1) Hydrogen bond
(2) Peptide bond
(3) Ionic bond
(4) Glycosidic bond

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Question 7:

Which enzyme is responsible for the unwinding of DNA during replication?

(1) DNA polymerase
(2) DNA ligase
(3) DNA helicase
(4) RNA primase

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Question 8:

Double fertilization is a characteristic feature of which group of plants?

(1) Bryophytes
(2) Gymnosperms
(3) Pteridophytes
(4) Angiosperms

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Question 9:

The part of the brain responsible for maintaining posture and balance is the:

(1) Cerebrum
(2) Medulla oblongata
(3) Cerebellum
(4) Hypothalamus

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Question 10:

The gradual and predictable change in species composition in an area is known as:

(1) Succession
(2) Evolution
(3) Mutation
(4) Speciation

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Question 11:

During which phase of mitosis do the centromeres split and chromatids move to opposite poles?

(1) Prophase
(2) Metaphase
(3) Anaphase
(4) Telophase

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Question 12:

Which of the following organisms is correctly matched with its kingdom?

(1) Amoeba – Plantae
(2) Euglena - Fungi
(3) Paramecium - Protista
(4) Nostoc - Animalia

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Question 13:

Which of the following is not a part of the human digestive system?

(1) Stomach
(2) Pancreas
(3) Liver
(4) Lungs

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Question 14:

Which of the following is responsible for the transport of water in plants?

(1) Xylem
(2) Phloem
(3) Epidermis
(4) Stomata

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Question 15:

Which gas is primarily responsible for the greenhouse effect?

(1) Oxygen
(2) Nitrogen
(3) Carbon dioxide
(4) Hydrogen

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CUET Biology Important Topics and Difficulty Level

The CUET Biology 2025 question paper is expected to consist of 15–18 moderately difficult questions, covering topics such as Human Physiology, Reproduction, Cell Structure and Function, Plant Physiology, Genetics and Evolution, Biotechnology, and Biomolecules. 8–10 questions of easy to moderate difficulty are expected from topics like Ecology and Environment, Diversity in Living Organisms, and Biology and Human Welfare. The overall difficulty level of the CUET Biology paper is expected to be moderate to difficult.

Chapter	Important Topics	Expected Weightage (Questions)
Reproduction	Human Reproduction, Reproductive Health, Menstrual Cycle, Fertilization	4 – 5
Genetics and Evolution	Mendelian Inheritance, Molecular Basis of Inheritance, Evolution, Hardy-Weinberg Principle	3 – 4
Human Physiology	Digestive System, Respiratory System, Circulatory System, Nervous System, Excretory System	4 – 5
Biotechnology	Principles of Biotechnology, Genetic Engineering, Applications in Medicine	2 – 3
Ecology and Environment	Ecosystems, Biodiversity, Environmental Issues, Conservation	2 – 3
Cell Structure and Function	Cell Theory, Cell Organelles, Cell Division (Mitosis and Meiosis)	2 – 3
Plant Physiology	Photosynthesis, Respiration, Plant Growth and Development, Transport in Plants	2 – 3
Biology and Human Welfare	Human Diseases, Immunity, Microbes in Human Welfare, Cancer, AIDS	2 – 3
Diversity in Living Organisms	Classification of Organisms, Five Kingdom Classification, Characteristics of Major Phyla	1 – 2
Biomolecules	Carbohydrates, Proteins, Lipids, Nucleic Acids, Enzymes	1 – 2

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CUET Questions

1.
Select the word closest in meaning to the word: Postulate

Highlight
Disprove
Refute
Hypothesize

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2.
He is very fond of music. The underlined word is:

Conjunction
Preposition
Adverb
Interjection

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3.
If a standard knockout tournament is being organized for a total of 19 teams, what is the total number of matches that will be played in the tournament, and how many teams will receive a 'Bye' in the first round?

$ 18 \text{ matches and } 13 \text{ byes} $
$ 19 \text{ matches and } 13 \text{ byes} $
$ 18 \text{ matches and } 3 \text{ byes} $
$ 20 \text{ matches and } 5 \text{ byes} $

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4.
In the given analogy, choose the word which will replace the question mark: \[ \text{NEGI : MVTR :: SING : ?} \]

TRNS
TRNT
FRMT
HRMT

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5.
For the following reaction choose the incorrect expression of rate of reaction. \[ 5\text{ Br}^{-}(aq.) + \text{BrO}_{3}^{-}(aq.) + 6\text{ H}^{+}(aq.) \rightarrow 3\text{ Br}_{2}(aq.) + 3\text{ H}_{2}\text{O}(l) \]

$\text{Rate} = -\frac{1}{5}\frac{\Delta[\text{Br}^{-}]}{\Delta t}$
$\text{Rate} = -\frac{1}{6}\frac{\Delta[\text{H}^{+}]}{\Delta t}$
$\text{Rate} = -\frac{1}{3}\frac{\Delta[\text{Br}_{2}]}{\Delta t}$
$\text{Rate} = -\frac{\Delta[\text{BrO}_{3}^{-}]}{\Delta t}$

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6.
Two-point charges, $q_1 = 36\ \mu\text{C}$ and $q_2 = -9\ \mu\text{C}$ are placed at a distance of $30\text{ cm}$. What distance from $q_1$, where the net electric field is zero, will be:

$10\text{ cm}$
$20\text{ cm}$
$60\text{ cm}$
$30\text{ cm}$

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CUET Biology Question Paper 2025 (Available)- Download Answer Key and Solution PDF

CUET Biology Question Paper 2025 with Answer Key

CUET Biology Important Topics and Difficulty Level

CUET Questions

1.
Select the word closest in meaning to the word: Postulate

2.
He is very fond of music. The underlined word is:

3.
If a standard knockout tournament is being organized for a total of 19 teams, what is the total number of matches that will be played in the tournament, and how many teams will receive a 'Bye' in the first round?

4.
In the given analogy, choose the word which will replace the question mark: \[ \text{NEGI : MVTR :: SING : ?} \]

5.
For the following reaction choose the incorrect expression of rate of reaction. \[ 5\text{ Br}^{-}(aq.) + \text{BrO}_{3}^{-}(aq.) + 6\text{ H}^{+}(aq.) \rightarrow 3\text{ Br}_{2}(aq.) + 3\text{ H}_{2}\text{O}(l) \]

6.
Two-point charges, $q_1 = 36\ \mu\text{C}$ and $q_2 = -9\ \mu\text{C}$ are placed at a distance of $30\text{ cm}$. What distance from $q_1$, where the net electric field is zero, will be:

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CUET Biology Question Paper 2025 with Answer Key

CUET Biology Important Topics and Difficulty Level

CUET Questions

1.Select the word closest in meaning to the word: Postulate

2.He is very fond of music. The underlined word is:

3.If a standard knockout tournament is being organized for a total of 19 teams, what is the total number of matches that will be played in the tournament, and how many teams will receive a 'Bye' in the first round?

4.In the given analogy, choose the word which will replace the question mark: \[ \text{NEGI : MVTR :: SING : ?} \]

5.For the following reaction choose the incorrect expression of rate of reaction. \[ 5\text{ Br}^{-}(aq.) + \text{BrO}_{3}^{-}(aq.) + 6\text{ H}^{+}(aq.) \rightarrow 3\text{ Br}_{2}(aq.) + 3\text{ H}_{2}\text{O}(l) \]

6.Two-point charges, $q_1 = 36\ \mu\text{C}$ and $q_2 = -9\ \mu\text{C}$ are placed at a distance of $30\text{ cm}$. What distance from $q_1$, where the net electric field is zero, will be:

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1.
Select the word closest in meaning to the word: Postulate

2.
He is very fond of music. The underlined word is:

3.
If a standard knockout tournament is being organized for a total of 19 teams, what is the total number of matches that will be played in the tournament, and how many teams will receive a 'Bye' in the first round?

4.
In the given analogy, choose the word which will replace the question mark: \[ \text{NEGI : MVTR :: SING : ?} \]

5.
For the following reaction choose the incorrect expression of rate of reaction. \[ 5\text{ Br}^{-}(aq.) + \text{BrO}_{3}^{-}(aq.) + 6\text{ H}^{+}(aq.) \rightarrow 3\text{ Br}_{2}(aq.) + 3\text{ H}_{2}\text{O}(l) \]

6.
Two-point charges, $q_1 = 36\ \mu\text{C}$ and $q_2 = -9\ \mu\text{C}$ are placed at a distance of $30\text{ cm}$. What distance from $q_1$, where the net electric field is zero, will be: