NEET UG 2025 Biology Part Questions and Answers
1. The complex II of mitochondrial electron transport chain is also known as
(1) Cytochrome bc1
(2) Succinate dehydrogenase
(3) Cytochrome c oxidase
(4) NADH dehydrogenase
2. Polymerase chain reaction (PCR) amplifies DNA following the equation.
(1) N2
(2) 2n
(3) 2n + 1
(4) 2N2
3. What are the potential drawbacks in adoption of the IVF method?
A. High fatality risk to mother
B. Expensive instruments and reagents
C. Husband/wife necessary for being donors
D. Less adoption of orphans
E. Not available in India
F. Possibility that the early embryo does not survive
Choose the correct answer from the options given below:
(1) B, D, F only.
(2) A, C, D, F only
(3) A, B, C, D only
(4) A, B, C, E, F only
4. What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog?
(1) Aorta
(2) Pulmonary artery
(3) Pulmonary vein
(4) Vena cava
5. Which one of the following statements refers to reductionist biology?
(1) Physico-chemical approach to study and understand living organisms.
(2) Physiological approach to study and understand, living organisms.
(3) Chemical approach to study and understand living organisms.
(4) Behavioural approach to study and understand living organisms.
6. Given below are two statements:
Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable.
Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repairing mechanism.
In the light of the above statements, choose the most appropriate answer from the options given below:
(1) Both statement I and statement II are correct
(2) Both statement I and statement II are incorrect
(3) Statement I is correct but statement II is incorrect
(4) Statement I is incorrect but statement II is correct
7. Epiphytes that are growing on a mango branch is an example of which of the following?
(1) Commensalism
(2) Mutualism
(3) Predation
(4) Amensalism
8. From the statements given below choose the correct option:
A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S.
B. Each ribosome has two sub-units.
C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S.
D. The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S.
E. The two sub-units of 80S are 60S and 30S and that of 70S are 50S and 30S
(1) A, B, C are true
(2) A, B, D are true
(3) A, B, E are true
(4) B, D, E are true
9. Which one of the following is an example of ex-situ conservation?
(1) National Park
(2) Wildlife Sanctuary
(3) Zoos and botanical gardens
(4) Protected areas.
10. Given below are two statements:
Statement I: The primary source of energy in an ecosystem is solar energy.
Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
In the light of the above statements, choose the most appropriate answer from the options given below:
(1) Both statement I and statement II are correct
(2) Both statement I and statement II are incorrect
(3) Statement I is correct but statement II is incorrect
(4) Statement I is incorrect but statement II is correct
11. Match List-I with List-II.
|
List-I |
List-II |
|
A. Emphysema |
I. Rapid spasms in muscle due to low Ca++ in body fluid |
|
B. Angina Pectoris |
II. Damaged alveolar walls and decreased respiratory surface |
|
C. Glomerulonephritis
|
III. Acute chest pain when not enough oxygen is reaching to heart muscle |
|
D. Tetany |
IV. Inflammation of glomeruli of kidney
|
Choose the correct answer from the options given below:
(1) A-III, B-I, C-IV, D-II
(2) A-III, B-I, C-II, D-IV
(3) A-II, B-IV, C-III, D-I
(4) A-II, B-III, C-IV, D-I
12. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Both wind and water pollinated flowers are not very colourful and do not produce
nectar.
Reason (R): The flowers produce enormous amount of pollen grains in wind and water
pollinated
flowers.
In the light of the above statements, choose the correct answer from the options given below:
(1) Both A and R are true and R is the correct explanation of A.
(2) Both A and R are true but R is NOT the correct explanation of A.
(3) A is
true but R is false.
(4) A is
false but R is true.
13. Which of the following is an example of non—distilled alcoholic beverage produced by yeast?
(1) Whisky
(2) Brandy
(3) Beer
(4) Rum
14. Given
below are two statements:
Statement I: In a floral formula ⊕ stands for zygomorphic nature of the flower, and G stands for inferior ovary.
Statement II: In a floral formula ⊕stands for actinomorphic nature of the flower and G stands for superior ovary.
In the light of the above statements, choose the most appropriate answer from the options given below:
(1) Both
statement I and statement II are correct
(2) Both
statement I and statement II are incorrect
(3) Statement I is correct but statement II is incorrect
(4) Statement I is incorrect but statement II is correct
15. Streptokinase produced by bacterium Streptococcus is used for
(1) Curd
production
(2) Ethanol
production
(3) Liver
disease treatment
(4) Removing clots from blood vessels
16. Which chromosome in the human genome has the highest number of genes?
(1)
Chromosome X
(2)
Chromosome Y
(3)
Chromosome 1
(4)
Chromosome 10
17. Which of the following statement is correct about location of the male frog copulatory pad?
(1) First
and Second digit of fore limb
(2) First
digit of hind limb
(3) Second
digit of fore limb
(4) First
digit of the fore limb
18. Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?
(1) Ethylene
(2) Abscisic
acid
(3)
Gibberellin
(4)
Cytokinin
19. While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelome of that animal?
(1)
Acoelomate
(2)
Pseudocoelomate
(3)
Schizocoelomate
(4) Spongocoelomate
20. Match
List-I with List-II.
List-I List-II
A. Head I. Enzymes
B. Middle
piece II. Sperm motility
C. Acrosome III. Energy
D. Tail IV. Genetic material
Choose the correct answer from the options given below:
(1) A-IV, B-III, C-I, D-II
(2) A-IV, B-III, C-II, D-I
(3) A-III, B-IV, C-II, D-I
(4) A-III, B-II, C-I, D-IV
Answers:
1. (2) Succinate dehydrogenase
2. (2) 2n
3. (1) B, D, F only.
4. (4) Vena cava
5. (1) Physico-chemical approach to study and understand living organisms.
6. (1) Both statement I and statement II are correct
7. (1) Commensalism
8. (1) A, B, C are true
9. (3) Zoos and botanical gardens
10. (3) Statement I is correct but statement II is incorrect
11.(4) A-II, B-III, C-IV, D-I
12. (2) Both A and R are true but R is NOT the correct explanation of A.
13. (3) Beer
14. (4) Statement I is incorrect but statement II is correct
15.(4) Removing clots from blood vessels
16. (3) Chromosome 1
17. (4) First digit of the forelimb
18. (4) Cytokinin
19. (2) Pseudocoelomate
20. (1) A-IV, B-III, C-I, D-II