NEET Biology Answer Key 2025 (Available): Unofficial Set Wise Key

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Question 11: Given below are two statements :

Statement 1: The primary source of energy in an ecosystem is solar energy.

Statement 2: The rate of production of organic matter during photosynthesis in an ecosystem is called primary productivity (NPP).

Assertion (A) : A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and 7-celled.

Reason (R): The egg apparatus has 2 polar nuclei.

Chosse the correct option.

Question 13: Match the column.

Statement 1: In the RNA world, RNA is considered the first genctic material evolved to carry out essential life processes. RNA acts as a genctic material and also as a catalyst for some important biochemical reactions in living systems. Beitig reactive, RNA is unstable.
Statement II: DNA evolved from RNA and is a more: sláble 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 i

Question 19: 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 SOS and 20S.

E. The two sub-units of 80S are 605 and 30S and that of 70S are 50S and 30S.

 (1) A, B, C are true

Question 20: Which one of the following is an example of ex-suit conservation?

(3) Zoos and Botanical gardens

Question 21: Given below are two statements :
Statement I: The primary source of energy in an ecosystem is solar energy.
Statement Il: 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

(3) Statement I is correct but statement Il is incorrect

Question 22: Which of the following is an example of non-distilled alcoholic beverage produced by yeast?

(3) Beer

Question 23: Given below are two statements :

Statement 1 : In a Moral formula ⊕ stands for zygomorphic nature of the Hower, and & stands for inferior ovary.

Statement Il: In a floral formula G stands for actinomorphic nature of the flower and G stands for superior ovary.

In the light of the above statements, choose the correct answer from the options given below :

(4) Statement I is incorrect but Statement Il is correct

(4) Removing blood clots from bloof vessels

(2) Chromosome Y

(4) Cytokinin

Question 27: Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in

the correct sequence.

A. Prothallus stage

B. Meiosis in spore mother cells

C. Fertilisation

D. Formation of archegonia and antheridia in gametophytc.

E. Transfer of antherozoids to the archegonia in presence of water.

Choose the cotrect answer from the options given below :

(1) B, A, D, E.

Question 28: Which of following organisms cannot fix nitrogen?

(2) D only

Question 29: Given below are two statements :

Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.

Statement Il : RNA interference (RNAi) takes place in all eukaryotic grganisms as a method of cellular defence. m

In the light of the aboye, statements, choose the most appropriate answer from the options given below :

(4) Statement I is incorrect but Statement Il is correct

Question 30: Find the statement that is NOT correct with regrad to the structure of monocot system

(1) Hypodermis is parenchymatous.

Question 31: The correst sequence gi events in the life cycle of bryophytes is

A. Fusion of anthegozoid with egg-

B. Attachment of gametophyte to substratum. M

C. Reduction division to produce haploid spores.

D. Formation of sporophyte.

E. Release of antherozoids into water.

Choose the correct answer from the options given below:

(3) B,E,A,D,C

Question 32: Each of the following characteristics represent a Kingdom proposed by Whitaker. Arrange the following in increasing order of complexity of body organization.

1. Multicellular heterotrophs with|cell wall made of chitin.
2. Heterotrophs with tissue/orghh/organ system level of body organizatión. 
3. Prokaryotes with cell wall made of polysaccharides and amino acids,
4. Eukaryotic autotrophs with tissue/organ level of body organization. 
5. Eukaryotes with cellular body organization. 

Choose the correct answer from the options given below

(2) C,E,A,D,B

Question 33: Who is known as the father of Ecology in India?

(2) Romdeo Mishra

Question 34: Match List I with List II :

(3) A-IV, B-III, C-I, D-II

Question 35: Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). 17

Assertion (A) : The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell.

Reason (R) : Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus.

In the light of the above statements, choose the correct answer from the options given below :

(2) Both A and R are true but R is not the correct explanation of A

Question 36: Match List I with List 2 :

(1) A-II, B-III, C-IV, D-I

Question 37: Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). 50

Assertion (A) : The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell.

Reason (R) : Vesicles coptaining materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus. 0)

In the light of the above sfatements, choose the correct answer from the options given below

(1) Both A and Rare trug and R is the correct explanation of A

Question 38: Genes R and Y follow independent assortment. IRRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?

(3) Phenotypic ratio - 9: 3: 3 : 1

Question 39: Histones afe enriched with -

(1) Lysine & Arginine

Question 40: Which of the following is the unit of productivity of an Ecosystem?

(4) (KCal m^-2 )yr^-1

Question 41: Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : Cells of the tapetum possess dense cytoplasm and goperally have more than one nucleus, pelt:

Reason (R) : Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells.

In light of the above statements, choose the most appropriate ansier from the options given below :

(1) Both A and, Rare thie and R is the correct explanation of A

Question 42: How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?

(3) 1 Meiosis and 3 Müpsis

Question 43: Given below are two statements :

Statement  I: Fig fruit is a non-vegetarian fruit as it as relief i apa in egetarian fruit

Statement Il : Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp.

In the light of the abové statements, choose the most appropriate answer from the options given below:

(1) Both statement I and statement Il are correct

Question 44: What is the main function of the spindle fibers during mitosis ?

(1) To separate the chromosomes

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