NEET UG 2025 Biology Part Questions and Answers
21. 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 gametophyte.
E. Transfer of antherozoids to the archegonia in presence of water.
Choose the correct answer from the options given below:
(1) B, A, D,
E, C
(2) B, A, E,
C, D
(3) D, E, C,
A, B
(4) E, D, C,
B, A
22. Cardiac
activities of the heart are regulated by:
A. Nodal
tissue
B. A special neural centre in the medulla oblongata
C. Adrenal
medullary hormones
D. Adrenal
cortical hormones
Choose the correct answer from the options given below:
(1) A, B and
C Only.
(2) A, B, C
and D
(3) A, C and
D Only
(4) A, B and
D Only
23. Which
of following organisms cannot fix nitrogen?
A. Azotobacter
B. Oscillatoria
C. Anabaena
D. Volvox
E. Nostoc
Choose the correct answer from the options given below:
(1) A only
(2) D only
(3) B only
(4) E only
24. Given
below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of
cellular
defence.
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
25.
In the above represented plsmid an alien piece of DNA is inserted at EcoRI site. Which of the following strategies will be chosen to select the recombinant colonies?
(1) Using ampicillin & tetracyclin containing medium plate.
(2) Blue
color colonies will be selected.
(3) White
color colonies will be selected.
(4) Blue color colonies grown on ampicillin plates can be selected.
26. Which of the following genetically engineered organisms was used by Eli Lilly to prepare human insulin?
(1) Bacterium (2) Yeast (3) Virus (4) Phage
27. Name the class of enzyme that usually catalyze the following reaction:
S – G + S# →
S + S# – G
Where, G → a
group other than hydrogen
S → a
substrate
S# → another
substrate
(1) Hydrolase
(2) Lyase
(3) Transferase
(4) Ligase
28. Find the statement that is NOT correct with regard to the structure of monocot stem.
(1)
Hypodermis is parenchymatous.
(2) Vascular
bundles are scattered.
(3) Vascular
bundles are conjoint and closed.
(4) Phloem
parenchyma is absent.
29. The correct sequence of events in the life cycle of bryophytes is
A. Fusion of
antherozoid with egg.
B.
Attachment of gametophyte to substratum.
C. Reduction
division to produce haploid spores.
D. Formation
of sporophyte.
E. Release
of antherozoids into water.
Choose the correct answer from the option given below:
(1) D, E, A, C, B
(2) B, E, A, C, D
(3) B, E, A, D, C
(4) D, E, A, B, C
30. Which
are correct:
A. Computed tomography and magnetic resonance imaging detect cancers of internal organs.
B. Chemotherapeutics drugs are used to kill noncancerous cells.
C. α-interferon activate the cancer patients’ immune system and helps in destroying the
tumour.
D. Chemotherapeutic drugs are biological response modifiers.
E. In the case of leukaemia blood cells counts are decreased.
Choose the correct answer from the option given below:
(1) B and D only
(2) D and E only
(3) C and D only
(4) A and C only
Answers:
21. (1) B, A, D, E, C
22. (1) A, B and C Only.
23. (2) D only
24. (4) Statement I is incorrect but statement II is Correct
25. (3) White color colonies will be selected.
26. (1) Bacterium
27. (3) Transferase
28.(1) Hypodermis is parenchymatous.
29. (3) B, E, A, D, C
30. (4) A and C only
31. Match List-I with List-II.
List-I | List-II |
A. Centromere | I.Mitochondrion |
B. Cilium | II. Cell Division |
C. Cristae | III. Cell movement |
D. Cell membrane | IV. Phospholipid Layer |
Choose the correct answer from the options given below:
(1) A-I, B-II, C-III, D-IV
(2) A-II, B-I, C-IV, D-III
(3) A-IV, B-II, C-III, D-I
(4) A-II, B-III, C-I, D-IV
32. Match
List-I with List-II.
List-I List-II
A.
Chlorophyll a I. Yellow-green
B.
Chlorophyll b II. Yellow
C.
Xanthophylls III. Blue-green
D. Carotenoids IV. Yellow to Yellow-orange
Choose the
option with all correct matches.
(1) A-III,
B-IV, C-II, D-I
(2) A-III,
B-I, C-II, D-IV
(3) A-I,
B-II, C-IV, D-III
(4) A-I,
B-IV, C-III, D-II
33. Find
the correct statements:
A. In human pregnancy, the major organ systems are formed at the end of 12 weeks.
B. In human pregnancy the major organ systems are formed at the end of 8 weeks.
C. In human pregnancy heart is formed after one month of gestation.
D. In human pregnancy, limbs and digits develop by the end of second month.
E. In human pregnancy the appearance of hair usually observed in the fifth month.
Choose the correct answer from the options given below:
(1) A and E
Only
(2) B and C
Only
(3) B, C, D
and E Only
(4) A, C, D
and E Only
34. In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called:
(1)
Coleoptile
(2)
Coleorhiza
(3)
Integument
(4) Aleurone
layer
35. Which of the following diagrams is correct with regard to the proximal (P) and distal (D) tubule of the Nephron.
36. Identify the part of a bio-reactor which is used as a foam braker from the given figure
1. A
2.B
3. D
4. C
37. Given below are two statements: One is labelled as
Assertion (A) and the other is labelled as Reason (R).
Assertion (A): A typical unfertilized, angiosperm embryo sac at maturity is 8 nucleate and 7-celled.
Reason (R): The egg apparatus has 2 polar nuclei. 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.
38. A specialized membranous structure in a prokaryotic cell which helps in cell wall formation, DNA replication and respiration is:
(1) Mesosome
(2) Chromatophores
(3) Cristae
(4) Endoplasmic Reticulum
39. Which of the following are the post-transcriptional events in an eukaryotic cell?
A. Transport of pre-mRNA to cytoplasm prior to splicing.
B. Removal of introns and joining of exons.
C. Addition of methyl group at 5’ end of hnRNA.
D. Addition of adenine residues at 3’ end of hnRNA.
E. Base pairing of two complementary RNAs.
Choose the correct answer from the options given below:
(1) A, B, C only
(2) B, C, D only
(3) B, C, E only
(4) C, D, E only
40. What is the pattern of inheritance for polygenic trait?
(1) Mendelian inheritance pattern
(2) Non-mendelian inheritance pattern
(3) Autosomal dominant pattern
(4) X-linked recessive inheritance pattern
Answers:
31. (4) A-II, B-III, C-I, D-IV
32.(2) A-III, B-I, C-II, D-IV
33.(4) A, C, D and E Only
34. (4) Aleurone layer
35.3
36.4. C
37. (3) A is true but R is false.
38.(1) Mesosome
39. (2) B, C, D only
40. (2) Non-mendelian inheritance pattern