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Molecular Basis of Inheritance · Question 41

NEET (UG) 2022 (Phase 2)MCQEasy📈 Topic in 38% papers+4−1
1

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

  1. Statement I is incorrect but Statement II is correct
  2. Both Statement I and Statement II are correct
  3. Both Statement I and Statement II are incorrect
  4. Statement I is correct but Statement II is incorrect

Answer

(2) Both Statement I and Statement II are correct

Solution

Statement I: As per NCERT, the DNA-dependent DNA polymerases catalyse polymerisation only in one direction, that is 5' 3' ⇒ correct.

Statement II: ∵ polymerisation is possible only in the 5' 3' direction, on the template with polarity 3' 5' replication is continuous, while on the template with polarity 5' 3' it is discontinuous (Okazaki fragments, later joined by DNA ligase) ⇒ correct.

∴ Both statements are correct.

Answer: (2)

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2

Match List - I with List - II. Choose the correct answer from the options given below

  1. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
  2. (a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
  3. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
  4. (a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)
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3

Match List-I with List-II: Choose the correct answer from the options given below:

  1. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
  2. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
  3. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
  4. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
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4

If DNA contained sulfur instead of phosphorus and proteins contained phosphorus instead of sulfur, what would have been the outcome of Hershey and Chase experiment?

  1. Radioactive phosphorus in bacterial cells
  2. No radioactive sulfur in bacterial cells
  3. Both radioactive sulfur and phosphorus in bacterial cells
  4. Radioactive sulfur in bacterial cells
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5

Against the codon 5' UAC 3', what would be the sequence of anticodon on tRNA?

  1. 5' GUA 3'
  2. 5' AUG 3'
  3. 5' ATG 3'
  4. 5' GTA 3'
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6

If A and C make 30% and 20% of DNA, respectively, what will be the percentage composition of T and G?

  1. T : 20%, G : 20%
  2. T : 20%, G : 30%
  3. T : 30%, G : 20%
  4. T : 30%, G : 30%
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7

Complete the flow chart on central dogma. [figure]

  1. (a) - Transduction; (b) - Translation; (c) - Replication; (d) - Protein
  2. (a) - Replication; (b) - Transcription; (c) - Transduction; (d) - Protein
  3. (a) - Translation; (b) - Replication; (c) - Transcription; (d) - Transduction
  4. (a) - Replication; (b) - Transcription; (c) - Translation; (d) - Protein
NEET (UG) 2021
8

What is the role of RNA polymerase III in the process of transcription in eukaryotes?

  1. Transcribes only snRNAs
  2. Transcribes rRNAs (28S, 18S and 5.8S)
  3. Transcribes tRNA, 5S rRNA and snRNA
  4. Transcribes precursor of mRNA
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9

DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as

  1. Polymorphic DNA
  2. Satellite DNA
  3. Repetitive DNA
  4. Single nucleotides
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10

Identify the correct statement.

  1. Split gene arrangement is characteristic of prokaryotes
  2. In capping, methyl guanosine triphosphate is added to the 3' end of hnRNA
  3. RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria
  4. The coding strand in a transcription unit is copied to an mRNA
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11

If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?

  1. T : 20 ; G : 25 ; C : 25
  2. T : 20 ; G : 30 ; C : 20
  3. T : 20 ; G : 20 ; C : 30
  4. T : 30 ; G : 20 ; C : 20
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