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Molecular Basis of Inheritance

NEET (UG) 2025MCQMedium📈 Topic in 25% papers+4−1
Ques. 1NEET (UG) 2025

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

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

Answer

(3) Both statement I and statement II are correct

Solution

Statement I: According to the RNA world hypothesis, RNA was the first genetic material. RNA acts as genetic material and also as a catalyst (ribozymes) for some important biochemical reactions; its 2'-OH group makes it reactive and hence unstable. Correct.

Statement II: DNA evolved from RNA with chemical modifications that make it more stable. Its double-helical complementary strands resist changes by evolving a process of repair. Correct.

Answer: (3)

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Ques. 2NEET (UG) 2025

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

  1. Statement I is correct but statement II is incorrect
  2. Statement I is incorrect but statement II is correct
  3. Both statement I and statement II are correct
  4. Both statement I and statement II are incorrect
Ques. 3NEET (UG) 2025

Who proposed that the genetic code for amino acids should be made up of three nucleotides?

  1. Jacques Monod
  2. Franklin Stahl
  3. George Gamow
  4. Francis Crick
Ques. 4NEET (UG) 2025

Histones are enriched with -

  1. Phenylalanine & Leucine
  2. Phenylalanine & Arginine
  3. Lysine & Arginine
  4. Leucine & Lysine
Ques. 5NEET (UG) 2025

Which factor is important for termination of transcription?

  1. (rho)
  2. (gamma)
  3. (alpha)
  4. (sigma)
Ques. 6NEET (UG) 2024

The lactose present in the growth medium of bacteria is transported to the cell by the action of

  1. Beta-galactosidase
  2. Acetylase
  3. Permease
  4. Polymerase
Ques. 7NEET (UG) 2024

A transcription unit in DNA is defined primarily by the three regions in DNA and these are with respect to upstream and down stream end;

  1. Repressor, Operator gene, Structural gene
  2. Structural gene, Transposons, Operator gene
  3. Inducer, Repressor, Structural gene
  4. Promoter, Structural gene, Terminator
Ques. 8NEET (UG) 2024

Which of the following statement is correct regarding the process of replication in E. coli?

  1. The DNA dependent DNA polymerase catalyses polymerization in one direction that is 3' 5'
  2. The DNA dependent RNA polymerase catalyses polymerization in one direction, that is 5' 3'
  3. The DNA dependent DNA polymerase catalyses polymerization in 5' 3' as well as 3' 5' direction
  4. The DNA dependent DNA polymerase catalyses polymerization in 5' 3' direction
Ques. 9NEET (UG) 2024

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

  1. A-III, B-II, C-I, D-IV
  2. A-III, B-IV, C-I, D-II
  3. A-II, B-III, C-IV, D-I
  4. A-IV, B-II, C-II, D-III
Ques. 10NEET (UG) 2024

Which one is the correct product of DNA dependent RNA polymerase to the given template? 3'TACATGGCAAATATCCATTCA5'

  1. 5'AUGUACCGUUUAUAGGUAAGU3'
  2. 5'AUGUAAAGUUUAUAGGUAAGU3'
  3. 5'AUGUACCGUUUAUAGGGAAGU3'
  4. 5'ATGTACCGTTTATAGGTAAGT3'
Ques. 11NEET (UG) 2024

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

  1. A-II, B-IV, C-I, D-III
  2. A-III, B-II, C-IV, D-I
  3. A-III, B-IV, C-I, D-II
  4. A-IV, B-III, C-I, D-II

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