Biomolecules and Fundamental Processes

JKPSC Assistant Professor (Zoology) · Zoology · 102 practice questions with answers and explanations: 10 Easy, 92 Medium, 0 Hard.

Sample questions

Sample Easy question 1

The enzyme that joins Okazaki fragments is:

  1. DNA ligase
  2. Primase
  3. Helicase
  4. DNA polymerase I
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Answer: A. Ligase seals the nicks.

Sample Easy question 2

Which amino acid is coded by the start codon AUG?

  1. Alanine
  2. Leucine
  3. Methionine
  4. Valine
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Answer: C. AUG also marks the start of translation.

Sample Easy question 3

The universal stop codons are UAA, UAG and:

  1. CCC
  2. UGA
  3. AUG
  4. UUU
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Answer: B. They do not code for any amino acid.

Sample Medium question 4

The origin of replication in E. coli is called:

  1. oriC
  2. lac
  3. trp
  4. ori
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Answer: A. Replication proceeds in both directions.

Sample Medium question 5

The replication fork is the:

  1. Centre of the gene
  2. Site where the DNA is unwound and copied
  3. End of the chromosome
  4. Nucleolus
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Answer: B. It moves along the DNA.

Sample Medium question 6

Replication of the lagging strand requires:

  1. No primer
  2. Only one primer
  3. No ligase
  4. Repeated priming and Okazaki fragments
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Answer: D. It is discontinuous.

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