1. Which of the following enzymes are used to join bits of DNA?
8. True replication of DNA is possible due to
Answers
a) DNA ligase2. Semi conservative replication of DNA was first demonstrated in
b) DNA polymerase
c) primase
d) Endonuclease
a) Escherichia coli3. Mode of DNA replication in E.coli is
b) Streptococcus pneumonae
c) Salmonella typhimuriam
d) Drosophila melanogaster
a) Conservative and unidirectional4. When DNA replication starts
b) Semiconservative and unidirectional
c) Conservative and bidirectional
d) Semiconservative and bidirectional
a) The phosphodiester bonds between the adjacent nucleotides break5. During the replication of DNA, the synthesis of DNA on lagging strand takes place in segments, these segments are called
b) The bonds between the nitrogen base and deoxyribose sugar break
c) The leading strand produces Okazaki fragments
d) The hydrogen bonds between the nucleotides of two strand break

a) Satellite segments6. The elongation of the leading strand during DNA synthesis
b) Double helix segments
c) Kornbeg segments
d) Okazaki segments
a) Progresses away from the replication fork7. Eukaryotes differ from prokaryote in mechanism of DNA replication due to:
b) Occur in 3’-5’ direction
c) Produces Okazaki fragment
d) Depend on the action of DNA polymerase
a) Different enzyme for synthesis of lagging and leading strand
b) Use of DNA primer rather than RNA primer
c) Unidirectional rather than bidirectional replication
d) Discontinuous rather than semidiscontinuous replication
8. True replication of DNA is possible due to
a) Hydrogen bonding9. Unwinding of DNA is done by
b) Phosphate backbone
c) Complementary base pairing rule
d) None of the above
a) Helicase10. DNA synthesis can be specifically measured by estimating the incorporation of radio labelled
b) ligase
c) Hexonuclease
d) Topoisomerase
a) uracilFree online MCQ Test on: Transcription -> Translation -> Protein Synthesis
b) thymine
c) Adenine
d) Deoxyribose sugar
Answers
1. DNA ligase
2. a) Escherichia coli
3. d) Semiconservative and bidirectional
4. d) The hydrogen bonds between the nucleotides of two strand break
5. d) Okazaki segments
6. d) Depend on the action of DNA polymerase
7. d) Discontinuous rather than semidiscontinuous replication
8. c) Complementary base pairing rule
9. a) Helicase
10. b) thymine