DNA REPLICATION QUIZ

Which of the following lacks 3'-5' exonuclease activity?

Short fragment of DNA polymerase I

All of these

T4 DNA ligase

Taq DNA polymerase

TRUE ANSWER : ?
YOUR ANSWER : ?

The synthesis of DNA by DNA polymerase occurs in the

5' to 3' direction

3' to 3' direction

3' to 5' direction

5' to 5' direction

TRUE ANSWER : ?
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Both strands of DNA serve as templates concurrently in

none of these

excision repair

replication

mismatch repair

TRUE ANSWER : ?
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The enzyme that catalyzes the synthesis of DNA is called

helicase

DNA polymerase

DNA gyrase

DNA ligase

TRUE ANSWER : ?
YOUR ANSWER : ?

During which of the following process a new copy of a DNA molecule is precisely synthesized?

Replication

Transcription

Trasformation

Translation

TRUE ANSWER : ?
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Which of the following possesses both 5'-3' and 3'-5' exonuclease activity?

Kornberg enzyme

None of these

DNA polymerase III

Taq DNA polymerase

TRUE ANSWER : ?
YOUR ANSWER : ?

The replication of chromosomes by eukaryotes occurs in a relatively short period of time because

eukaryotic DNA is always single stranded

each chromosome contains multiple replicons

the eukaryotes have more amount of DNA for replication

the eukaryotic replication machinery is 1000 times faster than the prokaryotes

TRUE ANSWER : ?
YOUR ANSWER : ?

DNA gyrase is inhibited by

cephalosporin

nalidixic acid

tetracycline

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

During DNA replication in prokaryotes, synthesis begins on the circular chromosome

randomly on the chromosome

always at the same place

at the promoter

at any stretch of DNA that is high in AT pairs

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following statements on replication in E.coli is correct?

It occurs in bidirectional manner

Occurs only when λ phase has infected E. coli

It occurs in a unidirectional manner

Always uses T7 DNA polymerase when infected by T7 phage

TRUE ANSWER : ?
YOUR ANSWER : ?