Which of the following repairs nicked DNA by forming a phosphodiester bond between adjacent nucleotides? DNA gyrase DNA ligase Topoisomerases Helicase TRUE ANSWER : ? YOUR ANSWER : ?
The replication of chromosomes by eukaryotes occurs in a relatively short period of time because the eukaryotes have more amount of DNA for replication each chromosome contains multiple replicons the eukaryotic replication machinery is 1000 times faster than the prokaryotes eukaryotic DNA is always single stranded TRUE ANSWER : ? YOUR ANSWER : ?
Both strands of DNA serve as templates concurrently in excision repair none of these replication mismatch repair TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following enzymes unwind short stretches of DNA helix immediately ahead of a replication fork? Single-stranded binding proteins Helicases DNA polymerases Topoisomerases TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following possesses both 5'-3' and 3'-5' exonuclease activity? DNA polymerase III None of these Kornberg enzyme Taq DNA polymerase TRUE ANSWER : ? YOUR ANSWER : ?
During which of the following process a new copy of a DNA molecule is precisely synthesized? Translation Transcription Replication Trasformation TRUE ANSWER : ? YOUR ANSWER : ?
The enzyme that catalyzes the synthesis of DNA is called DNA gyrase DNA ligase helicase DNA polymerase TRUE ANSWER : ? YOUR ANSWER : ?
DNA gyrase is inhibited by tetracycline cephalosporin both (a) and (b) nalidixic acid TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following lacks 3'-5' exonuclease activity? All of these Taq DNA polymerase Short fragment of DNA polymerase I T4 DNA ligase TRUE ANSWER : ? YOUR ANSWER : ?
Proofreading activity to maintain the fidelity of DNA synthesis is a function of the 3'-5' exonuclease activity of the DNA polymerases occurs after the synthesis has been completed occurs in prokaryotes but not eukaryotes requires the presence of an enzyme separate from the DNA polymerases TRUE ANSWER : ? YOUR ANSWER : ?