Which of the following possesses both 5'-3' and 3'-5' exonuclease activity? DNA polymerase III Kornberg enzyme Taq DNA polymerase None of these 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 the eukaryotic replication machinery is 1000 times faster than the prokaryotes eukaryotic DNA is always single stranded each chromosome contains multiple replicons TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following repairs nicked DNA by forming a phosphodiester bond between adjacent nucleotides? Helicase DNA ligase Topoisomerases DNA gyrase TRUE ANSWER : ? YOUR ANSWER : ?
During which of the following process a new copy of a DNA molecule is precisely synthesized? Transcription Translation Replication Trasformation TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statements on replication in E.coli is correct? Always uses T7 DNA polymerase when infected by T7 phage It occurs in a unidirectional manner It occurs in bidirectional manner Occurs only when λ phase has infected E. coli TRUE ANSWER : ? YOUR ANSWER : ?
In E.coli, which enzyme synthesizes the RNA primer for Okazaki fragments? all of these DnaG DnaC DnaA TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following enzymes unwind short stretches of DNA helix immediately ahead of a replication fork? Helicases Single-stranded binding proteins Topoisomerases DNA polymerases TRUE ANSWER : ? YOUR ANSWER : ?
DNA replication rates in prokaryotes are approximately of the order of 10 bases per second 10,000 bases per second 1,00 bases per second 1,000 bases per second TRUE ANSWER : ? YOUR ANSWER : ?
DNA gyrase is inhibited by tetracycline both (a) and (b) cephalosporin nalidixic acid TRUE ANSWER : ? YOUR ANSWER : ?
The synthesis of DNA by DNA polymerase occurs in the 3' to 5' direction 5' to 5' direction 3' to 3' direction 5' to 3' direction TRUE ANSWER : ? YOUR ANSWER : ?