During which of the following process a new copy of a DNA molecule is precisely synthesized? Translation Transcription Trasformation Replication TRUE ANSWER : ? YOUR ANSWER : ?
Proofreading activity to maintain the fidelity of DNA synthesis requires the presence of an enzyme separate from the DNA polymerases occurs in prokaryotes but not eukaryotes is a function of the 3'-5' exonuclease activity of the DNA polymerases occurs after the synthesis has been completed 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 : ? YOUR ANSWER : ?
Which of the following statements on replication in E.coli is correct? It occurs in a unidirectional manner Always uses T7 DNA polymerase when infected by T7 phage It occurs in bidirectional manner Occurs only when λ phase has infected E. coli TRUE ANSWER : ? YOUR ANSWER : ?
DNA gyrase is inhibited by both (a) and (b) cephalosporin nalidixic acid tetracycline 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 : ?
Which of the following lacks 3'-5' exonuclease activity? T4 DNA ligase Taq DNA polymerase Short fragment of DNA polymerase I All of these TRUE ANSWER : ? YOUR ANSWER : ?
The replication of chromosomes by eukaryotes occurs in a relatively short period of time because each chromosome contains multiple replicons eukaryotic DNA is always single stranded the eukaryotes have more amount of DNA for replication the eukaryotic replication machinery is 1000 times faster than the prokaryotes 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 Topoisomerases DNA polymerases Helicases TRUE ANSWER : ? YOUR ANSWER : ?
During DNA replication in prokaryotes, synthesis begins on the circular chromosome at any stretch of DNA that is high in AT pairs at the promoter randomly on the chromosome always at the same place TRUE ANSWER : ? YOUR ANSWER : ?