DNA REPLICATION QUIZ

DNA polymerase III

Taq DNA polymerase

None of these

Kornberg enzyme

5' to 5' direction

3' to 3' direction

3' to 5' direction

5' to 3' direction

DNA gyrase

Helicase

Topoisomerases

DNA ligase

All of these

Short fragment of DNA polymerase I

T4 DNA ligase

Taq DNA polymerase

1,00 bases per second

10 bases per second

10,000 bases per second

1,000 bases per second

tetracycline

both (a) and (b)

cephalosporin

nalidixic acid

requires the presence of an enzyme separate from the DNA polymerases

occurs after the synthesis has been completed

occurs in prokaryotes but not eukaryotes

is a function of the 3'-5' exonuclease activity of the DNA polymerases

Occurs only when λ phase has infected E. coli

Always uses T7 DNA polymerase when infected by T7 phage

It occurs in a unidirectional manner

It occurs in bidirectional manner

DnaC

DnaA

all of these

DnaG

at the promoter

at any stretch of DNA that is high in AT pairs

always at the same place

randomly on the chromosome