2nd sem: Replication and Repair

Question 1

DNA synthesis confers the where signal in the eukaryotic gene

Answer 1

TATA box

Question 2

which RNA polymerase synthesizes the ribosomal RNA?

Answer 2

RNAP I

Question 3

in prokaryotes the RNA primer is removed by which polymerase

Answer 3

POL I

Question 4

which of the prokaryotic DNA polymerase synthesizes the leading strand

Answer 4

POL III

Question 5

enzyme inhibited by quinolone group of antibiotics

Answer 5

DNA gyrase

Question 6

polymerases synthesize mitochondrial DNA eukaryotic polymerase

Answer 6

gamma

Question 7

what is the lagging strand replicase in eukaryotic DNA polymerase

Answer 7

DELTA

Question 8

the regulatory signals where transcription factors bind is found in what strand of the DNA

Answer 8

coding strand

Question 9

streptomycin inhibits what step in translation

Answer 9

initiation of polypeptide chain synthesis

Question 10

the replication fork is formed by the following sequence of events except

Answer 10

DNA ligase connects to okazaki fragments

Question 11

true regarding replication

Answer 11

the origin of replication is adjacent to a region rich in adenine and thymine

Question 12

the chemical reaction on lysine residues of histones disrupts the nucleosome by decreasing its affinity to DNA

Answer 12

acetylation

Question 13

each codon specifies only one amino acid which means the genetic codes is

Answer 13

unambiguous

Question 14

there is no tRNA with an anticodon for this triplet in the genetic code

Answer 14

UAA

Question 15

what is the function of DnaB protein in prokaryotes

Answer 15

its unwinds short segments of DNA

Question 16

some amino acids may have 2 or more codons because the genetic code is

Answer 16

degenerate

Question 17

the following prevents the seperated strands of the DNA duplex from REANNEALING

Answer 17

SSB

Question 18

in what step of transcription is RNA polymerase is not needed

Answer 18

post transcriptional modification

Question 19

initiation of polypeptide chain synthesis requires this codon

Answer 19

AUG

Question 20

the DNA sequence identifies the transcription start sites in the prokaryotic gene

Answer 20

pribnow box (TATAAT box)