DNA STRUCTURE AND REPLICATION QUIZ

Leading strands

Replication origins

Replication forks

Okazaki fragments

Dehydration

Formation of thymine dimers

Depurination

Single strand break

nickase activity

endonuclease activity

exonuclease activity

no activity

AZT (zidovudine) is too expensive to be taken in effective doses

It lacks a proofreading exonuclease

The RNase H domain of p66 causes error prone synthesis

It has low affinity for the correct dNTP's

dismantle RNA primer

cleave and unwinds short sections of DNA ahead of the replication fork

proofread base pairing

synthesize an RNA primer to begin the elongation process

Erythromycin

Tunicamycin

All of these

Bleomycin

G2 and M phases

G1,S, G2 and M phases

G1, G2 and M phases

S, G2 and M phases

neither chromatid was labeled

both chromatids of a chromosome were labeled

only one chromatid of a chromosome was labeled

both (a) and (b)

quickly, so they appear nearer the bottom of a gel photograph

slowly, so they appear nearer the bottom of a gel photograph

slowly, so they appear nearer the top of a gel photograph

quickly, so they appear nearer the top of a gel photograph

Saccharomyces cerevisiae

Xenopus laevis

Strongylocentrotus purpuratus

Arabidopsis thaliana