DNA Structure and Replication
The rapid appearance of HIV-1 strains that are resistant to AIDS drugs is due in part to which of the following property of its reverse transcriptase?

It lacks a proofreading exonuclease
The RNase H domain of p66 causes error prone synthesis
AZT (zidovudine) is too expensive to be taken in effective doses
It has low affinity for the correct dNTP's

ANSWER DOWNLOAD EXAMIANS APP

DNA Structure and Replication
In a typical electrophoresis experiment, larger fragments of DNA move more

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

ANSWER DOWNLOAD EXAMIANS APP

DNA Structure and Replication
Which of the following is used to determine the appropriate stringency (Wallace rule)?

Tm = 2 x (No.of G:C base pair) + 4 x (No.of A:T base pair)
Tm = 4 x (No.of G:C base pair) + 2 x (No.of A:T base pair)
Tm = 69.3° + 0.41 (%)G+C -650/1
Tm = 4 x (No.of A:T base pair) + 2 x (No.of G:C base pair)

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON DNA Structure and Replication