DNA Structure and Replication
The size of a linear DNA fragment in a gel can be estimated by

comparison with a molecular weight standard such as Hind III digested phage lambda
the time it takes the gel to run
fluorescence in UV light
the sedimentation coefficient

ANSWER DOWNLOAD EXAMIANS APP

DNA Structure and Replication
Taylor, Woods and Hughes labeled Vicia DNA by allowing new DNA synthesis in the presence of radioactive thymine. After DNA replication (S phase of the cell cycle), it was observed that

both chromatids of a chromosome were labeled
neither chromatid was labeled
both (a) and (b)
only one chromatid of a chromosome was labeled

ANSWER DOWNLOAD EXAMIANS APP

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 has low affinity for the correct dNTP's
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

ANSWER DOWNLOAD EXAMIANS APP