DNA Structure and Replication
The replication of a linear DNA molecule in a eukaryotic chromosome creates a problem which is reported to be sorted out by

None of these
using RNA as a template
using enzyme called telomerase
shortening of the double stranded replicated portion

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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
AZT (zidovudine) is too expensive to be taken in effective doses
The RNase H domain of p66 causes error prone synthesis
It lacks a proofreading exonuclease

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