DNA Structure

Which of the following nucleosides would be found on an RNA strand?

How many purines are found in the DNA strand below?

GTTAGTGTCCCGA

How many pyrimidines would be found in DNA complementary to the strand shown below?

TGTTCAGC

Removal of which of the following bases from a site along DNA would NOT produce an apyrimidinic site?

A double-stranded DNA helix is found to contain 30% adenosine. What percentage of guanine does it contain?

Helicase unwinds a double-stranded DNA separating the two strands into single strands by disrupting:

Exonucleases cleave off one nucleotide at a time from either the 3′ end or 5′ end of a strand of DNA by breaking:

Which of the following DNA strands would have the highest melting temperature?

According to the data below what is the melting temperature of the strand that was tested?

Which of the following is true of heterochromatin?

I) It is highly transcribed
II) It is highly condensed
III) Histones in this region of DNA are mostly deacetylated

If a gene is frequently expressed where would you expect to see that gene?

When histones are deacetylated DNA binds more tightly to histones converting:

Which of the following is true of euchromatin?

A scientist is trying to increase gene expression in a chromosomal region containing predominately heterochromatin. Which enzyme should they add to an experimental setup to make this occur?

Telomeres are found:

If the centromere region of a chromosome was deleted which of the following process would be inhibited?

Both telomeres and centromeres are:

Taxanes a class of microtubule inhibitors would interfere with microtubules interaction with:

Alphaloid DNA comprises the centromere of eukaryotic cells. You would expect to find alphaloid DNA in: