Exam 15: Dna and the Gene: Synthesis and Repair

Within a double-stranded DNA molecule, adenine forms hydrogen bonds with thymine and cytosine forms hydrogen bonds with guanine. This arrangement ________.

The leading and the lagging strands differ in that ________.

Given the damage caused by UV radiation, the kind of gene affected in those with XP is one whose product is involved with ________.

In an analysis of the nucleotide composition of DNA, which of the following will be found?

Refer to the figure associated with this question. Which structure is responsible for stabilizing DNA in its single-stranded form?

Eukaryotic telomeres replicate differently than the rest of the chromosome. This is a consequence of which of the following?

What appears to be a dark side to telomerase activity with regard to human health?

Which of the following cells have reduced or very little active telomerase activity?

Which of the following would be LEAST likely to cause DNA damage to an individual suffering from xeroderma pigmentosum (XP)?

Of the following, which is the most current description of a gene?

Put the following steps of DNA replication in chronological order. 1) Single-stranded binding proteins attach to DNA strands. 2) Hydrogen bonds between base pairs of antiparallel strands are broken. 3) Primase binds to the site of origin. 4) DNA polymerase binds to the template strand. 5) An RNA primer is created.

Which of the following would you expect of a eukaryote lacking telomerase?

What provides the energy for the polymerization reactions in DNA synthesis?

In E. coli, what is the function of DNA polymerase III?

Which one of the following is LEAST likely to cause mutations in DNA?

At a specific area of a chromosome, the following sequence of nucleotides is present where the chain opens to form a replication fork: 3' C C T A G G C T G C A A T C C 5' An RNA primer is formed starting at the underlined T (T) of the template. Which of the following represents the primer sequence?

How does the enzyme telomerase meet the challenge of replicating the ends of linear chromosomes?

The epsilon (ε) subunit of DNA polymerase III of E. coli has exonuclease activity. How does it function in the proofreading process? The epsilon subunit ________.

The DNA of telomeres has been highly conserved throughout the evolution of eukaryotes. This most likely reflects ________.

What is a telomere?