Exam 6: DNA Structure, Replication, and Recombination

Repair of heteroduplex regions formed during recombination can result in a 1:3 or 3:1 segregation of parental alleles, which indicates that ________ has occurred.

Meselson and Stahl relied on equilibrium density gradient centrifugation in a ________ solution to resolve the DNA containing ¹⁴N from the DNA containing ¹⁵N.

If you repeated the Hershey and Chase experiment designed to determine the molecule of heredity using a virus with RNA as its genetic material, you would expect that

Which of the following contains single-stranded DNA as its genetic material?

Suppose a region of DNA is 100 bp long.How many unique sequences could it potentially represent?

The group of enzymes able to relax supercoils in DNA is called

Which term describes the ability of a substance to change the genetic characteristics of an organism?

If a cell had a single nonfunctional DNA repair enzyme, how would that cell be affected?

During the S phase of interphase, the state of a eukaryotic chromosome can be described as

Recombination involves the breakage and reunion of DNA molecules from

How does the antiparallel polarity of DNA strands contribute most to the integrity of genetic information?

Suppose the experiment of Meselson and Stahl was performed on a sample of 8 cells, each containing one copy of its circular double-stranded DNA genome, and that had been growing on normal ¹⁴N medium.You then grew the cells for 3 generations in medium containing ¹⁵N.The outcome would be

Site-specific recombination systems, such as Flp recombinase/FRT sites, can function only in a single species.

How many origins of replication does the E.coli chromosome contain?

The nicking of DNA that initiates recombination during mitosis may be due to all of the following EXCEPT

Which of the following is an example of a protein that can read the sequence of DNA without opening the double helix?

DNA is localized mainly in the

Without ________ regions of the DNA during recombination, gene conversion could not occur.

What radiolabeled substance did Hershey and Chase use to label the protein component of the bacteriophage in their study to determine whether protein or DNA was necessary for phage production?

DNA replication occurs through a ________ process.