Suppose that you performed a version of the Hershey and Chase experiment, this time using 32Plabeled
viruses that insert their double stranded DNA into the DNA of the cells that they infect. The
viral DNA is then treated as part of the cell's own DNA and is replicated during DNA replication and
passed on to daughter cells when the cell divides. You infect a population of cells with the 32P-labeled
viruses, then let the infected cells go through two generations of cell divisions. If you then examine the
cells, you should find 32P-labeled DNA in
a. none of them.
b. about of them.
c. about of them.
d. about of them.
e. all of them.
C
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Which structure holds two homologous chromosomes together?
A. centromere B. kinetochore C. polar microtubules D. spindle apparatus E. synaptonemal complex
Semiconservative replication refers to
A. an original parent DNA strand and one newly synthesized DNA strand comprising a new DNA molecule. B. a purine always bonding to a pyrimidine. C. each base bonding at the 1' position of the sugar. D. one helix strand that runs from the 5' to 3' direction and the other strand that runs from the 3' to 5' direction.
Which of the following allows water to move much faster across cell membranes?
A) the sodium-potassium pump B) ATP C) peripheral proteins D) aquaporins
Which type of DNA analysis is likely to be most effective when analyzing the ancient remains of a mummified body?
A. analysis of cDNA B. analysis of short tandem repeats C. whole genome sequencing D. analysis of mitochondrial DNA