A temperature-sensitive (ts) mutation is often due to a ________ mutation that affects protein folding or activity.
A) null
B) nonsense
C) missense
D) silent
C) missense
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Fermentation is a process that proceeds without oxygen. Such a process can be described as ________.
Fill in the blank(s) with the appropriate word(s).
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.
Endergonic reactions require the ______ of energy, while exergonic reactions ______ energy.
a. release; input b. input; release c. output; input d. creation; destruction
Imagine you were working on a vaccine against HIV viruses. Which part of the virus particle would you try to target as an epitope for the vaccine?
a. the part that shows the strongest positive selection b. the part that interacts with the host immune system c. the part with the highest mutation rate d. the part that shows the strongest purifying selection