All of these DNA-repair mechanisms use an undamaged complementary DNA strand as a template for replacing the excised nucleotides EXCEPT for
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A person who is HIV-positive and has a helper T (TH) cell co…
A person who is HIV-positive and has a helper T (TH) cell count lower than __________ has AIDS.
A student carries out PCR using the following steps: Step…
A student carries out PCR using the following steps: Step 1: 94°C for 1 minute Step 2: 60°C for 30 seconds Step 3: 72°C for 30 seconds Which of the following lists the CORRECT terms for these three steps?
Which of the following enzyme activities play a role in nucl…
Which of the following enzyme activities play a role in nucleotide-excision repair? Select all that apply.
14[14] 15[15]
14[14] 15[15]
Which of the following DNA repair systems does NOT involve t…
Which of the following DNA repair systems does NOT involve the activity of a DNA polymerase?
The R group for serine is -CH2-OH. In the ionized form, seri…
The R group for serine is -CH2-OH. In the ionized form, serine has the structural formula ________.
Assume that a base-pair substitution mutation converts a DNA…
Assume that a base-pair substitution mutation converts a DNA triplet (AAT) to another DNA triplet (AAA). A second mutation now changes the AAA triplet to the GAA triplet. (UUA and CUU code for leucine and UUU codes for phenylalanine.) This second mutation is an example of a(n):
At a pH < 5, the ionized form for alanine (pI = 6) will have...
At a pH < 5, the ionized form for alanine (pI = 6) will have ________.
PCR (polymerase chain reaction) is an excellent method of ge…
PCR (polymerase chain reaction) is an excellent method of generating copies of target DNA. If a single piece of double stranded DNA (dsDNA) is put into a PCR machine, how many dsDNA segments will there be after 3 rounds?