A protein containing more than one polypeptide chain exhibits the ________ level of protein structure
A) primary
B) secondary
C) tertiary
D) quaternary
Answer: D
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In some cases the DNA lesion is bypassed by the DNA polymerase, leaving a gap that is single-stranded and contains the lesion. Since the gap is single-stranded the lesion cannot be repaired
Which of the following is not a feature of the repair of such gaps? A. The 3' single-strand overhang invades the intact portion of the chromosome, pairs with its complementary strand, and displaces the other. B. Strand invasion occurs by the intact, lesion-containing strand. C. Branch migration generates two Holliday junctions. D. The displaced, undamaged strand is replicated. E. Holliday intermediates are cleaved by resolvases.
Mutation can be defined as the addition of genetic variation that increases the hereditary diversity of a population.
a. true b. false
Process by which substances are moved into the cell from the environment; includes phagocytosis, pinocytosis, and receptor-mediated endocytosis.
What will be an ideal response?
The process of assembling a new or improved biochemical pathway to make products or to degrade toxic compounds is
a. protein fusion. b. operon fusion. c. pathway engineering. d. gene mining.