Repressor proteins
a. prevent binding of RNA polymerase to DNA.
b. cause the DNA regions that contain the operator
to twist or loop.
c. inactivate operon genes when their products are
not required.
d. bind to sets of operators.
e. do all of these.
Answer: e
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The term used to describe ringworm of the nail is:
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Examine the pedigree in the figure above. Individuals affected by the genetic condition in question are indicated by
filled squares or circles. Which inheritance pattern is most likely correct for this condition in this family?
a. autosomal dominant b. X-linked recessive c. X-linked dominant d. cytoplasmic inheritance e. autosomal recessive
Pathogenicity, in viruses, often starts by binding the virus with receptors on the surface of the host cell with high specificity. Once bound, the cell engulfs the viral particles in a vesicle and imports them into the cell. What type of transport is this?
a. secondary active transport b. facilitated diffusion c. receptor-mediated endocytosis d. pinocytosis
What does the "mosaic" part of the fluid mosaic model refer to?
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