The cells produced by mitotic divisions are considered to be ____ the original cell
a. smaller versions of
b. genetically unique from
c. clones of
d. mutants of
e. plasmids of
ANSWER: c
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Acyclovir is an antiviral chemical that resembles a nucleotide but lacks a 3' OH group and cannot form phosphodiester bonds. Why is Acyclovir useful in treating some viral infections?
A. Acyclovir stops viral protein synthesis. B. Acyclovir halts viral DNA replication. C. Acyclovir blocks the assembly of viral cell capsules. D. Acyclovir hydrolyzes viral polysaccharides.
How do sphagnum mosses contribute to the carbon cycle? Select all correct choices
A. As decomposers, they release large amounts of CO2 into the atmosphere. B. They produce phenols, which release the carbon stored in peat bogs. C. As heterotrophs, they remove large amounts of CO2 from the atmosphere. D. They produce protons, which limit decomposition and CO2 production in peat bogs.
A newly defined autoimmune disorder has resulted in an immune response against Type V collagen fibers. As a result, the most likely organ to be targeted in this response would be the
A) skin. B) heart. C) lungs. D) stomach. E) tongue.
The oxygen level in the pulmonary arteries is most similar to that in the ________.
A. aorta B. peripheral veins