Viral proteins can damage host cells by:
a. increasing the rate of fermentation within the host.
b. producing endotoxins.
c. causing a decline in coordination and increased irritability.
d. preventing transcription of viral nucleic acids.
e. overwhelming the host cell with a large number of viruses.
E
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The ________ is comprised of the fluid portion of the cell and contains the organelles.
Fill in the blank(s) with the appropriate word(s).
Most cells in the body are in prophase.
a. true b. false
carbon in soil
What will be an ideal response?
Which of the following statements about aromatic amino acids is correct?
A) All are strongly hydrophilic. B) Histidine's ring structure results in its being categorized as aromatic or basic, depending on pH. C) On a molar basis, tryptophan absorbs more ultraviolet light than tyrosine. D) The major contribution to the characteristic absorption of light at 280 nm by proteins is the phenylalanine R group. E) The presence of a ring structure in its R group determines whether or not an amino acid is aromatic.