Posttranslational modification includes
a. cleavage of poly-A tails from mRNA.
b. the binding of miRNAs to mRNA.
c. the chemical modification, processing, and degradation of proteins.
d. chromatin remodeling.
e. splicing of mRNAs.
C
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All of the following will help slow the rate of increase of atmospheric CO2 except:
A. All of the answer options will help slow the rate of increase of atmospheric CO2. B. using solar power instead of fossil fuels to help conserve finite natural resources. C. using nuclear power to reduce the cost of energy production. D. driving more fuel-efficient cars. E. turning off the light in an empty room.
Why doesn't every cell in the body respond to every hormone circulating in the bloodstream?
a. Each cell has a limited number of protein channels that shuttle hormones through its membrane. b. Not all hormones can diffuse through all cell membranes. c. The concentration of some hormones is too low to stimulate every cell. d. Each cell has specific surface receptors, which interact only with hormones that they recognize. e. Although all hormones bind to all cell surfaces, some cells lack second messengers for expression.
The four macromolecules making up our cells allow for the same structure and function across all cells in the body
a. True b. False
The nucleus contains
What will be an ideal response?