Since sodium-potassium pumps transport sodium ions out of a cell and potassium ions into a cell, what type of carrier
proteins are they?
a. ion pumps
b. uniporters
c. symporters
d. antiporters
e. ABC transporter
d
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Small interfering RNA (siRNA) regulates gene expression by:
A. inhibiting transcription. B. inhibiting splicing. C. inhibiting translation by binding to RNA transcripts. D. inhibiting translation by degrading RNA transcripts. E. inhibiting rRNA synthesis.
The antibody-mediated immune response is most effective against ____
a. cancer cells b. viral infected cells c. bacteria circulating in the blood d. normal flora e. "self" cells
The definition of phenotypic plasticity is when a single genotype may produce different phenotypes in response to environmental stimuli
a. true b. false
Many people with Marfan syndrome have limbs, fingers, and toes that are disproportionately long in relation to the rest of the body. However, it is the weakened heart valves and damage to the major blood vessels that are often deadly. Which tissue type is weakened with people with this syndrome?