When a vesicle fuses with the plasma membrane the contents of the lumen of the vesicle are:
a. Ligands that enter the nucleus.
b. Ligands that become the part of the plasma membrane.
c. Ligands that are used in cell communication.
d. Two of the above.
e. Part of the nuclear pore complex.
Ans: c. Ligands that are used in cell communication.
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Erythromycin is put in the eyes of newborns specifically to prevent
A) syphilis. B) gonorrhea. C) a chlamydial infection. D) ocular herpes.
How does the Tax protein contribute to the increased growth rate of white blood cells?
a. It stabilizes the CREB dimers that bind to the CRE DNA sequence. b. It inhibits the ability of CREB to bind to DNA. c. It phosphorylates the CREB activator protein. d. It allows CREB to bind the CRE-like viral enhancer. e. It stimulates the production of cAMP in a cell.
In a trait with multiple alleles, an individual carries ____________________ (how many?) alleles of
the gene. Fill in the blank(s) with the appropriate word(s).
What potential consequence on the cardiovascular system may result from smoking?
A) an increase in the production of HDL B) a decrease in the production of LDL C) a higher risk of atherosclerosis D) an increase in the risk for lung cancer