Blood vessels that return blood from capillaries back to the heart are
(a) arteries.
(b) veins.
(c) portal veins.
(d) arterioles
(b) veins.
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Which of the following have no effective dipole moment?
A. entirely polar molecules B. entirely nonpolar molecules C. proteins D. nucleic acids E. All of these molecules have no effective dipole moment.
Neurotransmitters are stored in vesicles located within axon terminals
Indicate whether the statement is true or false.
Plants provide animals with which of the following?
A) food and oxygen B) food and carbon dioxide C) carbon dioxide D) oxygen E) food
Once a prophage is present in a bacterial genome, viral genes are reproduced every time the bacterium multiplies. Expression of viral genes, however, is inhibited by a repressor protein. Cell stress can induce the formation of proteases that degrade the repressor. What will result?
A. The bacterium will reject the viral genes. B. The virus will enter the lytic cycle. C. The virus will enter the lysogenic cycle. D. The bacterial genome will be denatured.