Viruses possess genetic material comprised of DNA or __________.
A. RNA
B. Plasmids
C. ATP
D. NADPH
E. guanine
Ans: A. RNA
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The plasma membrane Na+/K+-ATPase pump
A. is used to generate sodium and potassium gradients across the membrane. B. is a symporter. C. is a pump for active transport of K+ out of the cell and Na+ into the cell. D. is a pump for facilitated diffusion of K+ into the cell and Na+ out of the cell. E. does not require ATP.
________ is the mating of individuals in the population that are more closely related than expected by random chance
Fill in the blank(s) with correct word
Which is true of predictions about the expected population of the United States in the year 2050?
A) Emigration is expected to have a large effect on the U.S. population. B) The population is expected to grow about 43 percent. C) Immigration is not expected to have a large effect on the U.S. population. D) The U.S. population will exceed 1.5 billion.
Which of the following statements is false?
(a) Proteoglycans can act as filters to regulate which molecules pass through the extracellular medium. (b) The negative charge associated with proteoglycans attracts cations, which cause water to be sucked into the extracellular matrix. (c) Proteoglycans are a major component of compact connective tissues but are relatively unimportant in watery tissues such as the jellylike substance in the interior of the eye. (d) Glycosaminoglycans are components of proteoglycan.