Carbonic anhydrase in red blood cells:a
removes oxygen from the erythrocyte.
b. carries carbon dioxide in the erythrocyte.
c. converts carbon dioxide to carbonic acid.
d. increases the pH of the blood.
e. increases the permeability of the capillary to carbon dioxide.
c
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Which is/are a function(s) of the cytoplasmic membrane in prokaryotes?
A) It functions as a permeability barrier. B) It is an anchor for many proteins involved in bioenergetic reactions and transport. C) It is a major site of energy conservation. D) It serves as a permeability barrier, a docking station for proteins involved in bioenergetics reactions and transport, and a site for energy conservation.
Which of the following is not an accurate statement describing the contributions of researchers to the structure of DNA?
A. Erwin Chargaff determined that the percent of adenine was equal to the percent of thymine and the percent of guanine was equal to the percent of cytosine. B. Watson and Crick used the work of previous researchers, including Chargaff and Franklin to determine the overall structure of DNA with sugar and phosphate components making up the strands with the nitrogenous bases in the interior. C. Rosalind Franklin used X-ray crystallography to determine that DNA was a double helix in shape. D. Alfred Hershey and Martha Chase injected viruses into mice to determine that the inheritable material was DNA and not protein.
Which polysaccharide is an important component in the structure of many animals and fungi?
A) chitin B) cellulose C) amylopectin D) amylose
An erection of the penis results most directly from:a
the bone present in the penis. b. dilation of the veins leading from the penis. c. contraction of the muscles within the penis. d. dilation of the arteries in the penis. e. a blocking of enzymes within the penis