Which is capable of being reduced during either
glycolysis or the Krebs cycle?
a. NAD+
b. FAD +
c. ADP
d. NADH
e. NADP+
Answer: a
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Which of the following statements about gastrin is false?
A. Gastrin secretion is initiated in response to the sight or smell of food. B. A low pH in the stomach inhibits the secretion of gastrin. C. Gastrin stimulates the production of HCl. D. Gastrin is produced by the stomach, absorbed within the small intestine, and recirculated back to the stomach. E. None of these statements about gastrin is false.
A certain infectious disease can cause swellings on the aortic semilunar valve. The valve will then fail to close properly, resulting in ________
A) atherosclerosis B) backflow C) aneurysm D) varicose veins
In eukaryotic cells, transcription occurs
A. on the surface of the plasma membrane. B. on ribosomes. C. inside the nucleus. D. on the surface of the nuclear membrane. E. on spliceosomes.
Why are X-linked recessive genetic disorders more commonly seen in males?
a. For an X-linked disorder to occur, an individual must receive one allele only found on the X chromosome and a second allele found only on the Y chromosome, which females do not have. b. Females must receive two copies of the recessive allele to exhibit the disorder, but males need only one copy. c. The alleles of sex-linked genes are carried only on the Y chromosome, which females do not have. d. Females only have X chromosomes and genes on the X chromosome are not expressed.