Which of these statements does NOT describe a characteristic of the genetic code?
A) The number of codons and amino acids is the same.
B) The code is used by nearly every living organism.
C) Some amino acids have multiple codons.
D) The code is degenerate.
A) The number of codons and amino acids is the same.
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The lungs of mammals are encased in what is specifically referred to as the
A. pleural sac. B. pericardial cavity. C. alveolar cavity. D. bronchial space. E. pharyngeal cavity.
Humans acquire the arbovirus that causes epidemic encephalitis by
A. the fecal-oral route. B. human to human contact. C. contaminated food. D. the bite of an infected mosquito
Glucose moves across continuous capillary walls by what mechanism?
A) primary active transport B) transcytosis C) secondary active transport D) diffusion E) facilitated
Color blindness is caused by an X-linked recessive gene. A color-blind man and a woman with normal vision whose father was color blind have a son. The probability that their son is color blind is:
A) 1.00 (or 100 percent). B) 0.75 (or 75 percent). C) 0.50 (or 50 percent). D) 0.25 (or 25 percent). E) none of these.