Which of the following statements concerning steroids is FALSE?
a. They can function as hormones.
b. They are exemplified by cholesterol.
c. They consist of four attached carbon rings.
d. They are synthesized from isoprene units.
e. They contain phosphodiester linkages
E
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In which phase of the cell cycle does eukaryotic DNA replication take place?
a. M phase b. G0 c. S phase d. R phase
Necrotizing fasciitis is
A. not treatable with antimicrobial drugs. B. typically a sequelae of streptococcal pharyngitis. C. possibly caused by antibodies to Group A streptococci that cross-react with body tissues. D. associated with strains of Streptococcus pyogenes producing destructive enzymes and toxins. E. also called impetigo.
How does a nucleus in G2 differ from a nucleus in G1?
a. The G2 nucleus has double the amount of DNA as the G1 nucleus. b. DNA synthesis occurs only in the G1 phase. c. Inactive cells are arrested only in the G2 phase. d. During G2, the cell prepares for S phase. e. All of the above
If body cells have too few receptors for insulin, ________
A) the insulin level is likely to decrease B) the blood glucose level may rise to abnormal levels C) the liver will need to break down more glycogen D) more glucagon will be needed