The highest incidence of histoplasmosis in the United States occurs in the
A. Rocky Mountains.
B. Southwest.
C. Northeast.
D. East and Midwest.
E. Southeast.
Answer: D
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Cross bridges can form between actin and myosin when ________
a. troponin is bound to calcium ions b. tropomyosin wraps around actin and covers myosin binding sites c. all of the choices d. calcium pumps transport calcium ions back into the sarcoplasmic reticulum
Built-in checkpoints ____ stop the cell cycle from proceeding if certain conditions are not met
a. before and after G1 phase b. during S phase c. before G2 phase d. before and after S phase e. before anaphase
If AaBb plants self-fertilize, what proportion of the progeny will have exactly one dominant allele?
a. 1/16 b. 3/16 c. 4/16 d. 6/16 e. 8/16
A biochemist wants to control the initial substrate-level phosphorylation that occurs in the tracheal cells of grasshoppers once glucose has crossed the plasma membrane. He has access to the following inhibitors: Rotenone - an electron transport chain inhibitor, Oligomycin - an ATP synthase inhibitor, and TLN-232, an inhibitor of glycolysis. Which inhibitor should he use to slow down initial substrate-level phosphorylation that occurs once glucose has crossed the plasma membrane?
A. Rotenone B. TLN-232 C. Oligomycin D. None of these inhibitors would be effective in preventing substrate-level phosphorylation