Cellular respiration in eukaryotic cells requires oxygen. What is this process called?
A) heterotrophic
B) anaerobic
C) prokaryotic
D) aerobic
Ans: D) aerobic
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What role does Na+/K+-ATPase play in salt excretion by the shark rectal gland?
A) Na+/K+-ATPase pumps sodium out and potassium into cells across the apical membrane. B) Na+/K+-ATPase pumps sodium in and potassium out of cells across the apical membrane. C) Na+/K+-ATPase pumps sodium out and potassium into cells across the basolateral membrane. D) Na+/K+-ATPase pumps sodium into and potassium out of cells across the basolateral membrane.
During which days of the ovarian cycle is the oocyte ovulated?
a. 12 - 15 b. 16 - 19 c. 0 - 4 d. 24 - 28 e. 3 - 6
Which description illustrates an amphipathic molecule?
a. A phospholipid with two polar ends b. A phospholipid with two hydrophobic ends c. A phospholipid with only one hydrophilic end
d. A phospholipid with only one hydrophobic end e. A phospholipid with both a hydrophobic end and a hydrophilic end
Nongonococcal urethritis is most commonly caused by
a) Treponema pallidum. b) Haemophilus ducreyi. c) Gardnerella vaginalis. d) Chlamydia trachomatis.