What are the products made during glycolysis?
A) 2 pyruvic acid
B) 4 ATP (net gain of 2 ) and 2 NADH and 2 pyruvic acid
C) 2 NADH
D) 4 ATP (net gain of 2 ) and 2 NADH
E) 4 ATP (net gain of 2 )
Answer: B
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Based on your understanding of the ways in which signal transmission mediates cell function, which of the following predictions is most consistent with the information given above?
(A) In an environment with low fixed nitrogen, treating the Anabaena cells with a calcium-binding compound should prevent heterocyst differentiation. (B) A strain that overexpresses the patS gene should develop many more heterocysts in a low fixed nitrogen environment. (C) In an environment with abundant fixed nitrogen, free calcium levels should be high in all cells so that no heterocysts develop. (D) In environments with abundant fixed nitrogen, loss of the hetR gene should induce heterocyst development.
The pathogenesis of poststreptococcal glomerulonephritis involves:
A. deposition of immune complexes in the kidneys. B. destruction of glomeruli by streptolysin O. C. bacterial-induced dehydration. D. invasion of the kidneys by Streptococcus pyogenes
Choose the answer that best fits the following statement: Cholesterol is an essential component of biological membranes
Although it is much smaller than the typical phospholipids and glycolipids in the membrane, it is a(n) _________________ molecule, having both hydrophilic and hydrophobic regions. (a) polar (b) oxygen-containing (c) hydrophobic (d) amphipathic
The presence of a loop of Henle in nephrons is an evolutionary adaptation that enables mammals and birds to reabsorb water efficiently and produce a ________ urine.
A. hypertonic B. hypotonic C. isotonic D. osmolar