10. A plot of velocity versus substrate concentration for a simple enzyme-cataly
ID: 210201 • Letter: 1
Question
10. A plot of velocity versus substrate concentration for a simple enzyme-catalyzed reaction This indicates that at some point, the enzyme is produces a A) straight line; inhibited by product B) hyperbolic curve; saturated with substrate C) sigmoidal curve; inhibited by substrate D) hyperbolic curve; activated by substrate E) sigmoidal curve; saturated with substrate 11. Transport of glucose from the intestine into the intestinal cells is accomplished by a(n) This is an example of A) uniporter; passive transport B) uniporter; primary active transport C) symporter; primary active transport D) symporter, secondary active transport E) antiporter, secondary active transport 12. An uncatalyzed reaction has a rate of 4.2 x 10-7 see-1, When an enzyme is added the rate is 3.2 x 10 sec1. Calculate the rate enhancement caused by the enzyme. A) 7.6 x 1010 B) 3.2x 104 C) 1.3 x 10-2 D) 7.4 x 10-3 E) cannot be determined 13. In an -helical protein that spa ns a cell membrane, would likely be in the center of the membrane whilewould likely be associated with the polar head groups and would likely be associated with the aqueous environment A) Trp; Asn; Ala B) Leu; Gin; Asp C) Tyr; Glu; Gly D) Ile; Arg; Gln E) Val; Ser; ThrExplanation / Answer
10. B) hyperbolic curve / saturated with substrate
11. D) symporter / secondary active transport
12. D
13. B)LEU/ GLN / ASP
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