An enzyme, citrate synthase, in the Krebs cycle is inhibited by ATP. This is an example of all of the following EXCEPT
A) allosteric inhibition.
B) competitive inhibition.
C) feedback inhibition.
D) noncompetitive inhibition.
B
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The letter “A” in the above figure represents
a. ground tissue. b. dermal tissue. c. vascular tissue. d. apical meristem. e. shoot root combination.
Sodium-potassium pumps maintain an electrochemical gradient
__________________ Indicate whether the statement is true or false.
Due to a rapid change in the environment, a population of ants was reduced from 1 million to 1
thousand. What type of genetic drift will occur in the gene pool of this population when it expands again? a. the founder effect b. migration c. a genetic bottleneck d. gene flow e. natural selection
BOTH hypotheses on the origins of eukaryotes agree that
a. eukaryotic cells are chimeras with attributes of Archaea and Bacteria. b. the nucleated cell arose after the endosymbiosis event. c. the nucleated cell arose before the endosymbiosis event. d. the nucleated cell was a direct descendant of a bacterial cell.