In positive feedback homeostatic mechanisms
a. the response reverses the change.
b. the response intensifies the change.
c. the response occurs before the change.
d. none of the above answers occurs.
d
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The citric acid cycle is a cycle because the starting molecule, _____, is regenerated at the end
A. acetyl-CoA B. oxaloacetate C. fructose 6-diphosphate D. pyruvate E. citrate
Which of the following statements is not true of the formation of N-formylmethionyl-tRNAfMet?
A. It is formed in two successive reactions. B. A formyl group is transferred to methionine before it is added to tRNAfMet. C. The transformylase enzyme most likely recognizes a unique structural feature of tRNAfMet. D. The tRNAfMet is charged by the Met-tRNA synthetase.
If you (incorrectly) proposed that tundra, the world's largest land biome, contains high species richness, your proposal would be consistent with the
A. area hypothesis. B. time hypothesis. C. productivity hypothesis. D. MTE. E. MDE.
Trace the path of a red blood cell from the left ventricle through the body, and back to the left ventricle.
What will be an ideal response?