Glycolysis and the citric acid cycle comprise two different sets of oxidation reactions. The reaction sequence for glycolysis is linear, whereas the reaction sequence for the citirc acid cycle forms a circle
How does this difference in the arrangement of reactions influence the rate of these processes when an excess amount of a single intermediate is added?
Primarily, what is seen is that the citric acid cycle occurs more rapidly after the addition of any one of the intermediates. This means that if one intermediate is added, levels of all of them increase. In glycolysis, the intermediates downstream of the intermediate being added will be affected.
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Which one of the following statements about G-protein coupled receptor-mediated stimulation of adenylate cyclase is notcorrect?
A. Adenylate cyclase is stimulated by GTP-bound G-protein. B. The cAMP generated by adenylate cyclase binds directly to a transcriptional activator. C. The cAMP generated by adenylate cyclase is a second messenger. D. The stimulation of adenylate cyclase is transduced through protein phosphorylation.
In logistic growth, the point at which population growth ceases is referred to as the
A) threshold of security. B) Malthusian parameter. C) saturation point. D) carrying capacity.
Which of the following factors is most strongly reduced with increased forest size?
A) density of nymphs B) percent nymphs infected C) density of infected nymphs D) density of deer infected
Resource partitioning can often be seen in similar species that occupy the same geographic area. These species avoid competition by living in different portions of the habitat or by utilizing different food or other resources. They are referred to as being ________.
A. exploitative B. competitive C. allopatric D. sympatric E. fundamental