Biology, 06.05.2020 03:25 brianabrady06
The cholera toxin, an AB exotoxin, attaches an ADP-ribose group to the host's stimulatory G factor (Gs). The normal function of Gs is to stimulate the host's adenylate cyclase, which produces the second messenger molecule cAMP. This toxin-mediated ADP-ribosylation of Gs has which of the following effects?a. inactivation of Gs, causing a decrease in cAMP levels and resulting in decreased ion transport from the infected host cell. b. constant activation of Gs, causing an increase in cAMP levels and resulting in decreased ion transport from the infected host cell. c. inactivation of Gs, causing a decrease in cAMP levels and resulting in increased ion transport from the infected host cell. d. constant activation of Gs, causing an increase in cAMP levels and resulting in increased ion transport from the infected host cell.
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Biology, 22.06.2019 00:30
If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?
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Biology, 22.06.2019 11:30
Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.
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Biology, 22.06.2019 12:20
Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water
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The cholera toxin, an AB exotoxin, attaches an ADP-ribose group to the host's stimulatory G factor (...
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