The upper sandy beach often ends:
a. where sand dunes begin.
b. where terrestrial vegetation begins.
c. at the high tide line.
d. both a and b
e. both b and c
D
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Except that they are not produced in the cytoplasm, conidia produced by Streptomyces spp. are chemically quite similar in composition to endospores produced by Bacillus spp
Indicate whether the statement is true or false.
You are interested in developing an inhibitor for the estrogen receptor. You have identified a molecule that is small and hydrophilic. In a test tube, this inhibitor binds tightly to the estrogen receptor, and inhibits the interaction of the receptor with estrogen. Do you think that this molecule will be an effective inhibitor of the estrogen receptor in cells?
A. Yes, because it can prevent estrogen binding. B. Yes, because it is small. C. No, because it is hydrophilic. D. No, because it will need to bind to the DNA-binding domain to act as an inhibitor.
Beta-N-Methylamino-L-Alanine, or BMAA, is a glutamate receptor agonist produced by cyanobacteria. Since Glu is an excitatory neurotransmitter, it is not surprising that BMAA is associated with neurological damage. Buildup of BMAA in fruit bats was hypothesized to cause neurodegenerative disease in islanders that fed on the bats. A recent study found high levels of BMAA in sharks, suggesting that consumption of shark fin soup is also dangerous. The researchers suggested that a secondary effect of BMAA may actually make these hazardous foods surprisingly desirable. What might this be?
A. Since BMAA is a Glu receptor agonist, it promotes incorporation of Glu into proteins, and has health-promoting effects. B. Since BMAA is derived from cyanobacteria, it provides unique nutrients not found in the animal or plant kingdom. C. Since BMAA is a Glu receptor agonist, it imparts a strong umami flavor that makes food more delicious. D. Since BMAA contains alanine, it improves protein synthesis by providing this rare nutrient. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about glutamate? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Transcription starts at a region of DNA called a(n)
a. sequencer. b. promoter. c. activator. d. terminator. e. transcriber.