Which of these hormones is responsible for moving sugar from the bloodstream to cells?
a. ghrelin
b. cholecystokinin (CCK)
c. leptin
d. insulin
Answer: d. insulin
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A common application of dry heat in the microbiology laboratory is to
A. prepare specimens for study. B. sterilize media. C. sterilize plastics. D. sterilize the inoculating loop.
While there are many uses for flow cytometry, a powerful addition to this technique is the ability to further sort, count, and collect individual fluorescent cells, known as fluorescence activated cell sorting (FACS).
Answer the following statement true (T) or false (F)
Which of the following statements about the proteasome is false?
(a) Ubiquitin is a small protein that is covalently attached to proteins to mark them for delivery to the proteasome. (b) Proteases reside in the central cylinder of a proteasome. (c) Misfolded proteins are delivered to the proteasome, where they are sequestered from the cytoplasm and can attempt to refold. (d) The protein stoppers that surround the central cylinder of the proteasome use the energy from ATP hydrolysis to move proteins into the proteasome inner chamber.
)
A. include the skin B. include the mucous membranes C. all contain keratin which makes the barriers highly impervious D. are part of the second line of host defenses E. are all covered with mucus that adds another layer of protection