Explain the differences between receptor up-regulation and down-regulation including the conditions

under which a cell would use one rather than the other. What will be an ideal response?


Concepts to Consider: Receptor synthesis versus degradation; target cell sensitivity versus
insensitivity; the insulin receptor

Biology & Microbiology

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Underground stems are called __________, and they may store __________

a. taproots; starch b. taproots; toxins c. tubers; starch d. tubers; toxins

Biology & Microbiology

____ may have been a source of organic monomers on early Earth

a. Venus b. Meteorites c. Volcanoes d. Stromatolites e. Comets

Biology & Microbiology

Peptidoglycan is a compound in

a. bacterial flagella. b. bacterial cell walls. c. archaean cell walls. d. archaean flagella. e. all of these.

Biology & Microbiology

Which scientist described inclusive fitness as the effect an individual has on propagating its alleles through its own reproduction and through kin selection?

A. Darwin B. Hamilton C. Mendel D. Tinbergen E. Wallace

Biology & Microbiology