A transmembrane protein differs from other membrane proteins because it:
a. completely extends through the membrane.
b. is a glycoprotein with carbohydrates attached.
c. is completely embedded within the membrane.
d. is attached to the inside of the membrane by an ionic bond.
e. is covalently linked to the outer surface of the plasma membrane.
a
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Glucose
A. is preferentially used over lactose in E. coli as a result of catabolite repression. B. levels are directly sensed via catabolite repression. C. levels are the inverse of cAMP levels. D. levels directly affect the production of lactose dehydrogenase. E. is preferentially used over lactose in E. coli as a result of catabolite repression AND glucose levels are the inverse of cAMP levels.
The pseudopods of amoebas and certain other cells
are produced by the action of __________ and motor proteins. a. myosin b. microtubules c. intermediate filaments d. microfilaments e. all of these
The enzyme that digests protein is ____.
A. ghrelin B. chyme C. pepsin D. sulfuric acid E. lipase
The central dogma of biology can be stated as
A. DNA? RNA? proteins. B. RNA? DNA? proteins. C. DNA? proteins? RNA. D. proteins? RNA? DNA.