What happens to an enzyme after it has catalyzed a reaction?
a. it is sent to the proteasome for degradation
b. it is inactivated by phosphorylation
c. it is inactivated by dephosphorylation
d. it releases the cofactor to get a new one ready for catalysis
e. it returns to its original state
ANSWER: e
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A) primarily producing proteins for secretion B) primarily producing proteins in the cytosol C) constructing an extensive cell wall or extracellular matrix D) digesting large food particles E) enlarging its vacuole
Which one of the following is a glucocorticoid important in both gluconeogenesis (glucose produced from amino acids) during starvation and anti-inflammation?
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Integrins couple the matrix outside a cell to the cytoskeleton inside It.
a. true b. false
What genus is an example of a green alga that grows as a colony?
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