A comet is best known for its visible tail that can even be seen with the naked eye as comets, like Halley’s Comet has a tail at some points during its orbit, but not at other points?

A. As the comet nears the sun, the temperature rises, which causes the tail to appear.

B. As the comet nears the sun, the temperature falls, which causes the tail to appear.

C. As the comet moves away from the sun, the temperature rises, which causes the tail to appear.

D. As the comet moves away from the sun, the temperature falls, which causes the tail to appear.

Penicillin is hydrolyzed and thereby rendered inactive by penicillinase (also known as β-lactamase), an enzyme present in some resistant bacteria. the mass of this enzyme in staphylococcus aureus is 29.6 kd. the amount of penicillin hydrolyzed in 1 minute in a 10-ml solution containing 10-9 g of purified penicillinase was measured as a function of the concentration of penicillin. assume that the concentration of penicillin does not change appreciably during the assay. penicillin(μm) amount hydrolyzed(nmol) 1 0.11 3 0.25 5 0.34 10 0.45 30 0.58 50 0.61 (a) plot v0 versus [s] and 1/v0 versus 1/[s] for these data. does penicillinase appear to obey michaelis-menten kinetics? if so, what is the value of km? (b) what is the value of vmax? (c) what is the turnover number of penicillinase under these experimental conditions? assume one active site per enzyme molecule.