As part of the nitrogen cycle, bacteria convert certain nitrogen-containing molecules from one type to another. Which stage of the nitrogen cycle does the arrow in the image represent?
A. Nitrogen fixation, in which nitrogen is sunk into the terrestrial reservoir.
B. Nitrification, in which nitrogen is sunk into the atmosphere.
C. Denitrification, in which nitrogen is sunk into the atmosphere.
D. Ammonification, in which nitrogen is sunk into the terrestrial reservoir.

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other

How would you describe an allele that be expressed and determines an organisms appearance? a.uncapitalized b.responsive c.recessive d.dominant

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.