What is the main difference between aerobic respiration and anaerobic respiration?
a. aerobic respiration requires oxygen to proceed, but anaerobic respiration does not.
b. aerobic respiration occurs during photosynthesis, but anaerobic respiration occurs during cellular respiration.
c. aerobic respiration produces atp, but anaerobic respiration does not.
d. aerobic respiration occurs only in living organisms, but anaerobic respiration occurs in nonliving organisms.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Give examples of selective advantage of organism’s body part/organ

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.