Data analysis aquatic organism ph range for life clam 4.5 - 5.0 snail 5.0 - 9.0 bass 5.5 - 9.0 crayfish 5.5 - 8.5 mayfly 5.5 - 9.0 salamander 6.0 - 8.0 trout 6.0 - 8.5 perch 6.5 - 8.5 frog 7.0 - 9.5 the epa has recommended water quality criteria that include the ph in both freshwater and salt water. the recommended ph range for freshwater is 6.5 to 9.0, and for salt water it is 6.6 to 8.5. in the eastern united states, 75% of the lakes have a ph in the acidic range, from 6.5 to 4.2. based on this new information, what species are most likely to survive in eastern u. s. lakes, if the ph drops and remains at 4.2? a) frogs b) clams and snails c) none of the species would survive d) frogs, perch, trout, salamanders

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.