For various reasons, your teacher strongly suspects Zack of leaving the food sample. In this lab, you will figure out who was guilty by determining which macromolecules are present in the mystery food sample. Which macromolecules are present in the mystery food sample? Hypothesis If the mystery food is tofu, then it will react with the reagent that indicates the presence of a protein because tofu is primarily protein.

Variables Independent variable: presence of macromolecules, including monosaccharides, polysaccharides, proteins, and lipids

Dependent variable: color changes observed in tests

Who left the food?

Student food maromolecule present
Zack tofu. protein
nicole salad dressing. lipi
christian jelly sandwhich. monosaaccharides
abigal pasta. polysaccharides

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.

In figure 1-2 what is the distance from point b to point c?

Adehydrated patient has high water concentration in her urine and high adh concentration in her blood. which of the following is likely malfunctioning in the patient? a. pituitary gland b. urinary bladder c. kidney tubules d. circulatory system