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In sickle cell anemia, the basis of the malfunction of the hemoglobin molecule is insufficient iron in the diet

In any reaction catalyzed by an enzyme, the reacting molecule is called: A) substrate      B) cofactor        C) coenzyme      D) isozyme

Below titration curve is for alanine. Find the exact structure of alanine on the location points labeled with 1. 1st location: low pH 1-2.5 2nd location: pH 6-7 3rd location: pH 9-12

In the induced-fit model of enzyme action, the enzyme active site A) stays the same shape during substrate binding.  B) adjusts shape to adapt to the shape of the substrate C) stays the same shape while causing a change in the shape of the substrate. D) uses an inhibitor to adjust its shape for the substrate. E) uses a cofactor to change the shape of a substrate

What is the pI of arginine? pK1=2.83, pK2=8.99, pKR=11.49 A) 41            B) 7.16           C) 10.24           D) 10.74

In the above figure, the solid line shows the dependence of the rate of an enzyme catalyzed reaction v (μmol/min) as a function of the substrate concentration [S] (mM).  Also shown (dotted line) is the dependence of the rate on substrate concentration in the presence of an inhibitor (at a concentration of 2 mM).  On the basis of the graph shown, what type of an inhibition takes place? A) Mixed inhibition B) Non-competitive inhibition C) Uncompetitive inhibition D) Competitive inhibition

Which amino acid is most likely to be found on the interior of a globular protein? A) Aspartate               B) Glycine                    C) Serine                     D) Cysteine

Carbonic anhydrase serves to convert carbon dioxide wastes, produced from cellular respiration, into bicarbonate. This bicarbonate buffers blood pH and allows for the transport of more carbon dioxide equivalents in the blood to the kidneys for excretion. The reaction catalyzed by carbonic anhydrase is: CO2 + H2O ⇌ HCO3- + H+ How would running, as compared to walking, change the pH of the blood if breathing rate remains constant? A) Blood pH will remain the same B) Increased blood Ph C) Decreased blood pH D) None of the above

Which one of the following compounds is a by-product of peptide bond formation? A) phosphate ion        B) bicarbonate               C) water                       D) carboxylic acid

Which pair of amino acids absorbs the most UV light at 280 nm?   A) Ala and Gly B) Trp and Tyr C) Cys ad Asp D) Ala and Phe