Which of the following analogies best describes the induced-fit model of enzyme-substrate binding? a. a hug between two people b. a key fitting into a lock c. a square peg fitting through the square hole and a round peg fitting through the round hole of a children’s toy d. the fitting together of two jigsaw puzzle pieces

In drug development, enzyme inhibition studies play a very important role since drugs are often used to target specific enzymes, as illustrated in the example of lovastatin. An important consideration when assessing drug potential is the drug's affinity for the selected target. (The higher the affinity, the better the candidate.) The K₁ is often used in studies to measure the affinity of drug candidates toward their target. Based on your understanding of K₁, which drug would be the BEST candidate for further development? Drug C: K₁= 9.1 x 107 M Drug E: K₁ = 3.5 × 10³ mm Drug D: K₁=5.5 × 10³ μM Drug B: K₁=2.5 × 10 mm Drug A: K₁=4.5 x 10 mm

Which of the following is incorrect about the enzyme chymotrypsin? a. It catalyzes the addition of water across a double bond O b. It is known as a serine protease O c. Artificial substrates are used to monitor the reaction catalyzed by the enzyme d. It is classified as a hydrolase

You design an enzyme assay and choose a substrate concentration equal to the Km of the enzymatic reaction. You measure the rate of the reaction at this substrate concentration to be 75.0 μmol/min. Calculate the Vmax of this reaction in μmol/min. Express your answer with one decimal place.  Your previous attempt suffered from low signal-to-noise ratio when you used a substrate concentration equal to the Km. So you decide to increase the substrate concentration to 0.45 mM. You remeasure the rate of the reaction at this new substrate concentration and find it to be 135.0 μmol/min. Using the same Vmax value found above, calculate the Km value of this enzymatic reaction. Express your answer in μM with one decimal place.  Considering the previous two questions, what would be the rate of the reaction at a substrate concentration of 0.01 mM? Express your answer in μmol/min with one decimal place.