BIO150 Quiz 3 Chap 1 & 2

Choose the statement that best describe the function of an enzyme.

• Enzyme are proteins that function as catalysts.

• Enzyme control the equilibrium points of reactions.

• Enzymes change the directions of reactions.

• Enzymes cause chemical reactions that would not otherwise take place.

Tags

NGSS.HS-PS1-5

Select the best definition for the optimum temperature of an enzyme.

• The temperature in which enzyme is denatured.

• The temperature in which the maximum number of enzyme-substrate complexed are formed.

• The temperature in which the most collision between enzymes and substrate occurred.

• The temperature in which the active site are occupied at any given time.

Determine the best statement that refers to the induced fit hypothesis of an enzyme.

• The binding of the substrate depends on the shape of the active site.

• The enzyme is like a key fits into substrate, which is a lock.

• As the product released, the enzyme breaks down.

• As the substrate binds to the enzyme, the shape of the enzyme active site changes to accommodate the reaction.

Select a true statement about enzyme inhibition.

• In competitive reversible inhibition, the inhibitor binds to the active site of the enzyme temporarily.

• In non-competitive reversible inhibition, the inhibitor binds to the allosteric site of substrate permanently.

• In competitive reversible inhibition, a poison binds to the enzymes so that it can never work again.

• In competitive irreversible inhibition, the inhibitor binds to the allosteric site of the substrate temporarily.

Suggest the class of enzyme that catalyzes the reaction below.

Glucose + ATP -> Glucose-6-phosphate.

• Lyases

• Isomerase

• Transferase

• Oxidoreductase

Identify the factor that may control the inhibition of enzymatic process during negative feedback.

• Enzyme

• Temperature

• End product

• pH value

Recognize an organic non protein cofactor that binds tightly to an enzyme.

• Prosthetic group cofactor.

• Metal ion cofactor.

• Coenzyme.

• Hydrostatic group cofactor.

Select an enzyme that can work well in acidic solution but not in alkaline solution.

• Amylase

• Trypsin

• Pepsin

• Lipase

indicate the fundamental difference between competitive and non-competitive inhibition of the enzyme.

• The binding site of inhibitor to the enzyme.

• Size of the active site of the enzyme.

• The binding site of substrate to the enzyme.

• Type and size of the inhibitor.

Identify the main function of NAD+ during aerobic respiration.

• It combines with acetyl-CoA at the start of the Krebs cycle.

• It is given off as a by-product during the oxidation of pyruvate.

• It is a major electron carrier in cellular respiration.

• It is the final electron acceptor at the end of the electron transport chain.

Tags

NGSS.HS-LS2-3