Chapter 5 - Enzyme and Kinetics

Which of the following is true about endergonic reaction?

• The chemical reaction are nonspontaneous

• Reactant have higher energy than product

• It is a chemical reaction that consumes energy

• Large amount of energy are required to start the reaction

Graph shows two chemical reaction, one without enzyme and one with enzyme.

Which of the following shows the activation energy for the chemical reaction with enzyme?

• P

• Q

• R

• S

The specific region on the enzyme that binds the substrate is

• allosteric site

• active site

• transition site

• enzyme-substrate complex

Substrate is held in the active site by (choose more than one answer)

• covalent bond

• ionic bond

• hydrogen bond

• disulfide linkage

According to induced fit model,

• binding of substrate will change the substrates conformation

• the active site is complementary to the substrate

• the active site is flexible and are able to change conformation

• strong bonds will bind the substrate in the active site

Which of the following is true about prosthetic group (cofactor)?

• It is an organic cofactor

• It binds loosely to the enzyme

• It serve as catalytic center for enzyme

• Example is zinc and iron ions

Which statements is about competitive inhibitor?

• Binds to the allosteric site of enzyme

• Binds permanently to the enzyme

• The effect of enzyme can be overcome by adding more substrates

• It will cause denaturation of enzyme

Which of the following is false about the enzyme regulation shown in diagram?

• It is showing feedback inhibition

• It is important to prevent wastage of chemical resources

• D will bind to enzyme 1 permanently

• D will bind to the allosteric site of enzyme 1

An enzyme that transfers a phosphate group from one compound to another is a/ an

• oxidoreductase

• transferase

• isomerase

• lyase

The following are the advantages of immobilize enzyme technology except

• allow multiple use of enzymes

• can rapidly stops reaction

• product not mixed with enzymes

• increase yield of products