Introduction to Enzymes

What is the primary function of enzymes in biological systems?

• To regulate body temperature

• To store genetic information

• To speed up chemical reactions by lowering activation energy

• To provide structural support

What is the term used to describe the specific location on an enzyme where the substrate binds?

• active site

• attachment site

• substrate site

• binding site

In enzyme kinetics, what does Vmax represent?

• Minimum rate of reaction

• Average rate of reaction

• Initial rate of reaction

• Maximum rate of reaction

What type of enzyme inhibition occurs when the inhibitor binds to the active site of the enzyme?

• Non-competitive inhibition

• Uncompetitive inhibition

• Competitive inhibition

• Allosteric inhibition

What are cofactors in relation to enzyme function?

• Cofactors are only found in plant enzymes.

• Cofactors are the main structural components of enzymes.

• Cofactors are non-protein chemical compounds that assist enzymes in their function.

• Cofactors inhibit enzyme activity.

What effect does competitive inhibition have on enzyme activity?

• Competitive inhibition increases enzyme activity by binding to the active site

• Competitive inhibition has no effect on enzyme activity

• Competitive inhibition decreases enzyme activity by binding to the active site and preventing substrate binding.

• Competitive inhibition changes the enzyme's shape

How do non-competitive inhibitors affect enzyme activity?

• Non-competitive inhibitors decrease enzyme activity by binding to a site other than the active site.

• Non-competitive inhibitors only bind to the substrate.

• Non-competitive inhibitors increase enzyme activity by binding to the active site.

• Non-competitive inhibitors have no effect on enzyme activity.

What is the role of coenzymes in enzyme function?

• Coenzymes are the main structural components of enzymes.

• Coenzymes are non-protein organic molecules that assist enzymes in their function.

• Coenzymes inhibit enzyme activity.

• Coenzymes are only found in animal enzymes.

What is the significance of enzyme specificity in biological reactions?

• Enzyme specificity is not important in biological reactions

• Enzyme specificity allows enzymes to catalyze specific reactions with high efficiency

• Enzyme specificity inhibits the catalytic activity of enzymes

• Enzyme specificity leads to structural instability of enzymes

What does the term "enzyme specificity" refer to?

• Enzymes can catalyze any type of chemical reaction.

• Enzymes can only act on a particular substrate or a group of similar substrates.

• Enzymes require metal ions to function.

• Enzymes can work in any environmental condition.