Understanding Enzymes and Their Functions

What type of biological molecule are enzymes?

• Carbohydrates

• Proteins

• Lipids

• Nucleic acids

What happens to enzymes during chemical reactions?

• They are used up and cannot be reused

• They are used up but can be reused

• They are not used up and can be reused

• They are not used up and cannot be reused

What is the specificity of enzymes?

• Each enzyme can bind to any substrate

• Each enzyme is specific to one type of substrate

• Each enzyme can bind to multiple substrates

• Each enzyme is specific to two types of substrates

How do enzymes affect the activation energy of a chemical reaction?

• They increase the activation energy

• They decrease the activation energy

• They have no effect on the activation energy

• They eliminate the need for activation energy

Where does the substrate bind on an enzyme?

• The allosteric site

• The active site

• The binding site

• The catalytic site

What effect does high temperature have on enzymes?

• It enhances their function

• It denatures them, making them lose their function

• It has no effect on their function

• It makes them more specific

How can changes in pH affect enzyme activity?

• They have no effect on enzyme activity

• They can enhance enzyme activity

• They can alter enzyme activity by affecting the shape of the enzyme or its active site

• They can make enzymes more specific

At what temperature do enzymes typically work best?

• Cold temperatures

• High temperatures

• Moderate temperatures

• Extreme temperatures

Which model describes how enzymes bind to specific substrates?

• The induced fit model

• The lock-and-key model

• The random binding model

• The substrate-enzyme model

What can extreme heat or other extreme conditions do to enzymes?

• Enhance their activity

• Denature them

• Make them more specific

• Have no effect