AQA A Level Biology Enzymes

What is the structure of enzymes?

• Enzymes are made of carbohydrates

• Enzymes are typically proteins with a specific three-dimensional structure.

• Enzymes have no specific structure

• Enzymes are only found in plants

What is enzyme-substrate specificity?

• Enzyme-substrate specificity is the ability of an enzyme to select any substrate and catalyze any reaction.

• Enzyme-substrate specificity is the ability of an enzyme to select its specific substrate but not catalyze a specific reaction.

• Enzyme-substrate specificity is the inability of an enzyme to select its specific substrate and catalyze a specific reaction.

• Enzyme-substrate specificity refers to the ability of an enzyme to select its specific substrate and catalyze a specific reaction.

How do enzymes interact with substrates?

• Enzymes ignore substrates and have no interaction with them

• Enzymes consume substrates without any interaction

• Enzymes interact with substrates through a process called enzyme-substrate complex formation, where the enzyme binds to the substrate and facilitates the chemical reaction.

• Enzymes repel substrates to prevent chemical reactions

How does temperature affect enzyme activity?

• Temperature can affect enzyme activity by either increasing or decreasing the rate of reaction. Generally, as temperature increases, enzyme activity also increases up to a certain point, after which the enzyme denatures and activity decreases.

• Enzyme activity decreases with temperature

• Enzyme activity always increases with temperature

• Temperature has no effect on enzyme activity

What is enzyme inhibition?

• Enzyme inhibition has no effect on enzyme activity

• Enzyme inhibition only occurs in plants

• Enzyme inhibition is the process where a molecule binds to an enzyme and decreases its activity.

• Enzyme inhibition is the process of increasing enzyme activity

What are the different types of enzyme inhibition?

• Single, double, triple, and quadruple inhibition

• Competitive, non-competitive, uncompetitive, and mixed inhibition.

• Fast, slow, medium, and rapid inhibition

• Acidic, basic, neutral, and alkaline inhibition

How does competitive inhibition work?

• Competitive inhibition works by enhancing the activity of the enzyme

• Competitive inhibition works by increasing the binding of the substrate to the enzyme

• Competitive inhibition works by blocking the active site of an enzyme, preventing the substrate from binding and reducing the enzyme's activity.

• Competitive inhibition works by deactivating the enzyme completely