Introduction to Enzymes

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What are enzymes?

Enzymes are proteins that act as biological catalysts to speed up chemical reactions in the body.

How do enzymes work?

Enzymes work by lowering the activation energy of a reaction, allowing it to occur more easily.

What is the active site of an enzyme?

The active site is the region on an enzyme where the substrate molecules bind and undergo a chemical reaction.

What is meant by enzyme specificity?

Enzyme specificity refers to the selective nature by which an enzyme only catalyzes a specific reaction or set of reactions with particular substrates.

How do temperature and pH affect enzyme activity?

Enzyme activity typically increases with temperature up to a point but can decrease if temperatures are too high; pH levels can affect enzyme shape and function, with each enzyme having an optimal pH.





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1. What are enzymes?

Enzymes are fats that store energy in the body.

Enzymes are proteins that act as biological catalysts to speed up chemical reactions in the body.

Enzymes are carbohydrates used to build cell walls.

Enzymes are nucleic acids that carry genetic information.

2. How do enzymes work?

By lowering the activation energy of a reaction, allowing it to occur more easily.

By increasing the temperature of the reaction area.

By being consumed in the reaction to push it forward.

By decreasing the substrate concentration.

3. What is the active site of an enzyme?

The location where enzymes are synthesized.

The region on an enzyme where the substrate molecules bind and undergo a chemical reaction.

The area in the cell where enzymes are stored.

The part of the enzyme that is embedded in the cell membrane.

4. What is meant by enzyme specificity?

The selective nature by which an enzyme only catalyzes a specific reaction or set of reactions with particular substrates.

The ability of an enzyme to change its shape for any substrate.

The requirement for enzymes to only function at a specific temperature.

The property of an enzyme acting only in a specific cell type.

5. How do temperature and pH affect enzyme activity?

Enzyme activity typically increases with temperature up to a point but can decrease if temperatures are too high; pH levels can affect enzyme shape and function, with each enzyme having an optimal pH.

Enzymes are unaffected by changes in temperature and pH.

Only temperature affects enzyme activity, not pH.

Enzyme activity decreases at higher temperatures and is independent of pH levels.