C1.1 Enzymes

Front

What is the pH level of the stomach and why is it important for enzyme activity?

Back

The pH level of the stomach is around 2 due to hydrochloric acid (HCl), which is important for activating the enzyme pepsin that digests proteins.

Front

What happens to pepsin when it enters the small intestine?

Back

Pepsin becomes inactive due to the higher pH levels (7 to 9) in the small intestine.

Front

Which enzyme is known to work best at a pH near 2?

Back

Pepsin works best at a pH near 2.

Front

What is the general purpose of enzymes in biological reactions?

Back

Enzymes speed up chemical reactions by lowering the activation energy.

Front

What is the relationship between enzyme activity and pH?

Back

Enzyme activity typically varies with pH, with each enzyme having an optimal pH range for maximum activity.

Front

What is the role of chymotrypsin in the human body?

Back

Chymotrypsin is an enzyme that catalyzes the digestion of proteins in the small intestine.

Front

What occurs to a substrate after it binds to an enzyme?

Back

After binding to an enzyme, the substrate undergoes a chemical reaction and is converted into a product.

Front

What is the term for the molecule that an enzyme acts upon?

Back

The molecule that an enzyme acts upon is called a substrate.

Front

How does temperature affect enzyme activity?

Back

Temperature can affect enzyme activity; each enzyme has an optimal temperature range where it functions best.

Front

What is denaturation in the context of enzymes?

Back

Denaturation is the process where an enzyme loses its functional shape due to extreme pH or temperature, rendering it inactive.