3.1 - 3.3 Enzymes

Front

What is the process called when a protein is modified by the addition of a phosphate group?

Back

Phosphorylation

Front

What is the term for the complex formed when an enzyme binds to its substrate?

Back

Enzyme-substrate complex

Front

What type of enzyme inhibition occurs when a compound alters the shape of the enzyme without blocking the active site?

Back

Noncompetitive inhibition

Front

Which statement is NOT true about enzymes?

Back

Enzymes can only be used once in a chemical reaction.

Front

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

Back

Substrate

Front

What is the role of ATP in enzyme activity?

Back

ATP acts as an activator for certain enzymes, such as protein kinases.

Front

What is the active site of an enzyme?

Back

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

Front

What is the effect of temperature on enzyme activity?

Back

Enzyme activity typically increases with temperature up to a certain point, after which it may denature.

Front

What is enzyme denaturation?

Back

The process in which an enzyme loses its functional shape due to external stress, such as heat or pH changes.

Front

What is the difference between competitive and noncompetitive inhibition?

Back

Competitive inhibition occurs when an inhibitor competes with the substrate for the active site, while noncompetitive inhibition occurs when an inhibitor binds to an enzyme at a site other than the active site.