Activation Energy and Enzymes

Front

What model describes the specific interaction between an enzyme and its substrate?

Back

The lock and key model.

Front

Enzymes (biological catalysts) work by lowering the _______________ for chemical reactions.

Back

activation energy.

Front

In the context of enzymes, what is a substrate?

Back

The reactant on which an enzyme acts.

Front

What is activation energy?

Back

The minimum energy required for a chemical reaction to occur.

Front

What role do enzymes play in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions by lowering activation energy.

Front

What is the difference between a substrate and a product in enzymatic reactions?

Back

A substrate is the reactant that an enzyme acts upon, while a product is the result of the enzymatic reaction.

Front

What is the significance of the lock and key model in enzyme activity?

Back

It illustrates how specific enzymes fit with specific substrates, ensuring that only certain reactions occur.

Front

What is the induced fit model of enzyme action?

Back

It suggests that the enzyme changes shape slightly to fit the substrate more closely upon binding.

Front

How do temperature and pH affect enzyme activity?

Back

Enzymes have optimal temperature and pH ranges; deviations can reduce activity or denature the enzyme.

Front

What is enzyme denaturation?

Back

The process in which an enzyme loses its functional shape due to external stress, rendering it inactive.