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Activation Energy and Chemical Reactions

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Activation Energy and Chemical Reactions

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Questions and Answers

What happens to an enzyme's structure if it is exposed to slightly higher temperatures?

The enzyme becomes more efficient

The enzyme's active sites change shape

The hydrogen bonds may begin to break apart (correct)

The enzyme produces more substrates

Why is a very high fever dangerous to a person in relation to enzymes?

It has no effect on enzyme function

It stabilizes enzyme structure

It enhances enzyme activity

It can cause changes in enzyme structure, leading to loss of function (correct)

What is the specific term for the reactants that an enzyme acts on?

Substrates (correct)

Activators

Inhibitors

Reactives

How do substrates bind to enzymes?

Temporarily at specific active sites Signup and view all the answers

What is a catalyst in relation to chemical reactions?

A substance that decreases activation energy and increases reaction rate Signup and view all the answers

How does a change in pH affect enzymes?

It disrupts hydrogen bonds in enzymes Signup and view all the answers

What is activation energy in a chemical reaction often compared to?

Energy needed to push a rock up a hill Signup and view all the answers

How do enzymes affect chemical reactions in living things?

Decrease the activation energy Signup and view all the answers

What type of molecules are enzymes primarily composed of?

Proteins Signup and view all the answers

How do changes in temperature or pH affect enzyme function?

Inhibit enzyme function Signup and view all the answers

What do enzymes act as in chemical reactions within organisms?

Catalysts Signup and view all the answers

Why do chemical reactions in organisms often require catalysts like enzymes?

To maintain the reaction rate at organism's body temperature Signup and view all the answers