AP Biology: Cellular Energetics Quiz

What is the primary characteristic of a spontaneous reaction?

• It releases energy and has a negative delta G.

• It is always endergonic.

• It has a positive delta G.

• It requires a net input of energy.

In an exergonic reaction, how does the energy of the products compare to the reactants?

• The energy of the products is irrelevant.

• The energy of the products is lower.

• The energy of the products is the same.

• The energy of the products is higher.

What role do enzymes play in chemical reactions?

• They change the products of the reaction.

• They are consumed in the reaction.

• They lower the activation energy.

• They increase the activation energy.

What is the term for the enzyme-substrate complex's ability to change shape for binding?

• Allosteric regulation

• Competitive inhibition

• Induced fit

• Lock and key model

Which type of reaction involves building larger molecules from smaller ones?

• Exergonic reaction

• Anabolic reaction

• Catabolic reaction

• Spontaneous reaction

What are cofactors and coenzymes primarily responsible for?

• Changing enzyme structure

• Breaking down enzymes

• Activating enzymes

• Inhibiting enzyme activity

Which of the following is a characteristic of organic molecules?

• They are always inorganic.

• They contain oxygen and hydrogen.

• They are found only in non-living systems.

• They contain only carbon.

What is a catalyst in biological terms?

• A chemical that increases the rate of a reaction without being consumed.

• A molecule that is consumed in a reaction.

• A substance that decreases the rate of a reaction.

• A substance that stops a reaction.

What does the root word 'cata' imply in the context of reactions?

• Forward

• Down

• Up

• Sideways

Which type of reaction is generally associated with breaking down molecules?

• Spontaneous reaction

• Catabolic reaction

• Endergonic reaction

• Anabolic reaction