Bio 1406 Ch. 6

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction by lowering the energy of activation without being consumed in the reaction.

Front

What is catabolism?

Back

The metabolic process that breaks down molecules into smaller units, releasing energy.

Front

What is an exergonic reaction?

Back

A reaction that proceeds with a net release of free energy.

Front

What is the primary function of an enzyme?

Back

To reduce the energy of activation and increase the rate of a reaction.

Front

What does a positive ΔG indicate about a chemical reaction?

Back

The reaction is endergonic, meaning it requires energy input to proceed.

Front

What is metabolism?

Back

The sum of all chemical reactions that occur within a living organism.

Front

What is the difference between anabolism and catabolism?

Back

Anabolism is the process of building up larger molecules from smaller ones, while catabolism is the breakdown of larger molecules into smaller units.

Front

What role does temperature play in chemical reactions?

Back

Increasing temperature generally increases the rate of chemical reactions by providing more energy to the reactants.

Front

What is the significance of pH in cellular reactions?

Back

pH can affect enzyme activity and the rate of biochemical reactions, as enzymes have optimal pH ranges.

Front

What is the relationship between free energy and spontaneity of a reaction?

Back

Reactions with a negative ΔG are spontaneous, while those with a positive ΔG are nonspontaneous.