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Cellular Energetics and Enzymes Quiz

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Questions and Answers

What is the primary function of catabolic pathways in metabolic processes?

To transform kinetic energy into thermal energy
To release energy by breaking down complex molecules (correct)
To increase the entropy of the universe
To consume energy by building complex molecules

Which type of energy is available for release in a chemical reaction?

Chemical energy (correct)
Potential energy
Thermal energy
Kinetic energy

What is the consequence of a loss in the flow of energy in an organism?

Death (correct)
Transformation of energy into a different form
Increased kinetic energy
Increased entropy

What determines whether a reaction is spontaneous or not?

The free energy change (C) Signup and view all the answers

What is the result of energy transformation according to the second law of thermodynamics?

Increased entropy (disorder) of the universe (D) Signup and view all the answers

What is the definition of metabolism in an organism?

All of the chemical reactions in an organism (C) Signup and view all the answers

What is the primary role of enzymes in chemical reactions?

To lower the activation energy of a reaction without altering ∆G (B) Signup and view all the answers

Which type of inhibitor binds to the active site of an enzyme, preventing the binding of the substrate?

Competitive inhibitor (D) Signup and view all the answers

What is the characteristic of an endergonic reaction?

It consumes energy from the surroundings (A) Signup and view all the answers

What is the effect of increasing the concentration of an enzyme on a reaction?

It increases the rate of the reaction (A) Signup and view all the answers

What is the purpose of the allosteric site on an enzyme?

To bind noncompetitive inhibitors and regulate enzyme activity (B) Signup and view all the answers

Which process is an example of an exergonic reaction?

Cellular respiration (B) Signup and view all the answers

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