Lecture 13 - Enzyme Regulation & Bioenergetics

Question 0

What are the two main types of regulation?

Answer 0

Allosteric regulation

Reversible covalent modification

Question 1

True or false? An unfavorable reaction cannot be driven forward by a favorable reaction

Answer 1

False, it CAN

Question 2

Reversibly bind to regulatory molecules that alter the enzyme activity

Answer 2

Allosteric regulation

Question 3

A group is added to the enzyme to modulate its activity, and this group can be removed to reverse the effects.

Answer 3

Reversible covalent modification

Question 4

The binding of a _________ regulator increases activity in the absence of a __________ regulator increases activity.

Answer 4

Positive

Negative

Question 5

The study of energy transductions in living systems

Answer 5

Bioenergetics

Question 6

What’s the first law of thermodynamics?

Answer 6

Energy may change form, and maybe transported, but energy cannot be created or destroyed.

Question 7

What’s the second law of thermodynamics?

Answer 7

The entropy of the universe will always increase

Question 8

A measure of how far a reaction must go to reach equilibrium, when initial concentrations of each component are 1M, with standard state conditions

Answer 8

Standard free energy change, ΔG’°

Question 9

What does the actual free energy change for a reaction depend on?

Answer 9

On the initial concentrations of substrates and products, and on the temperature.