Lecture 13 - Enzyme Regulation & Bioenergetics Flashcards

0
Q

What are the two main types of regulation?

A

Allosteric regulation

Reversible covalent modification

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1
Q

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

A

False, it CAN

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2
Q

Reversibly bind to regulatory molecules that alter the enzyme activity

A

Allosteric regulation

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3
Q

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

A

Reversible covalent modification

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4
Q

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

A

Positive

Negative

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5
Q

The study of energy transductions in living systems

A

Bioenergetics

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6
Q

What’s the first law of thermodynamics?

A

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

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7
Q

What’s the second law of thermodynamics?

A

The entropy of the universe will always increase

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8
Q

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

A

Standard free energy change, ΔG’°

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9
Q

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

A

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

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