Metabolism I Flashcards Preview

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Flashcards in Metabolism I Deck (13)
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1
Q

What’s ATP?

A

Energy currency of the cell.

Used to perform 3 types of cellular work:
1. Chemical work
2. Transport work
3. Mechanical work

2
Q

What causes the energy release when a phosphate group is released from ATP?

A

Due to the repulsion between negative charges the phosphate groups carry, energy is released when the bond is cleaved off

3
Q

How is ATP produced?

A

Using energy that arises from catabolic reactions in the cell

4
Q

What’s a catabolic reaction?

A

Reactions which release energy

5
Q

What are anabolic reactions?

A

Reactions that require energy

6
Q

When reaction reaches equilibrium, what happens to the delta G value

A

Reaches 0.
When the delta G value is 0, it means the cell is dead

7
Q

Do catabolic reactions happen in one step or via a series of small steps,

A

Series of small steps

8
Q

What’s allosteric regulation?

A

Function of one site of an enzyme is affected by the binding of a regulatory molecule at a different site

9
Q

What are 2 types of regulatory molecules?

A

Inhibitor + Activator

10
Q

What does an activator do to the shape of an enzyme?

A

Makes it better (make catalysis easier)

11
Q

What does an inhibitor do to the shape of an enzyme?

A

Makes it worse

12
Q

Do allosteric enzymes have more than one subunit?

A

Yes, each subunit has its own active site that may be active or inactive

13
Q

Does the change in shape of one subunit affect the other subunits?

A

Yes.
Sort of like in a ‘follow the leader’ format