Metabolism I

Question 1

What’s ATP?

Answer 1

Energy currency of the cell.

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

Question 2

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

Answer 2

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

Question 3

How is ATP produced?

Answer 3

Using energy that arises from catabolic reactions in the cell

Question 4

What’s a catabolic reaction?

Answer 4

Reactions which release energy

Question 5

What are anabolic reactions?

Answer 5

Reactions that require energy

Question 6

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

Answer 6

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

Question 7

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

Answer 7

Series of small steps

Question 8

What’s allosteric regulation?

Answer 8

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

Question 9

What are 2 types of regulatory molecules?

Answer 9

Inhibitor + Activator

Question 10

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

Answer 10

Makes it better (make catalysis easier)

Question 11

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

Answer 11

Makes it worse

Question 12

Do allosteric enzymes have more than one subunit?

Answer 12

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

Question 13

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

Answer 13

Yes.
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