Introduction to Metabolism

Question 1

_______reactions breakdown complex molecules and release energy

Answer 1

catabollc

Question 2

________reactions use energy to build complex molecules?

Answer 2

anabolic

Question 3

1st therm?

Answer 3

energy can be tranferred/transformed but not destroyed

Question 4

2nd therm?

Answer 4

energy transformation or transfer increases entropy of the universe

Question 5

What is free energy?

Answer 5

portion of energy that can perform work

Question 6

When _____changes free energy changes

Answer 6

system

Question 7

if change is g is negative?

Answer 7

reaction is energetically favorable
loss of free energy, more stable final state
exergonic–>energy is exiting

Question 8

change in g is positive?

Answer 8

reaction requires energy

endergonic

Question 9

When does equllibrium occur?

Answer 9

lowest possible g value
state of maximum stability
-any change will require energy therefore systems never spontaneously move away from equillibrium (can do no work)

Question 10

3 types of work in cell?

Answer 10

chem(building polymers)
transport (pumping molecules across membrane)
mechanical

Question 11

What is energy coupling?

Answer 11

use of exergonic to drive endergonic

Question 12

_________immediate source of energy to power cellular work?

Answer 12

ATP

Question 13

What kind of reaction is ATP?

Answer 13

Bonds between phosphate groups broken by hydrolysis

exergonic

Question 14

Couple exo and endo?

Answer 14

what atp hydrolysis does–

overall negative g

Question 15

Reverse reactions must be _________?

Answer 15

endergonic

Question 16

Chemical work: ATP used to create a ____________which is unstable

Answer 16

phosphorylated intermediate

Question 17

How do enzymes work?

Answer 17

lowering the activation energy

Question 18

Starting molecules must be ___________for rxn to occur?

Answer 18

contorted into unstable form