Chemistry of Life

Question 1

What shell do electrons fill first?

Answer 1

The inner shell

Question 2

How many electrons can the valence shell typically hold?

Answer 2

8

Question 3

Which elements of CHON have the highest electronegativity?

Answer 3

Oxygen and nitrogen

Question 4

Hydrogen bonds form between a hydrogen and what type of molecule?

Answer 4

Partial negative charge

Question 5

What does amphipathic mean?

Answer 5

A molecule has polar and non-polar regions

Question 6

Rank by ability to diffuse
Ions; hydrophobic; large uncharged polar; small uncharged polar

Answer 6

1. Hydrophobic
2. Small, uncharged, polar
3. Large, uncharged, polar
4. Ions

Question 7

What does cholesterol do in membranes?

Answer 7

Increases fluidity

Question 8

What effect do unsaturated fatty acids have on a membrane?

Answer 8

Increase fluidity

Question 9

What is the only factor that determines the rate of reaction?

Answer 9

Activation energy

Question 10

What is the formula for change in free energy?

Answer 10

Delta G = Delta H - T Delta S
Change in free energy = change in enthalpy - temperature x change in entropy