It is important to have cholesterol in your body because ...

[Jkov05]

It is important to have cholesterol in your body because ________.
 
  A) it is the starting material for the building of glycogen
  B) the brain is made almost entirely of cholesterol
  C) it helps break down extra fat lipids in the body
  D) it serves as the starting material for the biosynthesis of most all other steroids

Question 2

In a battery, the following two oxidation-reduction reactions are taking place:
 
  rxn A: Zn + 2 OH-  ZnO + H2O + 2e-
  rxn B: 2 MnO2 + H2O + 2e-  Mn2O3 + 2 OH-
 
  What is undergoing oxidation?
  A) Zn
  B) ZnO
  C) MnO2
  D) H2O
  E) OH-

Question 3

Which of the following is a major advantage of nuclear-fission-based power plants?
 
  A) The amount of energy per kilogram of fuel is greater than any other fuel source.
  B) The byproducts of the fission process are radioactive and have very long half-lives.
  C) The reactors can be used to produce their own fuel.
  D) The power plants are complex and there are many safety requirements to prevent contamination of the environment.
  E) A and C

[Joy Chen]

Answer to Question 1

D

Answer to Question 2

A

Answer to Question 3

E

[Jkov05]

Excellent

[samiel-sayed]

Great answer, keep it coming