Some science questions....help? (explanations would help)?

Question

1. Starch and Glycogen are:

a) used directly and immediately as energy sources for living systems

b) composed of surface subunits

c) polysaccharides with chains of equal length, but composed of different subunits.

d) found in roots of most plants

e) not found in, or produced by the same type of organism.

2. Insulin is the best categorized as a:

a) protein

b) carbohydrate

c) lipid

d) nucleic acid

e) cholesterol

3. Which of the following are important structural components of animal cell membranes?

a) chitin and glycogen

b) cellulose and chitin

c) starch and glycogen

d) phospholipids

e) nucleic acids

4. Lipid split apart from fatty acid chains in a reaction known as:

a) hydrolysis

b) dehydration synthesis

c) dissociation

d) sulfur bonding

Answer 1

see answer #1, I think it is correct

Answer 2

1.starch is found in plants and glycogen in animals, so E

both are formed from sugar subunits

2. insulin is a protein, A

3. phospholipids, D

4. hydrolysis, A

Answer 3

1.  E) not found in, or produced by the same type of organism

2. A, protein

3. D, phospholipids

4.  C, dissociation (I think)