Question

d) release of energy for metabolic activities.

1. which organic molecule is primarily responsible for storing genetic

a) carbohydrates
b) lipids
c) proteins
d) nucleic acids

1. what is the main function of an enzyme?

a) to increase the activation energy of a reaction.
b) to act as a biological catalyst.
c) to be consumed during a reaction.
d) to change the equilibrium of a reaction.

1. the diffusion of water across a selectively permeable membrane is c

a) diffusion.
b) active transport.
c) osmosis.
d) endocytosis.

1. which type of solution would cause an animal cell to swell and poten

a) isotonic
b) hypertonic
c) hypotonic
d) facilitated

1. which of the following processes requires a cell to expend energy (at

a) diffusion
b) osmosis
c) facilitated diffusion
d) active transport

Explanation:

• For question 4, nucleic acids (DNA and RNA) store genetic information.
• For question 5, enzymes act as biological catalysts to speed - up reactions by lowering activation energy.
• For question 6, the diffusion of water across a selectively permeable membrane is osmosis.
• For question 7, in a hypotonic solution, water moves into the animal cell causing it to swell.
• For question 8, active transport requires a cell to expend energy (ATP) to move substances against their concentration gradient.

Answer:

1. d) Nucleic Acids
2. b) To act as a biological catalyst.
3. c) osmosis.
4. c) hypotonic
5. d) Active transport