1. Facilitated diffusion across a membranerequires_________.

a. an energy input, but not a transport protein

b. a transport protein, but not an energy input

c. both a transport protein and an energy input

d. neither an energy input nor a transport protein

2.

Active transport across a membrane requires_________.

a. neither an energy input nor a transport protein

b. an energy input, but not a transport protein

c. both a transport protein and an energy input

d. a transport protein, but not an energy input

3.

Which one of the following statements about living organisms isan implication of the Second Law of Thermodynamics?

a. Living things can convert chemical energy into mechanicalenergy.

b. Living things require an energy input to keep them frombreaking down.

c. Living things can convert one form of chemical energy intoanother form of chemical energy.

d. Living things can convert light energy into chemicalenergy.

4.

Both prokaryotes and eukaryotes possess all of the followingstructures except_____.

a. chromosomes

b. ribosomes

c. a plasma membrane

d. an endoplasmic reticulum (ER)

5.

During the process of transcription_________.

a. RNA nucleotides are base paired with DNA nucleotides

b. DNA polymerase moves along the template strand

c. a ribosome moves along an RNA strand

d. the genetic code is read

6.

A wave of action potentials travels in a single direction down aneuron's axon primarily due to the

a. closing of voltage-gated K+ channels.

b. closing of voltage-gated Na+ channels.

c. inactivation of voltage-gated Na+ channels.

d. inactivation of voltage-gated K+ channels.