Biology Review Sheet

1.
In the plasma membrane, the phospholipid heads
A) are hydrophobic and face outward towards the aqueous solution on both sides of the membrane
B) are hydrophilic and face inward, shielded from water
C) are hydrophilic and face outward towards the aqueous solution on both sides of the membrane
D) are hydrophobic and face inward, shielded from water
Points Earned:
0.5/0.5

Correct Answer(s):
C

2.
The function of chloroplasts is
A) lipid synthesis.
B) intracellular digestion.
C) cellular respiration.
D) photosynthesis.
Points Earned:
0.5/0.5

Correct Answer(s):
D

3.
The stroma is the
A) thick fluid enclosed by the inner chloroplast membrane.
B) space between the inner and outer membranes of a chloroplast.
Decreased fertility in men from developed countries may be related to
A) decreased flagella motion due to inactivity.
B) increased exposure to hormone-like chemicals in the environment.
C) increased sperm motility from multiple flagella.
D) decreased metabolic levels from overexposure to UV rays.
Points Earned:
0.5/0.5

Correct Answer(s):
B

16.
Contractile vacuoles
A) prevent cells from bursting as a result of the influx of excess water.
B) help in the excretion of excess salt.
C) are generally found in protists that inhabit salt water.
D) allow organisms to avoid dehydration by absorbing water from the environment.
Points Earned:
0.5/0.5

Correct Answer(s):
A

17.
Which of the following statements about the cytoskeleton is false?
A) The cytoskeleton helps to support cells.
B) The cytoskeleton plays an important role in amoeboid motion.
C) Once laid down, the elements of the cytoskeleton are fixed and remain permanently in place.
D) The cytoskeleton is composed of three types of fibers: microfilaments, microtubules, and intermediate filaments.
Points Earned:
0.5/0.5

Correct Answer(s):
C

18.
Cyanide inhibits mitochondrial function; as a result, the rate
C) large hydrophilic molecules such as starch.
D) nonpolar molecules such as CO2.
Points Earned:
0.5/0.5

Correct Answer(s):
D

4.
The diameter of most animal and plant cells ranges from
A) 0.1 to 1.0 micrometers.
B) 10 to 100 micrometers.
C) 100 to 1000 micrometers.
D) 1.0 to 10 micrometers.
Points Earned:
0.5/0.5

Correct Answer(s):
B

5.
Which of the following statements regarding the Golgi apparatus is false?
A) The Golgi apparatus decreases in size when a cell increases its protein production.
B) The Golgi apparatus works closely with the endoplasmic reticulum.
C) The Golgi apparatus modifies chemicals received from the endoplasmic reticulum.
D) The Golgi apparatus serves as a molecular warehouse and finishing factory.
Points Earned:
0.5/0.5

Correct Answer(s):
A

6.
Intermediate filaments
A) guide the movements of organelles.
B) support the inner mitochondrial membrane.
C) surround the nucleus.
D) guide the movements of chromosomes.
Points Earned:
0.5/0.5

Correct Answer(s):
C

7.
Decreased fertility in men from developed countries may be related to
A) decreased flagella motion due to inactivity.
B) increased exposure to hormone-like chemicals in the