Biology Quiz
Name_________________________________
1) A single-celled freshwater organism, such as a protistan, is transferred to salt water. Which of the following
is likely to happen?
a) The cell bursts.
d) Enzymes flow out of the cell.
b) Salt is pumped out of the cell.
e) All of these.
c) The cell shrinks.
2) In simple diffusion
a) the rate of movement of molecules is controlled by temperature and pressure.
b) the movement of individual molecules is random.
c) the movement of molecules of one substance is independent of the movement of any other substance.
d) the net movement is away from the region of highest concentration.
e) is all of these.
3) Which of the following is a passive process?
a) sodium-potassium pump
c) exocytosis
b) endocytosis
d) diffusion
e) none of these
The images above are pictures red blood cells immersed in fluids of different tonicity. Refer to these images to
answer questions 8-10.
4) The red blood cells in micrograph A are immersed in a(n) _____ solution.
a) hypotonic
b) isotonic
c) hypertonic
5) The red blood cells in micrograph B are immersed in a(n) _____ solution.
a) hypotonic
b) isotonic
c) hypertonic
6) The red blood cells in micrograph C are immersed in a(n) _____ solution.
a) hypotonic
b) isotonic
c) hypertonic
7) Which of the following needs a transport protein to cross the cell membrane?
a) water
c) glucose
e) carbon dioxide and water
b) carbon dioxide
d) oxygen
8) Which of the following is a passive process that requires a protein for movement of a solute across a
membrane?
a) active transport
c) bulk flow
e) none of these
b) endocytosis
d) facilitated diffusion
9) Movement of a molecule against a concentration gradient occurs in
a) simple diffusion.
c) osmosis.
b) facilitated diffusion.
d) active transport.
e) passive transport
10) The method of movement that requires the expenditure of ATP molecules (energy) is
a) simple diffusion.
c) osmosis.
e) passive transport.
b) facilitated diffusion.
d) active transport.
The question(s) ask about membrane permeability. Answer them in reference to the four processes below:
a) simple diffusion
c) osmosis
b) facilitated diffusion
d) active transport
11) This process specifically moves water molecules across a semi permeable membrane.
12) This phenomenon explains the movement of any kind of molecule from areas of higher concentration to
ones of lower concentration.
13) This is the process whereby a protein assists in passive transport.
14) This process explains the movement of molecules against a concentration gradient.
In the diagram to left, side A has a 3 percent sucrose solution and side B has a 10
percent sucrose solution. The membrane separating the sides is permeable to water
but impermeable to sucrose.
15) Side A is ____ to side B.
a) hypertonic
e) either isotonic or
b) hypotonic
hypotonic
c) isotonic
d) either isotonic or hypertonic
16) Which of the following best describes the movement of water in this system?
a) Water moves in both directions, but net
c) Water moves in both directions, but net
movement is from A to B.
movement is from B to A.
b) Water only moves from A to B.
d) Water only moves from B to A.
e) There is no net movement of water.
17) Which of the following best describes the movement of sucrose in this system?
a) Sucrose moves in both directions, but net
c) Sucrose moves in both directions, but net
movement is from A to B.
movement is from B to A.
b) Sucrose only moves from A to B.
d) Sucrose only moves from B to A.
e) There is no net movement of sucrose.
18) The DNA molecule is usually made up of how many strands?
a) 1
c) 3
e) 12
b) 2
d) 6
19) The RNA molecule is made up of how many strands?
a) 1
c) 3
e) 12
b) 2
d) 6
20) The nitrogenous base found in DNA but not in RNA is
a) adenine.
c) guanine.
b) cytosine.
d) uracil.
21) Which substance is found in RNA but not in DNA?
a) thymine
c) ribose
b) deoxyribose
d) guanine
e) thymine.
e) cytosine
Use the figure above to answer questions
22) Identify the nucleotide base pair.
a) A
c) C
e) E
b) B
d) D
23)
Identify the sugar-phosphate backbone.
a) A
c) C
e) E
b) B
d) D
24) Identify the RNA molecule.
a) A
c) C
e) E
b) B
d) D
25) Identify which structure contains ribose?
a) A
c) C
e) E
b) B
d) D
26) Which of the following indicate a hydrogen bond between two nitrogenous bases?
a) A
c) C
e) E
b) B
d) D