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Cell Transport Review 1
Test Description: Assess knowledge of cellular transport.
Instructions: Answer all questions to get your test result.
1) Which of the following are the main building blocks of cell membranes?
A
channels
B
phospholipids
C
membrane receptors
D
water molecules
2) Which of the following statements best describes the lipid bilayer?
A
The lipid bilayer anchors enzymes involved in DNA replication.
B
The lipid bilayer produces ATP for cellular energy.
C
The lipid bilayer regulates the flow of materials into and out of cells.
D
The lipid bilayer supplies the amino acids necessary for protein synthesis.
3) Which of the following statements best describes the lipid bilayer?
A
It allows most substances to pass through freely.
B
It has polar and nonpolar regions.
C
It is composed of polysaccharides.
D
It gives cells a rigid shape.
4) Which of the following statements best describes the lipid bilayer of a cell membrane?
A
The polar heads are positioned to interact with the inside and outside of a cell.
B
The polar heads interact with the inside and outside of a cell while the tails are in the middle.
C
The lipid bilayer is composed mostly of polysaccharides and proteins.
D
Nonpolar molecules are positioned towards the outer edges of the bilayer.
5) Which of the following act as gates to allow polar molecules to cross the cell membrane?
A
channel and carrier proteins
B
membrane receptors
C
polar heads
D
nonpolar tails
6) Oxygen molecules move freely across membranes until they reach equilibrium. Which of the following best describes this transport mechanism?
A
diffusion
B
cotransport
C
active transport
D
exocytosis
7) Since lipid molecules and the cell membrane both contain large amounts of fatty compounds, lipids are able to freely pass through the cell membrane without the aid of pumps or channels. Which of the following best describes this transport mechanism?
A
passive transport
B
osmosis
C
simple diffusion
D
active transport
8) Which of the following is an example of passive transport?
A
cotransport
B
facilitated diffusion
C
receptor-mediated endocytosis
D
phagocytosis
9) An example of a molecule that would move through the phospholipid layer would be
A
sodium.
B
amino acids.
C
carbon dioxide gas.
D
glucose.
10) An example of a molecule that would move through a carrier protein would be
A
water.
B
oxygen gas.
C
carbon dioxide.
D
glucose.
11) Which of the following is an example of passive transport?
A
phagocytosis
B
cotransport
C
diffusion
D
pinocytosis
12) Exocytosis is like a(n)
A
bailer dumping water out of a leaking boat.
B
boat bringing immigrants.
C
football player running with the ball.
D
outgoing international flight.
13) Endocytosis is like a(n)
A
football player running with the ball.
B
bailer dumping water out of a leaking boat.
C
outgoing international flight.
D
boat bringing immigrants.
14) Which of the following is best described as pumping ions against the concentration gradient or from low to high?
A
exocytosis
B
diffusion
C
osmosis
D
active transport
*select an answer for all questions
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