Cell Transport Review 1 Question Preview (ID: 10721)
Assess Knowledge Of Cellular Transport.
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Which of the following are the main building blocks of cell membranes?
a) water molecules
b) channels
c) phospholipids
d) membrane receptors
Which of the following statements best describes the lipid bilayer?
a) The lipid bilayer produces ATP for cellular energy.
b) The lipid bilayer regulates the flow of materials into and out of cells.
c) The lipid bilayer anchors enzymes involved in DNA replication.
d) The lipid bilayer supplies the amino acids necessary for protein synthesis.
Which of the following statements best describes the lipid bilayer?
a) It gives cells a rigid shape.
b) It is composed of polysaccharides.
c) It has polar and nonpolar regions.
d) It allows most substances to pass through freely.
Which of the following statements best describes the lipid bilayer of a cell membrane?
a) Nonpolar molecules are positioned towards the outer edges of the bilayer.
b) The lipid bilayer is composed mostly of polysaccharides and proteins.
c) The polar heads are positioned to interact with the inside and outside of a cell.
d) The polar heads interact with the inside and outside of a cell while the tails are in the middle.
Which of the following act as gates to allow polar molecules to cross the cell membrane?
a) channel and carrier proteins
b) polar heads
c) nonpolar tails
d) membrane receptors
Oxygen molecules move freely across membranes until they reach equilibrium. Which of the following best describes this transport mechanism?
a) active transport
b) exocytosis
c) cotransport
d) diffusion
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) active transport
d) simple diffusion
Which of the following is an example of passive transport?
a) facilitated diffusion
b) receptor-mediated endocytosis
c) phagocytosis
d) cotransport
An example of a molecule that would move through the phospholipid layer would be
a) sodium.
b) glucose.
c) carbon dioxide gas.
d) amino acids.
An example of a molecule that would move through a carrier protein would be
a) oxygen gas.
b) glucose.
c) water.
d) carbon dioxide.
Which of the following is an example of passive transport?
a) pinocytosis
b) phagocytosis
c) diffusion
d) cotransport
Exocytosis is like a(n)
a) boat bringing immigrants.
b) outgoing international flight.
c) football player running with the ball.
d) bailer dumping water out of a leaking boat.
Endocytosis is like a(n)
a) boat bringing immigrants.
b) outgoing international flight.
c) football player running with the ball.
d) bailer dumping water out of a leaking boat.
Which of the following is best described as pumping ions against the concentration gradient or from low to high?
a) diffusion
b) active transport
c) exocytosis
d) osmosis
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