Cell Membrane And Passive Transport: Question Preview (ID: 32479)

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Molecules that can passively pass through the membrane include..
a) glucose and sucrose
b) oxygen and carbon dioxide
c) charged molecules
d) large molecules

Molecules like to flow WITH the concentration gradient. This means they go from _________.
a) high to low concentrations
b) low to high concentrations
c) high to low and low to high concentrations

Passive Transport does NOT
a) take any energy from the cell
b) take any time
c) transport molecules across the cell membrane
d) change the concentrations

Which of the following is an example of passive transport?
a) simple diffusion
b) endocytosis
c) exocytosis
d) active transport

The cell membrane (aka plasma membrane) is made up mostly of...
a) phospholipids
b) carbohydrates
c) proteins
d) nucleic acids

What is an example of a molecule that would have to undergo facilitated diffusion (would need help from a carrier protein)?
a) glucose
b) oxygen
c) carbon dioxide
d) water

The cell membrane is made up of a phospholipid ____________.
a) bilayer
b) monolayer
c) dilayer
d) double layer

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 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.

Hydrophilic means _________, while hydrophobic means ________.
a) water loving; water fearing
b) water fearing ; water loving
c) water loving; water containing
d) water containing; water fearing

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