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Cell Membrane And Passive Transport
Test Description: Cell membrane structure, function and basic questions on passive transport
Instructions: Answer all questions to get your test result.
1) Which of the following is an example of passive transport?
A
active transport
B
simple diffusion
C
exocytosis
D
endocytosis
2) Passive Transport does NOT
A
transport molecules across the cell membrane
B
take any time
C
change the concentrations
D
take any energy from the cell
3) Molecules like to flow WITH the concentration gradient. This means they go from _________.
A
high to low and low to high concentrations
B
low to high concentrations
C
high to low concentrations
4) Molecules that can passively pass through the membrane include..
A
glucose and sucrose
B
large molecules
C
oxygen and carbon dioxide
D
charged molecules
5) The cell membrane (aka plasma membrane) is made up mostly of...
A
proteins
B
phospholipids
C
nucleic acids
D
carbohydrates
6) What is an example of a molecule that would have to undergo facilitated diffusion (would need help from a carrier protein)?
A
water
B
glucose
C
carbon dioxide
D
oxygen
7) The cell membrane is made up of a phospholipid ____________.
A
bilayer
B
dilayer
C
monolayer
D
double layer
8) 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.
9) 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 supplies the amino acids necessary for protein synthesis.
D
The lipid bilayer anchors enzymes involved in DNA replication.
10) Hydrophilic means _________, while hydrophobic means ________.
A
water fearing ; water loving
B
water loving; water fearing
C
water loving; water containing
D
water containing; water fearing
*select an answer for all questions
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