What is the primary driving force behind passive transport across a cell membrane?

Cell Membrane Transport Mechanisms

Interactive Video
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Biology
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9th - 10th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Energy input
Electrical charge
Concentration gradient
Membrane thickness
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which factor does NOT influence the rate of diffusion across a membrane?
Color of the molecule
Concentration gradient
Temperature
Molecule size
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is required for a molecule to pass through the phospholipid bilayer if it cannot do so on its own?
A thicker membrane
A larger concentration gradient
A membrane protein
A higher temperature
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an example of a molecule that can pass through the lipid bilayer without assistance?
Glucose
Oxygen
Sodium ions
Amino acids
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of transport protein is typically used for the movement of ions across a membrane?
Lipid bilayers
Aquaporins
Channel proteins
Carrier proteins
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of diffusion involves the help of proteins to move substances across the cell membrane?
Osmosis
Facilitated diffusion
Active transport
Simple diffusion
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a characteristic of facilitated diffusion?
Involves transport proteins
Requires energy input
Moves substances down their concentration gradient
Can involve carrier or channel proteins
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