Cell Transport Quiz

1. Water-loving molecules such as glucose are:
A hydrophobic
B hydrophilic
C insoluble in water
2. The model of a cell membrane containing a bilayer of phospholipid molecules with interspersed protein molecules is the:
A induced fit model
B fluid mosaic model
C lock and key model
3. The cell membrane is differentially permeable. This means that:
A some molecules may pass through but not others
B all molecules pass through the membrane at the same rate
C only glucose passes through easily
4. The transport of mineral ions from soil to plant root requires energy-rich ATP. This is an example of:
A passive transport
B active transport
C osmosis
5. Diffusion is the movement of substances from:
A low to high concentrations
B high to low concentrations
C equal areas
6. The diffusion of water is called:
A osmosis
B hydrophobic
C concentration gradient
7. When a microscopic protozoan takes in a particle of food into itself, the process used is:
A exocytosis
B endocytosis
C osmosis
8. When milk is secreted by mammary glands, the process used is:
A exocytosis
B endocytosis
C osmosis
9. White blood cells engulfing foreign bacteria is an example of:
Aphagocytosis
Bexocytosis
Cdiffusion
10. The difference between the membrane surrounding a cell and an organelle is that the cell membrane is:
Amore porous
Bthicker
Cthinner
11. In saltwater, the solvent is the:
Avarious salts
Bsodium chloride only
Cwater
12. What is the difference between passive and active transport?
APassive transport releases energy, but active transport does not
BPassive transport requires an output of energy
CActive transport requires an input of energy, but passive transport does not
13. Osmosis is:
Athe movement of water from low to high concentrations
Bthe movement of solvent from low to high concentrations
Cthe diffusion of water
14. How do amino acids move across the cell membrane?
AThey move by osmosis from the inside to the outside of the cell.
BThey are water-soluble, require energy, and pass through the channels made by protein molecules.
CThey are lipid-soluble and move by diffusion.
15. Approximately what percentage of water makes up cytoplasm?
A25-30%
B30-70%
C70-95%
 
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