Membranes And Transport
.
- 1.Integral proteins can span the cell membrane because they are
- A.
Hydrophobic
- B.
Hydrophilic
- C.
Amphipathic
- D.
Sandwiched by phopsholipids
- 2.Which membrane would be more fluid? Those with
- A.
Unsaturated phospholipids because of kinked tails
- B.
Saturated phospholipids with occasional cholesterols attached
- C.
Unsaturated fats with unkinked tails
- D.
Saturated fats with large amounts of water trapped inside
- 3.Which is not a reasonable deterent to diffusion?
- A.
Size of the solute particles
- B.
Amount of solute in the solutions
- C.
Types of proteins in the membrane
- D.
The color of the solute used
- 4.In lab, you place a grape into a beaker of salt water and another grape into a beaker of sugar water. Which would, without a doubt, shrink?
- A.
The grape in the sugar water
- B.
The grape in the salt water
- C.
Both
- D.
Neither
- 5.Which is false?
- A.
Active transport requires ATP and passive transport does not
- B.
Active transport uses carrier and passive transport never does
- C.
Passive transport moves from higher to lower concentration and active moves from lower to higher concentration
- D.
Passive transport can move small molecules and active transport moves large or charged molecules
- 6.Which is an example of endocytosis?
- A.
A cell releasing its hormone products
- B.
A white blood cell consuming a bacterium
- C.
Beta cells of the pancreas releasing insulin
- D.
Attachment of an ATP to a protein
- 7.Which would be the WORST solution for an IV fluid?
- A.
Pure water
- B.
Glucose water
- C.
Saline water
- 8.What is the purpose of the carbohydrates in membranes?
- A.
Anchor proteins
- B.
Promotes fluidity
- C.
Act as transporters
- D.
Cell to cell recognition
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