Which of the following can cross the cell’s plasma membrane without the assistance of protein transporters? Select all that apply.

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BIOL 101Cell Membrane Quiz Score:100% Points: 80 out of 80

BIOL 101Cell Membrane Quiz

Cell Membrane Quiz

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Schedule:

After deadline.Ended 09/06/2019 11:59 PM EDT

Attempt 1 of 2

Started:09/02/2019 12:03 PM EDT

Submitted:09/02/2019 12:09 PM EDT

Score:100%

Points:80 out of 80

Question 1

Points: 10 out of 10

Which of the following can cross the cell’s plasma membrane without the assistance of protein transporters? Select all that apply.

•             small hydrophobic molecules

•             large polar molecules

•             gasses

•             positively charged ions

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Question 2

Points: 10 out of 10

Which substance would be most likely to pass through a lipid bilayer/plasma membrane without embedded proteins?

•             a large fatty acid

•             water

•             a large peptide hormone

•             a steroid hormone

•             a sodium ion

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Question 3

Points: 10 out of 10

Which component of the plasma membrane has the widest variety of functions?

•             proteins

•             phospholipids

•             sterols

•             carbohydrates

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Question 4

Points: 10 out of 10

All of the following have an effect on the fluidity of a membrane except:

•             the cholesterol content

•             the ratio of saturated to unsaturated fatty acids

•             the presence of integral proteins in the membrane

•             interactions among fatty acids in the core of the bilayer

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Question 5

Points: 10 out of 10

A set of erythrocytes is placed in a beaker of 0.9% NaCl. Nothing appears to happen to the cells. Why?

•             water has not moved at all.

•             Sodium blocks the movement of water.

•             0.9% NaCl is hypertonic to the cells.

•             0.9% NaCl is iostonic to the cells.

•             0.9% NaCl is hypotonic to the cells.

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Question 6

Points: 10 out of 10

What is the role of carbohydrates in the plasma membrane?

•             cellular identification

•             adhesion

•             help maintain fluidity

•             transport materials across the membrane

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Question 7

Points: 10 out of 10

Biological Membranes are:

•             impermeable.

•             static.

•             dynamic.

•             symmetrical.

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Question 8

Points: 10 out of 10

How does the selective permeability of the membrane help the cell.

•             This allows the cell to maintain the proper shape.

•             This allows the cell to regulate what enters and exits

•             This allows the cell to maintain a constant temperature.

•             All of these

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