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Plasma Membrane and Passive Diffusion

Authored by Michaela Derelo

Biology

8th Grade

Used 8+ times

Plasma Membrane and Passive Diffusion
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11 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

Media Image

TRUE OR FALSE: The phospholipid bilayers in cell membranes are formed by phospholipid molecules that self-arrange head-to-head.

True

False

Answer explanation

Media Image

The phospholipid bilayer self-arrange tail-to-tail.

2.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

Which cell organelle determines what molecules can enter and leave the cell?

Cytoplasm

Nucleus

Plasma membrane

Vacuole

3.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

All of the following are principal components of the plasma membrane EXCEPT for:

Carbohydrate

Lipids

Nucleic acids

Proteins

Answer explanation

The principal components of the plama membrane are lipids, proteins, and carbohydrates.

4.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

Passive transport involves the movement of particles from an area of _____ concentration to an area of ______ concentration.

HIGH, LOW

LOW, HIGH

LOW, LOW

HIGH, HIGH

5.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

Media Image

This image is an example of a phospholipid. Which describes the part of a phospholipid that is HYDROPHILIC?

the lipid "tails"

the phosphate "tails"

the lipid "heads"

the phosphate "head"

6.

MULTIPLE SELECT QUESTION

45 sec • 4 pts

Which molecules are most likely to cross a cell's phospholipid bilayer by simple diffusion?

Sugar molecules

Water

Carbon dioxide (CO2)

Oxygen (O2)

Potassium Ions

7.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

Which of the following accurately describes the end goal of diffusion?

Molecules stop moving through the cell membrane

Molecules move into a cell at the same rate as molecules move out of the cell.

Molecules move into a cell faster than they move out of a cell.

Molecules move out of a cell faster than they move into the cell.

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