Why is diffusion and osmosis important to cells?

It allows them to take in materials without using energy.

It allows them to absorb sunlight.

It allows cells to use all energy.

1. If the water potential of a cell is higher than the surrounding solution. The water will ____.

Move equally in and out of the cell.

A characteristic of plasma membranes that helps them fuse during vesicle formation and phagocytosis is the

capacity of lipids to associate and maintain a bilayer organization

ratio of one protein molecule for every 25 phospholipid molecules

constant length of the fatty acid chain and the degree of saturation

ability of phospholipid molecules to flip over and trade places with other phospholipid molecules

In biological membranes, the phospholipids are arranged in a _______, with the_______.

bilayer; fatty acids pointing toward each other

bilayer; fatty acids facing outward

single layer; fatty acids facing the interior of the cell

single layer; phosphorus-containing region facing the interior of the cell

Which statement about cholesterol molecules is true?

They alter the fluidity of the membrane.

They help hold a membrane together.

They disrupt membrane function.

The existence of a concentration gradient of glucose across a membrane means that

the glucose molecules are more crowded on one side of the membrane than on the other

there is a high concentration of water on both sides of the membrane

there is a high concentration of glucose on both sides of the membrane

the glucose molecules are chemically bonded more tightly on one side of the membrane than on the other

Which statement about diffusion is false ?

Simple diffusion depends upon specific carrier proteins

In diffusion, molecules move from areas of greater concentration to areas of lesser concentration

Diffusion continues until the molecular concentrations are in equilibrium

If a drop of red ink is placed in one end of a shallow pan filled with water, and a drop of green ink is placed in the other end, which of the following will be true at equilibrium?

The red and green inks will be uniformly distributed throughout the pan

The red ink will be uniformly distributed in one half of the pan, and the green ink will be uniformly distributed in the other half of the pan

The concentration of each ink will be higher at one end of the pan than at the other end

Each ink will begin moving down its concentration gradient

If a hospital patient is mistakenly given an IV of pure water instead of a saline solution that is isotonic to blood, the patient’s red blood cells will

absorb water from the plasma and eventually burst

release water to the plasma along its concentration gradient

transport equal amounts of water across the cell membrane in both directions

The difference between osmosis and diffusion is that

osmosis refers specifically to the movement of water, whereas diffusion refers to the movement of any type of molecules

diffusion is passive transport, whereas osmosis is active transport

only in diffusion do molecules move from areas of high concentration to areas of low concentration

osmosis is the opposite of diffusion and only involves the movement of water

Cell Membranes and Transport

9th - 12th Grade

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61 Qs

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Cell Membranes and Transport

Quiz

•

Biology

•

9th - 12th Grade

•

Practice Problem

•

Hard

•

NGSS

HS-LS1-3, HS-PS1-5, HS-LS2-4

Standards-aligned

Aliza Zenilman

Used 60+ times

FREE Resource

61 questions

Show all answers

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which type of transport requires an input of energy?

Passive Transport

Osmosis

Simple Diffusion

Active Transport

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which form of active transport is being shown?

Pinocytosis

Endocytosis

Exocytosis

Osmosis

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

If a red blood cell is put in a salt solution, what will happen to the cell?

Shrink

Swell

Stay the same

Burst

Most of the cell membrane is made of...

Lipids

Carbohydrates

Proteins

Nucleic acids

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What forms the channels and pumps in the phospholipid bilayer?

carbohydrates

proteins

hydrophilic heads

lipids

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following is responsible for getting large or charged (polar) molecules across the cell membrane?

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The function of the plasma membrane is....

to regulate what enters and leaves the cell.

fight bacteria and viruses that enter the cell.

provide rigid support and protection to the cell.

make sure each cell can move

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Cell Membranes and Transport

61 questions

Which type of transport requires an input of energy?

Which form of active transport is being shown?

If a red blood cell is put in a salt solution, what will happen to the cell?

Most of the cell membrane is made of...

What forms the channels and pumps in the phospholipid bilayer?

Which of the following is responsible for getting large or charged (polar) molecules across the cell membrane?

The function of the plasma membrane is....

Hydrophobic region of the cell membrane?

What does “high concentration area” mean?

When particles move from areas of high concentration to areas less concentrated, this has taken place.

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