Free Practice Quiz Question List

1 Cells and Membrane Structure Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Cells and Membrane Structure, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

According to cell theory, new cells arise from preexisting cells.

A
True
B
False

Choose one

1 point

Which pair of groups consists of prokaryotes?

A
Animals and plants
B
Bacteria and Archaea
C
Fungi and protists
D
Plants and fungi

Fill in the blank

1 point

In a watery environment, phospholipid fatty-acid tails point inward, away from water. They are .

Written response

1 point

What is the name of the model describing a flexible membrane in which lipids and many proteins can move sideways?

Choose one

1 point

Which statement correctly compares the cell walls of plant and animal cells?

A
Animal cells have a cell wall outside the plasma membrane, but plant cells do not.
B
Plant cells have a cell wall outside the plasma membrane, but animal cells do not.
C
Both animal and plant cells lack a cell wall.
D
Both animal and plant cells have a cell wall inside the plasma membrane.

Choose all

1 point

Select all features that are present in all cells.

A
Plasma membrane
B
Nucleus
C
Cytoplasm
D
DNA
E
Ribosomes
F
Cell wall

True or false

1 point

Some membrane proteins span the bilayer, while others are attached to just one surface.

A
True
B
False

Fill in the blank

1 point

A membrane's ability to allow some substances to cross while restricting others is called .

Written response

1 point

What term describes a molecule, such as a phospholipid, that has both a water-attracting region and a water-avoiding region?

Choose one

1 point

Which type of molecule can pass through the phospholipid bilayer most readily without help from membrane proteins?

A
Large, water-soluble molecules
B
Most ions
C
Small, nonpolar molecules
D
All polar substances

Choose all

1 point

Select all statements about membrane proteins and carbohydrate chains that are supported.

A
Membrane proteins contribute specific properties and functions.
B
Carbohydrate chains make every membrane identical.
C
Carbohydrate chains on some lipids and proteins can help cells interact and be recognized.
D
Carbohydrate chains replace the phospholipid bilayer.

Choose one

1 point

What does membrane asymmetry mean?

A
The two sides of a membrane always have identical compositions.
B
The two sides of a membrane can have different compositions.
C
All membrane components are fixed in place.
D
A membrane contains no lipids.

Choose one

1 point

Which lipid is identified as an important component of animal-cell membranes?

A
Cholesterol
B
DNA
C
Cellulose
D
Ribosomes

Open ended

1 point

Explain how the fluid mosaic model and membrane asymmetry describe different aspects of membrane organization. Include what can move within the membrane and what may differ between its two sides.

Choose one

1 point

A researcher observes a cell dividing into two daughter cells. Which statement from cell theory explains how those daughter cells originated?

A
A cell can form spontaneously from nonliving material under ordinary conditions.
B
Every living organism must be made of many cells.
C
A new cell arises from a preexisting cell.
D
Only eukaryotic cells can produce new cells.

Choose one

1 point

A phospholipid bilayer separates a cell’s cytoplasm from watery fluid outside it. Which arrangement best explains how the phospholipids are oriented?

A
The hydrophobic tails face the watery fluids, and the heads point inward.
B
The hydrophilic heads face the watery fluids, and the tails point inward.
C
Both heads and tails point toward the outside of the cell.
D
The heads and tails alternate in a single layer.

Choose one

1 point

A cell needs to move an ion across its plasma membrane. Based on selective permeability, which prediction is best?

A
An ion is likely to need help from a membrane protein to cross.
B
An ion should pass through the bilayer more readily than a small, nonpolar molecule.
C
An ion can cross unaided because the bilayer interior is hydrophilic.
D
An ion cannot cross the membrane under any circumstances.

Written response

1 point

What term describes a phospholipid that has both a water-attracting head and water-avoiding tails?

Written response

1 point

A cell’s DNA is in a nucleoid region, and the cell has no membrane-enclosed nucleus. What broad cell-organization term applies?

True or false

1 point

True or false: Because plants and animals are both eukaryotes, animal cells have cell walls just as plant cells do.

A
True
B
False