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A detailed illustration of cell membranes, showing transport mechanisms like facilitated diffusion and osmosis, with microscopes and cellular structures visible in a colorful, educational style.

Cell Biology Quiz: Test Your Knowledge

Welcome to the Cell Biology Quiz! Test your understanding of important concepts such as facilitated transport, osmosis, and cell membrane structures. This quiz contains 19 multiple-choice questions designed to challenge your knowledge and help you learn.

Key Features:

19 questions covering a range of topics
Immediate feedback on your answers
Fun and educational way to reinforce your learning

19 Questions5 MinutesCreated by JumpingCell47

Which is true of facilitated transport by carrier proteins?

Facilitated transport only applies to small, lipid-soluble molecules.

It is represented by the glucose carrier that can transport hundreds of molecules a second.

After a carrier has transported a molecule, it is unable to transport any more.

Facilitated transport requires expenditure of chemical energy and is therefore active transport.

One carrier protein can carry a variety of different molecules.

An isotonic solution means that the solute concentration outside the cell

Molecules such as glucose and amino acids are not lipid soluble and therefore they

Easily pass across the cell membrane

Require active transport to cross the cell membrane

Must be converted to lipids before they can enter a cell

Combine with carrier proteins and pass across the cell membrane by facilitated transport

Must be engulfed by a cell using endocytosis

According to the fluid-mosaic model of membrane structure

Proteins make up the bulk of the membrane

Only lipids are found in the membrane

Cholesterol is the main constituent of the membrane

Glycolipids form a mosaic pattern inside the cell

Proteins float inside or within the phospholipid bilayer

In certain cancerous cells, the cell divides continuously even in the absence of a growth factor (signaling molecule) that indicates the cell should divide. Which of the following could explain this?

A receptor molecule that is always turned on

A receptor molecule that is always turned off

A transduction pathway that is always turned off

A target protein that is always deactivated

A gene for cell division that is not expressed when it should be

When a substance moves from an area of low concentration to an area of high concentration while using energy, the process is termed

A cell is placed in a solution of large carbohydrate molecules tagged with a red dye. Soon the cell is dark red, showing a concentration of the nutrient much higher than the external solution. We add a reagent that blocks the use of ATP. What result would you expect from this experiment?

The nutrient would continue to rapidly enter the cell by diffusion because as a nutrient it is constantly being used in cell metabolism, so the cell will become more red.

The color will remain the same since all future transfer will stop.

The color will fade as the import of the nutrient stops and diffusion evens the concentrations as it moves the nutrient molecules out of the cell.

The cell will continue to get darker since the import of the nutrient does not involve ATP.

The cell will die without access to ATP.

Proteins do not pass through cell membranes because

When you cut into most active plant tissue, water appears almost immediately because plant cells contain

A hypertonic solution that produces turgor pressure.

A hypotonic solution that produces turgor pressure.

An isotonic condition and you cut the cell open.

A hypertonic condition and cutting it reversed this to hypotonic.

A hypotonic condition and cutting it reversed this to hypertonic.

What property of phospholipids makes them suitable for the formation of the double layer found in membranes?

They are uncharged.

They can interact with proteins.

They are composed of fatty acids.

They have both a hydrophobic and a hydrophilic end.

Both ends are hydrophilic.

The number of mitochondria in a cell would be a general indicator of the extent of

When an intestinal cell ingests substances inside very small vesicles that can only be seen with an electron microscope, this is

Which of the following factors could cause the cell membrane to become less permeable?

If the channel proteins were to denature and become inactive

If the molecules trying to enter the cell were decreased in size

If the hydrophilic head of the phospholipids were to become hydrophobic while the hydrophobic tails become hydrophilic

If the size of the protein channel was to increase

All of the answer choices would cause the cell membrane to become less permeable.

Of the following conditions, which is absolutely necessary for diffusion to take place?

Dead plants seen alongside a salted roadway died because the salt solution caused the cells to

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