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Cell Membranes and Transport

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Questions and Answers

What is the main function of the cell membrane?

To provide structural support

To regulate what enters and leaves the cell (correct)

To store genetic information

To synthesize proteins

What is the Fluid Mosaic Model used to describe?

The structure of the nucleus

The process of photosynthesis

The fluid nature of the cell membrane (correct)

The structure of the mitochondria

What is the role of carrier proteins in facilitated diffusion?

To increase the rate of diffusion

To provide energy for active transport

To transport molecules down their concentration gradient (correct)

To pump molecules against their concentration gradient

What is the main difference between primary and secondary active transport?

The use of ATP Signup and view all the answers

What is the result of placing a cell in a hypotonic solution?

The cell will swell Signup and view all the answers

What is the function of aquaporin?

To facilitate the transport of water Signup and view all the answers

What is the main function of the phospholipid bilayer in the cell membrane?

To regulate the movement of substances in and out of the cell Signup and view all the answers

What is the key factor that affects the fluidity of the cell membrane?

Fatty acid composition of phospholipids Signup and view all the answers

What type of transport does not require energy and occurs from an area of high concentration to an area of low concentration?

Passive transport Signup and view all the answers

What is the purpose of the Freeze Fracture Technique?

To study the structure of cell membranes Signup and view all the answers

What is the term for the movement of water from an area of high concentration to an area of low concentration?

Osmosis Signup and view all the answers

What type of protein is involved in facilitated diffusion?

Carrier protein Signup and view all the answers

What is the term for the movement of substances against their concentration gradient?

Active transport Signup and view all the answers

What is the term for the process of taking in large particles or cells through the formation of vesicles?

Endocytosis Signup and view all the answers

What is the term for the protein that forms a channel for water molecules to pass through the cell membrane?

Aquaporin Signup and view all the answers

What is the term for the movement of substances from an area of high concentration to an area of low concentration with the assistance of a transport protein?

Facilitated diffusion Signup and view all the answers