Inside the Cell

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What increases the electrochemical gradient across a membrane?

Back

A proton pump increases the electrochemical gradient across a membrane.

Front

What is diffusion?

Back

Diffusion is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.

Front

What type of molecule is formed from amino acids?

Back

Proteins are formed from amino acids.

Front

What macromolecule breaks down into sugars such as glucose?

Back

Carbohydrates break down into sugars such as glucose.

Front

What is the function of a carrier protein?

Back

Carrier proteins facilitate the transport of substances across a cell membrane.

Front

What is the role of integral proteins in the cell membrane?

Back

Integral proteins assist in the transport of molecules and can act as channels or carriers.

Front

Define active transport.

Back

Active transport is the movement of molecules across a membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What are lipids?

Back

Lipids are a group of hydrophobic molecules that include fats, oils, and phospholipids.