Unit 1 - Cell Transport & Osmosis & Enzymes

Front

What do enzymes do to activation energy?

Back

Enzymes decrease activation energy, allowing reactions to occur more easily.

Front

What is the active site of an enzyme?

Back

The active site is the region on an enzyme where substrates bind and reactions occur.

Front

What does the sodium-potassium pump primarily do?

Back

The sodium-potassium pump usually pumps sodium out of the cell.

Front

What is a substance that speeds up a chemical reaction called?

Back

A catalyst.

Front

How do enzymes increase the rate of a chemical reaction?

Back

Enzymes increase the rate of a chemical reaction by reducing the activation energy.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the difference between passive and active transport?

Back

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

Front

What role do enzymes play in biological reactions?

Back

Enzymes act as catalysts to speed up biological reactions without being consumed in the process.

Front

What is a substrate in the context of enzyme activity?

Back

A substrate is the reactant molecule that an enzyme acts upon.

Front

What happens to enzymes at high temperatures?

Back

High temperatures can denature enzymes, altering their structure and function.