Unit 3: Enzymes, ATP, and Energy Flow

Front

What percentage of energy is passed from one trophic level to the next in an ecosystem?

Back

10 percent of the energy is passed on.

Front

What is an enzyme?

Back

A biological catalyst that speeds up chemical reactions in living organisms.

Front

What is the active site of an enzyme?

Back

The region on the enzyme where the substrate binds.

Front

What is activation energy?

Back

The energy needed to get a reaction going.

Front

What does ATP stand for?

Back

Adenosine triphosphate.

Front

What does the 'TP' in ATP represent?

Back

Tri (3) phosphates.

Front

What is ADP?

Back

Adenosine diphosphate, which is formed when ATP loses one phosphate group.

Front

How is energy released from ATP?

Back

Energy is released when ATP is converted to ADP and a phosphate group.

Front

What role do enzymes play in biochemical reactions?

Back

Enzymes lower the activation energy required for reactions, increasing the rate of the reaction.

Front

What is a substrate in the context of enzymes?

Back

The substance on which an enzyme acts.