Unit 3: Enzymes, ATP, and Energy Flow

Front

What is an enzyme?

Back

A biological catalyst that speeds up chemical reactions in living organisms without being consumed in the process.

Front

What is ATP?

Back

Adenosine triphosphate, the energy currency of the cell, used to store and transfer energy.

Front

What is a food web?

Back

A complex network of feeding relationships among various organisms in an ecosystem.

Front

What is a consumer?

Back

An organism that obtains energy by feeding on other organisms.

Front

What are producers?

Back

Organisms that produce their own food through photosynthesis or chemosynthesis.

Front

What is a decomposer?

Back

An organism that breaks down dead or decaying organic material, returning nutrients to the ecosystem.

Front

What are the three main parts of an ATP molecule?

Back

Adenine, ribose, and three phosphate groups.

Front

What is the active site of an enzyme?

Back

The region on the enzyme where the substrate binds and the reaction occurs.

Front

What is a substrate?

Back

The reactant molecule that an enzyme acts upon.

Front

What is the role of enzymes in biological reactions?

Back

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