Energy Flow - Concepts 1-3

The amount of energy needed to make a chemical reaction start is called

• Chemical energy

• Starting energy

• Activation energy

• Enzyme energy

Substances that are changed during a reaction are called

• Substrates

• Reactants

• Products

• Enzymes

Substances that are made by a chemical reaction are called

• Substrates

• Reactants

• Products

• Enzymes

Endothermic reactions ______ energy.

• absorb

• release

In exothermic reactions, reactants have ______ energy than products.

• more

• less

• the same

Photosynthesis is an _____ reaction.

• exothermic

• endothermic

• unimportant

Since enzymes speed up reactions, they can also be called _____.

• reactants

• proteins

• catalysts

• products

Substrates are reactants that bind to enzymes at a specific site called _____.

• the good place

• a catalyst site

• the special site

• an active site

When an enzyme's active site gets deformed and loses its specific shape, the enzyme loses its ability to function and attach to substrates. This is called...

• ion solubility

• denaturation

• catalysm

• acidity

Increases in temperature will _____ the rate of a chemical reaction.

• increase

• decrease