Energy Flow Concept 1 Enzymes

What phrase best describes an exothermic reaction?

• does not absorb any energy

• forms products with higher bond energy than the reactants

• is in a state of equibrium

• releases more energy than it absorbs

Identify the products in the reaction: 6H₂O + 6CO₂ → C₆H₁₂O₆ + 6O₂

• 6H₂O and 6CO₂

• 6H₂O, C₆H₁₂O₆ and 6O₂

• 6CO₂ and C₆H₁₂O₆

• C₆H₁₂O₆ and 6O₂

The activation energy needed for a chemical reaction is decreased by a

• catalyst

• reactant

• products

• substrate

If the activation energy of a biochemical reaction is lowered, then

• the reaction will happen faster

• the reaction will happen more slowly

• this will not affect the rate of the reaction

• both a and b

The molecule that an enzyme biinds to is known as its

• substrate

• mnomrt

• polymer

• complimentary base

Chemical reactions change _____ into _____.

• products, reactants

• reactants, products

The _____ is required in order for a chemical reaction to occur.

• bonds

• activation energy

There are KINDS of chemical reactions,

• endothermic and exothermic

• photosynthesis and cellular respiration

• products and reactants

An example of a reaction that releases energy is

• photosynthesis

• cellular respiration

An example of a reaction that absorbs energy is

• exothermic

• endothermic