Metabolism & Enzymes

The chemical reactions that keep organisms alive are known as ____.

• metabolism
• catalysts

• digestion

• enzymes

Metabolism includes all ____ reactions in the body.

• physical and chemical

• cardiac and respiration

• synthesis and digestion

• voluntary and involuntary

The chemical reactions of life are sped up by important ____ called ____.

• reactants, products

• proteins, enzymes

• macromolecules, amino acids

• polymers, biomolecules

____ means to speed up. Without this added speed, life could not be sustained.

• Catalyze

• Enzyme

• Synthesis

• Polymerize

Each enzyme has a specific ____ which determines the specific job it will do (AKA which reaction it will speed up).

• catalyst

• life span

• DNA

• shape

Enzymes convert ____ into ____

• atoms, molecules

• locks, keys

• reactants, products

• catalysts, metabolism

The lock and key analogy implies that enzymes ___ .

• behave like metals

• open things

• fit reactants precisely

• must be guarded

In an enzyme-mediated chemical reaction, ____ can be made or they can be broken.

• bonds

• molecules

• products

• reactants

Enzymes can catalyze chemical reactions over and over because ----.

• they never run out of energy

• there are so many of them

• they are huge and have many reaction sites

• they remain unchanged by the reactions they catalyze.

True or False: An enzyme can only catalyze one kind of reaction.

• True

• False