Ch. 2.4 Chemical Reactions and Enzymes

What is a chemical reaction?

• A process that changes one set of compounds into another

• A substance that speeds up the rate of a chemical reaction

• Energy that is needed to get a reaction started

• Elements or compounds produced by a chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are reactants in a chemical reaction?

• Elements or compounds that enter into a chemical reaction

• A process that changes one set of compounds into another

• Energy that is needed to get a reaction started

• Elements or compounds produced by a chemical reaction

What are products in a chemical reaction?

• Elements or compounds produced by a chemical reaction

• A process that changes one set of compounds into another

• Energy that is needed to get a reaction started

• Elements or compounds that enter into a chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is activation energy?

• Energy that is needed to get a reaction started

• A substance that speeds up the rate of a chemical reaction

• Elements or compounds produced by a chemical reaction

• Elements or compounds that enter into a chemical reaction

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

What is the role of enzymes in living things?

• To speed up chemical reactions

• To absorb energy in chemical reactions

• To produce reactants in chemical reactions

• To break chemical bonds in chemical reactions

What is the effect of enzymes on a chemical reaction?

• Lower the activation energy and speed up the reaction

• Increase the activation energy and slow down the reaction

• Change the reactants into products

• Absorb energy in the reaction

Tags

NGSS.HS-PS1-4

What are substrates in an enzyme-catalyzed reaction?

• The reactants in the reaction

• The products of the reaction

• The energy released in the reaction

• The temperature and pH of the reaction

What is the active site of an enzyme?

• Part of the enzyme where substrates bind

• Part of the enzyme that releases energy

• Part of the enzyme that changes shape

• Part of the enzyme that absorbs energy

What can change the structure of an enzyme and affect its function?

• High temperature and extreme pH

• Low temperature and neutral pH

• High temperature and neutral pH

• Low temperature and extreme pH

What is the normal temperature at which enzymes in the human body work best?

• 37 degrees Celsius

• 0 degrees Celsius

• 100 degrees Celsius

• 25 degrees Celsius