Week 10: Chemical Reactions & Enzymes

A process that changes one set of chemicals into a new set of chemicals.

• chemical reaction

• physical reaction

• synthetic reaction

• chemical production

____ are the elements and compounds that go into a reaction.

• Reactants

• Products

• Molecules

• Ingredients

Tags

NGSS.MS-PS1-5

___ are the elements and compounds that are created by a reaction.

• Products

• Reactants

• Molecules

• Ingredients

Tags

NGSS.MS-PS1-2

The energy needed to start a reaction is called the

• activation energy

• starting energy

• promoting energy

• reacting energy

A catalyst is an compound that

• A) speeds up the rate of a reaction.

• B) reduces the amount of energy needed for a reaction to start.

• Both A and B are correct

• Neither A nor B are correct

Enzymes contain a(n) ___ where reactants can bond to react with each other.

• active site

• reaction site

• substrate site

• enzyme site

Some factors can change the shape of an enzyme and when an enzyme's shape has changed it no longer works. When this happens we say that the enzyme has been ___.

• denatured

• altered

• modified

• renatured

Which of the following can cause a protein's shape to change?

• A) changes in pH

• B) high temperatures

• Both A and B

• Neither A nor B

Compare the two pathways, which pathway shows the reaction that has taken place with the help of an enzyme?

• Pathway 1

• Pathway 2

• You cannot tell from these graphs.

• Both reactions involved an enzyme.

Tags

NGSS.HS-PS1-4

At the end of this reaction, has energy been released or absorbed?

• Absorbed

• Released

• There is not enough information to tell.

• There is not change in the amount of energy in the system.

Tags

NGSS.HS-PS1-4