Exam Enzymes

Which factor does NOT alter the rate of enzyme reactions:

• temperature of the environment of the reaction

• PH of the environment of the reaction

• total volume of the substrate

• number of enzyme molecules present

In this diagram, structure X is most likely

• a molecule of oxygen

• an organic catalyst

  Enzyme

• the end product

• the substrate

Which letter represents an enzyme functioning in this reaction

• A

• B

• C

• E

Which letter is NOT associated with the reaction that is occurring in the solution?

• a

• b

• c

• d

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which enzyme shows the greatest change in its rate of action with the least change in PH?

• a

• b

• c

• d

Which enzymes would function in a region of the human body having a neutral ph?

• A & B

• B & C

• A & D

• C & D

According to the graph,

addition of the enzyme amylase causes the reaction to:

• slow down

• speed up

• take in heat

• give off heat

This graph show that:

• more enzymes are present at a higher PH

• pepsin is less sensitive to ph than trypsin

• pepsin is less effective at a low ph than trypsin

• ph affects the activity rates of enzymes

Tags

NGSS.HS-PS1-5

What is the function of enzymes in biological systems?

• Enzymes act as products to create new chemical reactions

• Enzymes act as substrates when the necessary proteins are unavailable

• Enzymes bond with substrates to create the new reaction products

• Enzymes act as catalysts to drive chemical reactions forward

Peroxidase is an enzyme that breaks down hydrogen peroxide in cells.

It accomplishes this because of its structure.

What part of the enzyme is involved in catalytic activity?

• Quaternary structure

• Active site

• Binding pocket

• Pleated sheet