2.3 Enzymes, Endo/Exothermic Quiz

When an enzyme experience very low temperatures the rate of reaction increases?

• True

• False

Which of the following does NOT have an impact on the rate at which an enzyme functions?

• Temperature

• pH

• Amount of substrate

• The type of enzyme

The optimum pH for this enzyme is approximately

• 2

• 3.5

• 5.5

• 8

• 10

An enzyme is which type of macromolecule

• Carbohydrate

• Lipid

• Protein

• Nucleic acid

Enzymes are important for the body because

• they increase the activation energy needed for a chemical reaction.

• keep the activation energy of a chemical reaction at a constant level.

• lower the activation energy needed for the chemical reaction.

• remove all of the activation energy needed for a chemical reaction.

Which enzyme has an optimum temperature of 40 degrees Celsius?

• Enzyme X

• Enzyme Y

Which enzyme is active over the largest temperature range?

• Enzyme X

• Enzyme Y

Both enzymes will have the same amount of activity at 40 degrees Celsius?

• True

• False

The "lock and key" description explain the mechanism of

• enzyme specificity

• how temperature works

• exocytosis

• vacuole formation

Enzymes speed up the rate of chemical reactions by.....

• giving you extra oxygen.

• absorbing water released when polymers are formed.

• lowering the activation energy.

• combining with excess hydrogen to form a gas.