Enzymes Lesson

Multiple Choice

Enzymes are

• Lipids

• Protein

• Carbohydrates

• Nucleic Acids

Multiple Choice

Enzymes are responsible for-

• Speeding up reactions

• Giving the body energy

• Slowing down reactions

Multiple Choice

Which of these is most likely an enzyme?  

• Sucrose

• Galactose

• Fructose

• Amylase

Multiple Choice

Letter D...

• active site

• enzyme

• substrate

• products

Multiple Choice

Letter B...

• active site

• enzyme

• substrate

• products

Multiple Choice

Letter c...

• active site

• enzyme

• substrate

• products

Multiple Choice

Each enzyme only has 1 substrate that will fit its active site.  What is this called?

• reusablility

• denaturation

• specificity

• fragility

Multiple Choice

What is a substance called if it speeds up a chemical reaction?

• reusable

• catalyst

• specific

• fragile

Multiple Choice

An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 

• true

• false

Multiple Choice

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

• a substrate
• an enzyme
• a product
• an active site

Multiple Choice

What happens when enzymes are heated to a high temperature?

• The enzymes die.

• The shapes of the enzyme are altered denature

• The enzymes' amino acid sequence changes.

• The enzymes remain the same

Multiple Choice

At high temperatures enzyme activity declines because of:

• Denaturation

• Increased H-Bonding

• Decreased Kinetic Movement

• Dissociation of Ionic COmpounds

Multiple Choice

Based on the graph, what is the optimal temperature for this enzyme?

• 15^oC

• 40^oC

• 30^oC

• 35^oC

Multiple Choice

An enzyme speeds up a reaction by

• lowering the activation energy.

• raising the activation energy.

• releasing energy.

• absorbing energy.

Multiple Choice

Letter E...

• active site

• enzyme

• substrate

• products

Multiple Choice

Letter C...

• active site

• enzymes

• substrate

• products

Multiple Choice

Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?

• reducing the number of products

• reducing the activation energy

• increasing the temperature of the cell

• increasing the concentration of reactants

Multiple Choice

What is the purpose of an enzyme?

• give permission for the reaction

• raise activation energy

• speed up reactions

• control how many reactions occur