Bio 12 Enzymes

Enzymes are composed of which macromolecule.

• lipids
• protein

Some bacteria live in hot springs. Their cells contain enzymes that function best at temperatures of 70 °C or higher. At the temperature of 50 °C, how will the enzymes in these bacterial cells most likely be affected?
Enzymes work best at an optimal temperature.

• The enzymes will lose their bond structure and fall apart
• The enzymes will not increase the rate of reactions as much as they would at 70 °C. 

Homeostasis is the regulation and maintenance of the ________

• External Environment

• Ecosystem

• Internal environment

• Body temperature

Enzymes are an example of

• Lipids

• Carbohydrate

• Protein

• Nucleic Acid

What is the purpose  of an enzyme?

• give permission for the reaction
• raise activation energy
• speed up reactions
• control how many reactions occur

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 

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

• reusable
• catalyst
• specific
• fragile

What 3 letters do enzymes typically end in?

• -ose
• -ase
• -ese
• -tic

Any substance that is acted upon by an enzyme is called a(n)?

• Coenzyme
• Substrate
• Vitamin
• Polypeptide

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