Enzymes

Are enzymes used up in chemical reactions?

• Yes, they can not be used again for another reaction

• No, they can be used again in another reaction

Which letter represents the enzyme?

• A

• B

Which letter represents the substrate?

• A

• B

Which letter represents the Product ?

• B

• C

• D

• E

Enzymes are "Specific", which best describes this?

• function best under certain environmental conditions

• speeds up only one type of reaction.

• can catalyze the same reaction over and over again.

Enzymes are "Sensitive" which best describes this?

• function best under certain environmental conditions

• speeds up only one type of reaction. (Like a lock and key!!!) Example: Amylase – only breaks down starches.

• can catalyze the same reaction over and over again.

Enzymes are considered to be 

• Lipids
• Carbohydrate
• Proteins

• 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

Where do substrates bind on an enzyme?

• voltage-gated channels
• surface receptor
• calcium channels
• active site

The "lock and key hypothesis" attempts to explain the mechanism of?

• Vacuole formation
• Pinocytosis
• Sharing of electrons
• Enzyme specificity