Monday Unit 1 Review

Enzymes are

• nucleic acids
• proteins
• lipids
• carbohydrates

Which of the following binds to the active site of an enzyme? 

• substrate
• product
• codon
• none of the above

What is the function of an enzyme?

• enzymes break themselves into small pieces
• they slow down chemical reactions
• they speed up chemical reactions
• enzymes combine products to form reactants 

What happens when enzymes are heated to a high temperature?

• The enzymes die.
• The shapes of the enzyme are altered or denatured
• The enzymes' amino acid sequence changes.
• The enzymes remain the same

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

• Enzymes increase the energy of the reactants.
• Enzymes decrease the energy level of the products.
• Enzyme decrease the activation energy of the reaction.
• Enzymes reverse the direction of the reaction.

What is another name for enzymes?

• chemical catalysts
• microorganisms
• biological catalysts
• inorganic catalysts

Which line represents an enzyme-catalyzed reaction? 

• Line 1
• Line 2

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

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

What is a Cataylst?

• A substance that speeds up a rate of chemical reaction.
• Molecules that make enzymes work harder and faster 
• reaction of an enzyme
• A substance that slows down a rate of chemical reaction.

What is the optimal pH of enzyme A?

• 8

• 2

• 5.7-10

• 10