Enzymes

Letter E...

• active site
• enzyme
• substrate
• products

In the diagram, what is letter A? 

• product
• substrate
• enzyme-substrate complex
• active site

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

• true
• false

Enzymes belong to which group of organic molecules?

• nucleic acids

• proteins

• lipids

• carbohydrates

What is the function of an enzyme?

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

Letter D...

• active site
• enzyme
• substrate
• products

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

• reusable
• catalyst
• specific
• fragile

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.

Which substrate would this enzyme catalyze?

• Δ
• σ
• ∅
• μ

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .