Enzymes

Multiple Choice

A product is on the left and right

• False

• True

Multiple Choice

Describe the difference between reactants and products in a chemical reaction.

• Reactants are the substances present at the beginning of a chemical reaction, while products are the substances formed as a result of the reaction.

• Reactants and products are the same thing in a chemical reaction

• Reactants and products are interchangeable terms in a chemical reaction

• Reactants are formed at the end of a chemical reaction, while products are present at the beginning

Multiple Choice

In the chemical equation below, the product is....

Na + Cl ---> NaCl

• Na

• NaCL

• Cl

• NaCl

Multiple Select

Select all the Reactants

Multiple Choice

Enzymes are considered to be 

• Lipids
• Carbohydrate
• Protein
• Nucleic Acid

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

Multiple Choice

What is the energy needed to start an chemical reaction referred to?

• Cascading Energy
• Potential Energy 
• Kinetic Energy
• Activation energy

Multiple Choice

Which would be the enzyme that breaks down the starch amylose?

• amylase

• maltase

• lactase

• amylose

Multiple Choice

Cells can only work if their enzymes are functioning. What can you infer from the graph?

• Cells function best at low pH values

• Cells function fine at all pH values

• Cells function best at high pH values

• Cells do not function well if the pH is too high or too low

Multiple Choice

What is the optimal pH of enzyme A?

• 8

• 2

• 5.7-10

• 10

Multiple Choice

Enzymes are an example of

• lipids

• carbohydrates

• protein

• nucleic acid

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 reaction by

• raising the activation energy

• lowering the activation energy

• releasing energy

• absorbing energy.

Multiple Choice

What happens when enzymes are heated to a high temperature?

• The shape of the enzyme are changed and it denatures

• The enzymes die

• The enzymes' amino acid sequence changes

• The enzymes remain the same

Multiple Choice

What happens to an enzyme when it is denatured?

• Activation energy is lowered

• It becomes stronger

• It loses its shape

• Activation energy is raised

Multiple Choice

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 .
  

Multiple Choice

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

• 15^oC
• 40^oC
• 30^oC
• 35^oC