Enzymes

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?

• The enzymes will be destroyed by lysosomes
• The enzymes will lose their bond structure and fall apart.
• The enzymes will require less energy to function than at 70 °C.
• The enzymes will not increase the rate of reactions as much as they would at 70 °C. 

Tags

NGSS.HS-PS1-5

The graph below shows how the activity of an enzyme changes over a range of pH values. 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 continually increases as pH increases from 5.0 to 9.0
• The enzyme’s activity is greater around pH of 8.0 than around pH of 5.0.

The diagram below illustrates a biochemical process that occurs in organisms. What is another name for the substance labeled "catalyst"?

• Enzyme
• inorganic compound
• Hormone
• Antibody

Which of the following best explains why enzymes are necessary for many cellular reactions?

• Enzymes supply the oxygen necessary for the reactions
•  Enzymes change reactants from solid to liquids during the reactions.
• The reactions take up too much space in the cell if the enzymes are missing.
• The reactions are too slow to meet the needs of the cell if enzymes are missing. 

What will most likely happen if an appropriate enzyme is added to a chemical reaction? 

• The reaction rate will increase.
• The equilibrium of the reaction will be maintained. 
• The reaction rate will decrease.
• The reaction will stop. 

Tags

NGSS.HS-PS1-5

Enzymes speed up the rate of reaction by _________ the activation energy (E_A).

• increasing

• decreasing

Tags

NGSS.HS-PS1-4

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

• reusable

• reversible

• specificity

• denaturation

With what 3 letters do enzymes typically end?

• -ose

• -ase

• -ate

• -ine

Enzyme that catalyses the transfer of functional group of atoms from one molecule to another. This enzyme is __

• Isomerases

• Transferases

• Oxidoreductase

• Lyases

Amylase

Lipase

Peptidase/Protease

These enzymes are example of

• Ligases

• Transferase

• Hydrolases

• Lyases