Enzymes and Chemical Reaction Review

Without the presence of enzymes, the reactions necessary to sustain life would require __________ in order to occur.

• Increased pressure

• Larger cells

• Higher temperatures

• Larger proteins

• Smaller molecules

Which of the following could be used to increase the reaction rate beyond point C?

• Increase the amount of enzyme

• Add more water

• Decrease the temperature

• Decrease substrate concentration

Tags

NGSS.HS-PS1-5

When a piece of liver is dropped into hydrogen peroxide, the peroxide bubbles vigorously as a result of what reaction?

• Peroxide being broken into water and oxygen

• Peroxide destroying germs in the liver

• More peroxide being created by the liver

• Liver and peroxide joining together to make a new protein

Tags

NGSS.HS-PS1-4

Some people cannot digest lactose because they lack a specific enzyme. Which enzyme would be used to break down the lactose in milk?

• Hydroxylase

• Lactase

• Peroxidase

• Amylase

A scientist observes that, when the pH of the environment surrounding an enzyme is changed, the rate the enzyme catalyzes a reaction decreases. Which statement best describes how a change in pH can affect an enzyme?

• A pH change can cause the enzyme to change its shape

• A pH change can remove energy necessary to activate an enzyme

• A pH change can add new molecules to the structure of the enzyme

• A pH change can cause an enzyme to react with a different substrate

On the image, which letter represents the enzyme?

• A

• B

• C

• D

On the image, which letter represents the product of the reaction?

• A

• C

• D

• E

Tags

NGSS.HS-PS1-2

In the diagram, what type of reaction is shown?

• Anabolic reaction

• Catabolic reaction

• Replacement reaction

• Combustion reaction

Tags

NGSS.HS-LS1-7

Substance A is converted to substance B in a metabolic reaction. Which statement best describes the role of an enzyme during this reaction?

• The enzyme adjusts the pH of the reaction medium

• The enzyme provides energy to carry out the reaction

• The enzyme dissolves substance A in the reaction medium

• The enzyme speeds up the reaction without being consumed

Which statement is most accurate regarding enzymes?

• Enzymes are broken down during chemical reactions

• Enzymes decrease the rate of chemical reactions in the body

• Enzymes reduce the amount of activation energy needed

• Enzymes never change shape