Biomolecules and Enzymes

Multiple Choice

Enzymes speed up reactions.

• True

• False

Multiple Choice

Enzymes are composed of what biomolecule?

• sugars

• proteins

• fatty acids

• nucleic acid

Multiple Choice

Enzymes interact with SPECIFIC substrates.

• True

• False

Multiple Choice

Some people cannot digest milk products because they lack what specific enzyme that would break down the lactose in milk?

• hydroxylase

• maltase

• peroxisomes

• lactase

Multiple Choice

What would you label "c"?

• substrate

• enzyme

• active site

• product

Multiple Choice

What would you label "a"?

• substrate

• enzyme

• active site

• product

Multiple Choice

What would you label "b", where the substrate binds?

• substrate

• enzyme

• active site

• product

Multiple Choice

What would you label "d"?

• substrate

• enzyme

• active site

• product

Multiple Choice

Enzymes change shape after a reaction occurs.

• True

• False

Multiple Choice

Raising the temperature slightly will

• increase the rate of reaction

• decrease the rate of reaction

• not change the rate of reaction

Multiple Choice

Boiling temperature will

• increase the rate of reaction

• decrease the rate of reaction

• denature the enzyme and it will stop working

Multiple Choice

Freezing temperature will

• increase the rate of reaction

• decrease the rate of reaction

• not change the rate of reaction

Multiple Choice

Changing pH towards the optimal pH will

• increase the rate of reaction

• decrease the rate of reaction

• not change the rate of reaction

Multiple Choice

In what way could you increase the rate of reaction for image C?

• add more substrate

• add more enzyme

• remove enzymes

• remove substrate

Multiple Choice

Enzyme reactions can be slowed or halted using inhibitors.

• True

• False

Multiple Choice

Introducing a competitive inhibitor will

• increase the rate of reaction

• decrease the rate of reaction

• not change the rate of reaction

Multiple Choice

Which will NOT increase the rate of enzymatic reaction?

• add more enzyme

• adjust pH to optimal level

• add non-competitive inhibitors

• raise the temperature

Multiple Choice

Hydrolysis used water to

• build a new molecule

• digest the molecule

Multiple Choice

Hydrolysis of a protein produces

• nucleic acids

• carbohydrates

• amino acids

• lipids

Multiple Choice

Dehydration synthesis of monosaccharides produces

• nucleic acids

• carbohydrates

• amino acids

• lipids

Multiple Choice

Which process would digest lipids into fatty acids?

• Hydrolysis

• Dehydration synthesis

Multiple Choice

Based on the graph, which of the following could be used to increase the reaction rate beyond point c?

• increase the amount of substrate

• add more water

• increase the temperature

• decrease enzyme concentration

Multiple Choice

When a piece of liver is dropped into hydrogen peroxide, the peroxide bubbles vigorously as a result of what reaction? (hint: hydrolysis)

• peroxide being broken into water and oxygen

• peroxide destroying germs in the liver

• more peroxide is being created by the liver

• liver and peroxide are joining together to make a new protein

Multiple Choice

Based on the liver breaking down hydrogen peroxide, the liver must contain

• carbohydrates

• lipids

• proteins

• nucleic acid