Test Review

Chemical reactions can either absorb or release energy. Which of the following is needed for all chemical reactions to begin?

• substrates

• enzymes

• activation energy

• products

When enzymes become denatured, the shape of the enzyme can change. What is the result of the enzyme changing shape?

• The enzyme becomes more efficient

• The enzymes get used up in the reactions

• The shape of the enzyme is not important

• The active site becomes damaged

There are many enzymes in living things that perform many different jobs. Karl did a lab in class about the enzyme amylase that is in human saliva. Which statement is FALSE about the function of amylase.

• Amylase is an enzyme found in the stomach.

• Amylase breaks starch into glucose.

• Amylase catalyzes a chemical reaction in the mouth.

• Amylase requires heat to break down molecules.

Which of the following statements BEST describes the purpose of enzymes in living organisms?

• Enzymes need to be constantly replaced because they are used in reactions.

• Enzymes break bonds of molecules to release energy

• Enzymes create bonds of molecules to store energy

• Enzymes lower the amount of energy needed for chemical reactions.

Each macromolecule is made of smaller units called monomers. Which of the following is the monomer of carbohydrates?

• Glycerol & Fatty Acid

• Monosaccharide (glucose)

• Amino Acid

• Nucleotides

Each macromolecule is made of smaller units called monomers. Which of the following is the monomer of proteins?

• Monosaccharide (glucose)

• Nucleotides

• Glycerol & Fatty Acid

• Amino Acid

Each macromolecule is made of smaller units called monomers. Which of the following is the monomer of lipids?

• Amino Acid

• Glycerol & Fatty Acid

• Monosaccharide (glucose)

• Nucleotides

Each macromolecule is made of smaller units called monomers. Which of the following is the monomer of nucleic acids?

• Amino Acid

• Glycerol & Fatty Acid

• Monosaccharide (glucose)

• Nucleotides

Macromolecules each have specific functions in all living organisms, both plants and animals. Which macromolecule is the main energy source of animals and provides structure to plants?

• Lipids

• Nucleic Acids

• Proteins

• Carbohydrates

What process allows macromolecules to be broken down into their monomers by enzymes using water?

• activation energy

• Hydrolysis

• Buffering

• Dehydration Synthesis