Proteins and Enzymes

Fill in the Blanks

Enzymes end in what 3 letters?

Match

What all do proteins do?

• enzymes

• structural

• motion

• defense

• regulation

speed up chemical reactions

keratin and collagen

muscle contraction

antibodies

hormones

• speed up chemical reactions

• keratin and collagen

• muscle contraction

• antibodies

• hormones

Multiple Choice

RECALL: What is the monomer for proteins?

• nucleic acid

• amino acid

• glucose

• fatty acid

Labeling

Label the amino acid.

Drag labels to their correct position on the image

amino group

carboxylic acid group

central carbon

variable side chain

Multiple Choice

What type of bond links the NH2 group of one amino acid to the COOH group of another during protein synthesis?

• Peptide bond

• Hydrogen bond

• Ionic bond

• Disulfide bond

Multiple Choice

Which level of protein structure is determined by the order of amino acids in the chain?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure

Multiple Choice

Which type of bond is primarily responsible for stabilizing the secondary and tertiary structure of proteins?

• Hydrogen bond

• Disulfide bridge

• Peptide bond

• Ionic bond

Multiple Select

Which of the following interactions are involved in stabilizing the tertiary structure of proteins?

• Hydrophobic interactions

• Disulfide bridges

• Ionic bonds

• Peptide bonds

• Hydrogen bonds

Open Ended

Why folding is important for protein function.

Multiple Choice

What happens to an enzyme when the temperature gets very hot?

• The reaction slows down because the molecules are moving too slowly.

• The reaction performs at the optimum speed.

• The reaction does not occur because the enzyme has denatured.

Multiple Choice

The protein structure that results from hydrogen bonds forming beta pleated sheets and alpha helices is:

• primary structure

• secondary structure

• tertiary structure

• quaternary structure

Multiple Choice

What does an enzyme do?

• slows down chemical reactions

• speeds up chemical reactions

• increases the temperature of the reaction

Multiple Choice

Identify the substrate in the diagram.

• A

• B

• C

• D

Multiple Choice

Identify the active site in the diagram.

• A

• B

• C

• D

Multiple Choice

What type of bonds link individual amino acids together?

• Hydrogen bonds
• Peptide bonds
• Ionic bonds
• Disulfide bridges

Open Ended

Reflecting on what you have learned about proteins, why do you think proteins are described as 'multipurpose molecules'?