Protein Structure

Which of the following is a primary function of proteins in the body?

• Energy storage

• Enzyme activity

• Genetic information storage

• Photosynthesis

What type of bonding is NOT involved in maintaining a protein's shape?

• Hydrogen bonding

• Ionic bonding

• Metallic bonding

• Covalent bonding

Explain how hydrophobic interactions contribute to the structure of a protein.

• They cause the protein to unfold.

• They help stabilize the protein's structure by causing nonpolar side chains to fold inward.

• They form strong covalent bonds between amino acids.

• They increase the protein's solubility in water.

Describe the role of enzymes as a function of proteins and provide an example of an enzyme in the human body.

• Enzymes store genetic information; an example is DNA polymerase.

• Enzymes act as catalysts to speed up chemical reactions; an example is amylase.

• Enzymes provide structural support; an example is collagen.

• Enzymes transport oxygen; an example is hemoglobin.

Amino acids made by the body are​ (a)   Amino acids taken in from food are ​ (b)   ; when an amino acid that is normally made by the body, but for some reason can not be made, it becomes ​ (c)   . This means we have to get it from ​ (d)   .

• non essential.
• essential
• conditionally essential
• food
• the body

There are some other functions of protein. Match the protein tye with it's function.

• vision

• Fibrin

• Clotting

• Collagen

• forms scars

• Opsin

Which type of protein structure is characterized by alpha helices and beta sheets?

• Primary structure

• Tertiary structure

• Quaternary structure

• Secondary structure

What is the role of disulfide bonds in protein structure?

• They stabilize the protein's tertiary structure by forming covalent links between different parts of the polypeptide chain.

• They help in the transport of proteins across cell membranes.

• They increase the protein's solubility in water.

• They are involved in the primary structure of proteins.

Which of the following is NOT a function of proteins in the body?

• Immune response

• Genetic information storage

• Structural support

• Hormone regulation

What is the primary role of chaperone proteins in the cell?

• To degrade misfolded proteins

• To transport proteins across membranes

• To provide energy for protein synthesis

• To assist in the proper folding of other proteins