Chemical Biology Part 2

The sequence of amino acids refers to which level of protein structure?

• Primary

• Secondary

• Tertiary

• Quaternary

Local three dimensional folding of the backbone of the polypeptide due to hydrogen bonding refers to which level of protein structure?

• Primary

• Secondary

• Tertiary

• Quaternary

Which of the following bonds/interactions is NOT paired correctly with the protein structure?

• Primary - peptide bonds

• Secondary - hydrogen bonds

• Tertiary - peptide bonds

• Quaternary - bydrophobic interactions

Alpha helices and beta pleated sheets are a result of which type of bonds?

• Peptide bonds

• Polypeptide bonds

• Phosphodiester bonds

• Hydrogen bonds

Polypeptides are molecules that contain multiple ___________.

• Phosphates

• Amino acids

• Monosaccharides

• Nucleic acids

A protein that consists of a single polypeptide has all of the following except?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure

• This protein has all of the above levels of structure

Which of the following is true of the protein myoglobin below. This structure is similar to hemoglobin.

• Myoglobin contains only alpha helices

• Myoglobin contains only beta pleated sheets

• Myoglobin contains both alpha helices and beta pleated sheets

• Myoglobin contains neither alpha helices or beta pleated sheets

Which of the following describes the function of the protein hemoglobin?

• To provide structure in skeletal muscle

• To break down proteins into amino acids

• To transport oxygen from your lungs to your tissues

• To maintain your body’s fluid balance

Which of the following statements about Sickle Cell Anemia is FALSE?

• A single amino acid change in the protein hemoglobin causes it

• Sickle-shaped red blood cells get stuck in blood vessels

• Normal hemoglobin molecules stick to each other forming long fibers

• Sickle cell anemia is a genetic disease

Which of the following properties do cancer cells possess?

• Stimulate their own growth

• Resist inhibitory signals that might otherwise stop their growth

• Resist programmed cell death

• Cancer cells possess all of the above traits