Exam 3: The Chemistry of Life: Organic Compounds

A disaccharide is composed of two monosaccharides joined by a glycosidic bond.

Hemoglobin consists of 574 amino acids arranged in four polypeptide chains.

A steroid consists of carbon atoms arranged in four attached rings. How many carbon atoms do three of the rings contain?

A molecule of a saturated triacylglycerol contains:

What substance is removed during a condensation reaction?

Figure 3-3 ​ The molecular fragment, represented in the accompanying figure is:

Cystic fibrosis is a genetic disease caused by the deletion of one amino acid in the cystic fibrosis transmembrane conductance regulator (CFTR) protein. This deletion changes the shape of the protein in dramatic ways, causing serious health issues. How can the deletion of one amino acid lead to such drastic results?

The carboxyl group can exist in either an ionized or nonionized form.

What is the functionality of regulatory proteins?

What factors allow carbon to be ideally suitable to serve as the "backbone" for large molecules?

Which functional group in cysteine residues can form bridges that help stabilize a protein's tertiary structure?

Glucose and fructose are ____ because they have identical molecular formulas but their atoms are arranged differently.

Condensation and hydrolysis reactions are catalyzed by the same enzymes.

Fats and steroids have very different functions. However, both are structurally related and share some of the same characteristics. Briefly, describe the similarities and differences between the two molecules.

Which of the following is sometime referred to as animal starch?

You isolate a compound that is insoluble in water, has alternating single and double bonds and has a bright orange color. You correctly conclude that this compound is a:

Assume that the shaded portions of the molecule in the accompanying figure each represent different polypeptide chains. What does this represent? ​ ​

Molecular chaperones mediate the folding of other protein molecules.