Exam 2: Molecules and Membranes

The sugar groups of glycolipids and glycoproteins are found on the outer surface of the plasma membrane.

What is the relationship between feedback inhibition and allosteric inhibition of enzyme activity?

Steroid hormones are derivatives of the membrane lipid _______.

Enzymes act by

Which of the following classes of amino acids is buried within the folded structure of the protein?

The activity of enzymes can be controlled by the binding of small molecules, by interaction with other proteins, and by covalent modifications.

Transmembrane proteins can span the lipid bilayer as

The major bonds in glycogen are _______ glycosidic bonds.

Water is a polar molecule and can form hydrogen bonds. How is this property of water an important factor in determining protein structure?

Coenzymes function in conjunction with enzymes to carry chemical groups between substrates.

A disulfide bond is formed between _______ residues.

Complementary base pairs form _______ bonds to direct replication of DNA.

Plants store glucose in the form of _______, and animals store glucose in the form of _______.

All of the following are ways in which enzyme activity can be regulated except

Transmembrane proteins that span the membrane are

Molecules that are partly water-soluble and partly water-insoluble are

Enzymes increase reaction rates without either being _______ themselves or altering the _______ of the reaction.

The scientist who first determined the complete amino acid sequence of a protein (insulin) was

Some enzymes participate directly in the chemical reactions they catalyze.

Integral membrane proteins typically possess _______ segments of 20−25 amino acids that traverse the membrane and are rich in _______ amino acids.