Proteins & Enzymes Flashcards
Which of the following statements does anabolic reactions include?
a. Hydrolysis of macromolecules into monomers in digestion
b. The formation of lactic acid in anaerobic respiration
c. Oxidation of substrates in respiration
d. Formation of macromolecules from monomers by condensation
d. Formation of macromolecules from monomers by condensation
What is meant by the term “induced-fit binding”?
a. Substrate and active sites are complementary in shape
b. Both substrate and enzymes change shape when binding occurs
c. Enzymes bind to a specific substrate
d. Enzymes can be immobilized
b. Both substrate and enzymes change shape when binding occurs
Which statement applies to enzymes?
a. Enzyme function depends on collisions between substrate and active sites
b. One active site typically binds to a broad range of substrates
c. The active site on the substrate is specific to one enzyme
d. When enzymes are immobilized they stop working
a. Enzyme function depends on collisions between substrate and active sites
What is a common feature of enzymes?
a. they all react with substrates
b. they all decrease the rate of reaction
c. they are all secreted from cells in vesicles
d. they all bind to the active site of their substrate
a. they all react with substrates
How do R group interactions contribute to protein structure?
Options:
I. Determining the sequence of amino acids in the primary structure
II. Stabilizing beta pleated sheets in the secondary structure
III. Stabilizing further foldings of a polypeptide into a tertiary structure
Answers:
a. I only
b. II and III only
c. III only
d. I, II, and III
c. III only
Which statement about the primary structure of a protein is not correct?
a. It is unique to that protein
b. It is the sequence of amino acids in that protein from the N to C terminus
c. It is hydrogen bonded
d. It determines the three-dimensional shape of the folded protein molecule
c. It is hydrogen bonded
