macromolecules, cell membrane and metabolism

Question 1

The linkage of an amino acid to another amino acid in a protein is referred to as a(n):
A: phosphodiester bond
B: glycosidic bond
C: peptide bond
D: R group
E: ionic

Answer 1

C: peptide bond

Question 2

All the options are a component of an amino acid except
A: A carboxyl group
B: An amino group
C: An R group
D: An alpha carbon
E: a phosphate group

Answer 2

E: A phosphate group

Question 3

Which component of an amino acid differs from on amino acid to another
A: The carboxyl group
B: The amino group
C: The a-carbon atom
D: the hydrogen atom opposite the R group
E: The side chain

Answer 3

E: The side chain

Question 4

Which force can contribute to a protein’s tertiary structure
A: Hydrophobic interactions
B: covalent bonding
C: All of these choices are correct
D: hydrogen bonding
E: ionic bonding

Answer 4

C: All of these choices are correct

Question 5

For a folding domain that forms a sort “fist” with certain amino acid R groups buried within and other R groups mainly face “out” and hydrophilic R groups mainly face “in”.

True
False

Answer 5

False

Question 6

The unfolding of a protein by heat or chemical treatment is referred to as:
A: disaggregation
B: uncoupling
C: denaturation
D: depolymerization
E: hydrolysis

Answer 6

C: Uncoupling

Question 7

All polypeptides have quaternary structure

True
False

Answer 7

False

Question 8

secondary structures are stabilized by which type of interaction?
A: disulfide linakges
B: hydrophiid clustering
C: ionic bonding
D: van der Waals forces
E: hydrogen bonding

Answer 8

E: hydrogen bonding

Question 9

Which amino acid is capable of forming a disulfide linkage wen positioned near another amino acid of the same type?
A: Arginine
B: isoleucine
C: methionine
D: tyrosine
E: cysteine

Answer 9

E: Cysteine