BIO MISC / Biochemistry Exam 3 Review
Exam #3 TA Review
,BIO MISC / Biochemistry Exam 3 Review
1. Which amino acid residues are phosphorylated by kinases?
Answer: Serine (S), Tyrosine (Y), Threonine (T)
● An example of a very important
enzyme that is controlled via
phosphorylation is Glycogen
phosphorylase
● What do these 3 amino acids (serine,
threonine, tyrosine) have in common
which each other that allows them to
be phosphorylated?
,BIO MISC / Biochemistry Exam 3 Review
● Kinases phosphorylate. What is the
reversal of phosphorylation, and
what kind of enzyme catalyzes this
rxn?
,BIO MISC / Biochemistry Exam 3 Review
Glycocen phosphorylase displays allosteric regulation by multiple modes, which of thefollowing is
correct?
a. AMP promotes the conversion of R (active) to T
(inactive)
b. ATP favors the conversion of T(inactive) to R
(active)
c. Glucose promotes the conversion of T (inactive)
to R (active)
d. When ATP is needed immediately,
phosphorylation converts the enzyme from
allosterically regulated to an allosterically
unresponsive form
e. Phosphorylation id mediated by phosphoprotein
phosphatase
Exam #3 TA Review
,BIO MISC / Biochemistry Exam 3 Review
1. Which amino acid residues are phosphorylated by kinases?
Answer: Serine (S), Tyrosine (Y), Threonine (T)
● An example of a very important
enzyme that is controlled via
phosphorylation is Glycogen
phosphorylase
● What do these 3 amino acids (serine,
threonine, tyrosine) have in common
which each other that allows them to
be phosphorylated?
,BIO MISC / Biochemistry Exam 3 Review
● Kinases phosphorylate. What is the
reversal of phosphorylation, and
what kind of enzyme catalyzes this
rxn?
,BIO MISC / Biochemistry Exam 3 Review
Glycocen phosphorylase displays allosteric regulation by multiple modes, which of thefollowing is
correct?
a. AMP promotes the conversion of R (active) to T
(inactive)
b. ATP favors the conversion of T(inactive) to R
(active)
c. Glucose promotes the conversion of T (inactive)
to R (active)
d. When ATP is needed immediately,
phosphorylation converts the enzyme from
allosterically regulated to an allosterically
unresponsive form
e. Phosphorylation id mediated by phosphoprotein
phosphatase
