1 of 28
Term
S-adenosylmethionine (SAM) is synthesized from ATP and methionine.
A deficiency in which of the following enzymes would impair the
production of SAM?
Give this one a try later!
, Methionine
adenosyltransferase (MAT);
Methionine Cystathionine beta-synthase; this
adenosyltransferase (MAT) is enzyme is involved in homocysteine
the enzyme required for the metabolism.
metabolism of methionine to
SAM.
Serine hydroxymethyltransferase; this
Adenylate kinase; this enzyme is
enzyme is involved in serine and
involved in atp metabolism.
glycine metabolism.
Don't know?
2 of 28
Term
The ribonucleotide reductase is important for converting ribose bases
to the deoxy form. This conversion is coupled with the oxidation of
which of the following compounds?
Give this one a try later!
Tetrahydrobiopterin (BH4); Deficiency of tetrahydrobiopterin (BH4) would impair
phenylalanine metabolism to tyrosine and result in phenylketonuria.
, Increased amino acids in the blood; NAGs is an essential activator of carbamoyl
phosphate synthetase I which catalyzes the first step in the urea cycle. Loss of this
activator will decrease urea cycle activity resulting in an increase in amino acids in
the blood
Thioredoxin; The reaction is coupled with thioredoxin reductase, reduced
thioredoxin and the reductase. In the reaction, thioredoxin is oxidized. This
compound is re-reduced by NAPDH so it can be regenerated as part of the
reaction.
Phenylalanine hydroxylase; Phenylalanine hydroxylase is the enzyme responsible
for converting phenylalanine to tyrosine. Deficiencies of the enzyme can result in an
accumulation of phenylalanine
Don't know?
3 of 28
Term
Which of the following reactions of the urea cycle takes place in the
mitochondria?
Give this one a try later!
The breakdown of arginine to The synthesis of carbamoyl
ornithine phosphate
Term
S-adenosylmethionine (SAM) is synthesized from ATP and methionine.
A deficiency in which of the following enzymes would impair the
production of SAM?
Give this one a try later!
, Methionine
adenosyltransferase (MAT);
Methionine Cystathionine beta-synthase; this
adenosyltransferase (MAT) is enzyme is involved in homocysteine
the enzyme required for the metabolism.
metabolism of methionine to
SAM.
Serine hydroxymethyltransferase; this
Adenylate kinase; this enzyme is
enzyme is involved in serine and
involved in atp metabolism.
glycine metabolism.
Don't know?
2 of 28
Term
The ribonucleotide reductase is important for converting ribose bases
to the deoxy form. This conversion is coupled with the oxidation of
which of the following compounds?
Give this one a try later!
Tetrahydrobiopterin (BH4); Deficiency of tetrahydrobiopterin (BH4) would impair
phenylalanine metabolism to tyrosine and result in phenylketonuria.
, Increased amino acids in the blood; NAGs is an essential activator of carbamoyl
phosphate synthetase I which catalyzes the first step in the urea cycle. Loss of this
activator will decrease urea cycle activity resulting in an increase in amino acids in
the blood
Thioredoxin; The reaction is coupled with thioredoxin reductase, reduced
thioredoxin and the reductase. In the reaction, thioredoxin is oxidized. This
compound is re-reduced by NAPDH so it can be regenerated as part of the
reaction.
Phenylalanine hydroxylase; Phenylalanine hydroxylase is the enzyme responsible
for converting phenylalanine to tyrosine. Deficiencies of the enzyme can result in an
accumulation of phenylalanine
Don't know?
3 of 28
Term
Which of the following reactions of the urea cycle takes place in the
mitochondria?
Give this one a try later!
The breakdown of arginine to The synthesis of carbamoyl
ornithine phosphate
