What is unusual about the reaction catalyzed by ribonucleotide reductase?
A) It involves the conversion of -SH groups to -OH groups.
B) It uses a rare derivative of tetrahydrofolate.
C) It has a free radical mechanism.
D) This enzyme and its reaction occur only in a few species of archaebacteria.
Correct Answer:
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Q21: Substrates for reduction to form deoxyribonucleotides are
A)mononucleotides.
B)trinucleotides.
C)dinucleotides.
D)B
Q22: Which type of enzymes catalyze the phosphorylation
Q23: Which is the correct order for the
Q24: The source of the hydrogen to form
Q25: Which is used to synthesize CTP?
A)CMP.
B)GMP.
C)TMP.
D)UMP.
Q27: The pyrimidine ring system is shown below.What
Q28: Carbamoyl phosphate synthetase I is located in
Q29: Which catalytic site is not contained in
Q30: The reduction of ribonucleotides by ribonucleotide reductase
Q31: Which is the correct order for the
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