L:30 Metabolism Flashcards
1
Q
Important precursor to all nucleotides
A
(PRPP) 5-Phospho-a;pha-D-ribosyl-1-pyrophosphate
2
Q
Pyrimidines form nitrogenous base ______ of PRPP
A
independent
3
Q
de novo synthesis is a ______ pathway
A
Unidirectional
4
Q
Precursors used in de novo synthesis of ribonucleotides
A
NH3 from Gln
Asp
HCO3
5
Q
Allosteric regulation of synthesis
A
Pyrimidines inhibits Cytosine
Purines activates A/G
