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Addition of which of the following exhaustively 14C labeled substrates would lead to evolution of 14CO2 from a
cell-free suspension containing all the enzymes and substrates required for the synthesis of uridylic acid?


A. Aspartate

B. Carbamoyl phosphate

C. Glutamine

D. Glycine

E. N10-Formyltetrahydrofolate

AAAAAAAAA. Is the first step of pyrimidine synthesis

I know that the answer maybe present in kaplan, but honestly, can anyone please tell me after how many readings we will be able to answer such question from memory ?

I guess we have to memorize as much as we can.