The key regulatory enzyme involved in the pyrimidine synthesis should be determined. Concept introduction: Pyrimidine is a heterocyclic nitrogenous base, which is found in the DNA and RNA. DNA has cytosine and thymine as pyrimidines, and RNA has uracil and cytosine has pyrimidines. It is a six-membered ring that contains two nitrogen atoms at 1 and 3 positions.

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Chapter 25, Problem 4P

Interpretation Introduction

Interpretation:

The key regulatory enzyme involved in the pyrimidine synthesis should be determined.

Concept introduction:

Pyrimidine is a heterocyclic nitrogenous base, which is found in the DNA and RNA. DNA has cytosine and thymine as pyrimidines, and RNA has uracil and cytosine has pyrimidines. It is a six-membered ring that contains two nitrogen atoms at 1 and 3 positions.

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