Fill in the blanks. ___________ is synthesized from glutamine for pyrimidine biosynthesis, but for amino acid catabolism, it is derived from ____________ bicarbonate.

MCQS on the biological importance of organic molecules. Topics include bioorganic mechanisms, chirality, lipids, carbohydrates, animo acids, peptides, proteins, nucleic acids, enzymes, coenzymes, and coupled reactions, and lipid, carbohydrate, amino acid, and nucleotide metabolism.