Essential Biochemistry - Vitamins (Section 5 - No. 49)
Which of the following is a precursor of Vitamin B9 (Folic acid)?
Pteridine Ring
Para-aminobenzoic acid (PABA)
Glutamic acid
All of the above
คำอธิบาย
Folic acid (Vitamin B9) is composed of a Pteridine ring, Para-aminobenzoic acid (PABA), and glutamic acid.