Which of the following is a precursor of protoporphyrin_______________?

A. Alanine
B. Leucine
C. Histidine
D. Glycine

Which of the following is precursor of adrenaline and thyroxine synthesis ?
A. Phenyl alanine B. Tyrosine C. Tryptophan D. None of the above...
Precursor of melanin is________________?
A. Phenylalanine B. Tryptophan C. Tyrosine D. Methionine...
Which of the following cell type is not a precursor of erythrocyte____________?
A. PR erythroblast B. Norm oblast C. Reticulocyte D. Myeloblast...
Which of the following vitamins is necessary for maturation of blood precursor cells________________?
A. Vit- A B. Thiamine C. Riboflavin D. Cyano cobalamine...
Which one of the following is a precursor of both gonadal and adrenocortical hormones_____________?
A. Progesterone B. Cortisol C. Testosterone D. Corticosterone...
The precursor of cholesterol synthesis is________________?
A. Acetic acid B. Acetyl CoA C. Oxalo acetic acid D. Pyruvate...
The precursor of steroid is_______________?
A. Amino acids B. Fatty acids C. Cholesterol D. None of the above...
The precursor of testosterone is_____________?
A. Aldosterone B. Methyl testosterone C. Estrogen D. Pregnenolone...
The immediate precursor of norepinephrine is______________?
A. Epinephrine B. Tyrosine C. Dopamine D. Phenylalanine...
Vitamin B12 acts as a coenzyme to which one of the following enzyme ?
A. Isocitrate dehydrogenase B. Homocyteine methyl transferase C. Glycogen synthase D. G-6-P dehydrogenase...