Which of the following is a precursor of protoporphyrin_______________?

Related Mcqs:

1. Which of the following is precursor of adrenaline and thyroxine synthesis ?

   A. Phenyl alanine
   B. Tyrosine
   C. Tryptophan
   D. None of the above

2. Precursor of melanin is________________?

   A. Phenylalanine
   B. Tryptophan
   C. Tyrosine
   D. Methionine

3. Which of the following cell type is not a precursor of erythrocyte____________?

   A. PR erythroblast
   B. Norm oblast
   C. Reticulocyte
   D. Myeloblast

4. Which of the following vitamins is necessary for maturation of blood precursor cells________________?

   A. Vit- A
   B. Thiamine
   C. Riboflavin
   D. Cyano cobalamine

5. Which one of the following is a precursor of both gonadal and adrenocortical hormones_____________?

   A. Progesterone
   B. Cortisol
   C. Testosterone
   D. Corticosterone

6. The precursor of cholesterol synthesis is________________?

   A. Acetic acid
   B. Acetyl CoA
   C. Oxalo acetic acid
   D. Pyruvate

7. The precursor of steroid is_______________?

   A. Amino acids
   B. Fatty acids
   C. Cholesterol
   D. None of the above

8. The precursor of testosterone is_____________?

   A. Aldosterone
   B. Methyl testosterone
   C. Estrogen
   D. Pregnenolone

9. The immediate precursor of norepinephrine is______________?

   A. Epinephrine
   B. Tyrosine
   C. Dopamine
   D. Phenylalanine

10. 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