Precursor of melanin is________________?

Related Mcqs:

1. The precursor of cholesterol synthesis is________________?

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

2. Melanin pigmentation in pregnancy is known as______________?

   A. Melasma
   B. Melanoma
   C. Epulis
   D. Melanosis

3. Disease which increase oral melanin pigmentation_______________?

   A. addison’s disease
   B. Hyperthyroidsim
   C. Nephritis
   D. All of the above

4. Which of the following is a precursor of protoporphyrin_______________?

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

5. The precursor of steroid is_______________?

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

6. The precursor of testosterone is_____________?

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

7. The immediate precursor of norepinephrine is______________?

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

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

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

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

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

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

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