Which of the following vitamin act as a respiratory catalyst?

(A) B₂ 

(B) Pyridoxine 

(C) B₁₂ 

(D) C

Dicoumarol is antagonist to 

(A) Riboflavin 

(B) Retinol 

(C) Menadione 

(D) Tocopherol

In the individuals who are given liberal quantities of vitamin C, the serum ascorbic acid level is 

(A) 1–1.4 µg/100 ml 

(B) 2–4 µg/100 ml 

(C) 1–10 µg/100 ml 

(D) 10–20 µg/100 ml

Levels of serum calcium and inorganic phosphorus are increased in 

(A) Hypervitaminosis D 

(B) Hypoparathyroidism 

(C) Hypovitaminosis D 

(D) None of these

Whole wheat is an excellent source of 

(A) Vitamin D 

(B) Vitamin C

(C) Vitamin A 

(D) Thiamine

The molecule of vitamin A₁ contains 

(A) Benzene ring 

(B) β-Ionone ring 

(C) β-Carotene ring 

(D) None of these

This is a rich source for vitamin C. 

(A) Rice 

(B) Milk 

(C) Egg 

(D) Lemon

Cholesterol is a precursor in the bio genesis of 

(A) Vitamin A 

(B) Vitamin D 

(C) Vitamin E 

(D) None of these

Niacin is synthesized in the body from 

(A) Tryptophan 

(B) Tyrosine 

(C) Glutamate 

(D) Aspartate

Retinol and Retinol binding protein are bound with this protein: 

(A) Albumin 

(B) Prealbumin 

(C) α-globulin 

(D) β-globulin