<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: Type of collagen maximum in skin:-
Options:
A. Type I
B. Type II
C. Type III
D. Type IV
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is A: Type I. Explanation: Collagen - the most abundant protein in mammals contains 4-hydroxyproline and 5-hydroxylysine. Vitamin C plays the role of a coenzyme in hydroxylation of proline and lysine while protocollagen is conveed to collagen The hydroxylation reaction is catalysed by lysyl hydroxylase (for lysine) and prolyl hydroxylase (for proline) This reaction is dependent on vitamin C, molecular oxygen and a-ketoglutarate Type Distribution I Noncailaginous connective tissues, including bone, tendon, skin II Cailage, vitreous humor III Extensible connective tissues, including skin, lung, vascular system IV Basement membranes<|im_end|>
