A) myosin
B) actin
C) collagen
D) tubulin.
Correct Answer: C
Solution :
: Collagen in young conditions is flexible, permeable and easily soluble. As the age advances of it gradually becomes less elastic, less permeable and insoluble. Due to these changes the nutritive substances and oxygen are not allowed to diffuse in the cells easily and on the other hand nitrogenous waste matter and carbon dioxide do not pass out of the cell. The reduction in the process of diffusion to and from the cell may result in the deterioration and ageing of the cell and ultimately the organism.
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