For glucose estimation in blood, the mode of transport from a PHC to lab:
Ans. A. Sodium fluorideIn glycolysis, (i.e. the pathway in which, glucose is utilized to form energy), 'Enolase' is an enzyme which converts 2- phosphoglycerate to a high energy compound phosphoenolpyruvate.a. This enzyme requires Mg++&Mn++ & is inhibited by fluoride.b. For blood glucose estimation, fluoride is added to the blood to prevent glycolysis by cells, so that the blood glucose is correctly estimated.
Sodium fluoride
EDTA
Citrate
0.9% saline
Carbohydrates