BCECE Medical BCECE Medical Solved Papers-2005

  • question_answer
    Richest energy compound is :

    A)  creatinine phosphate

    B)  ATP

    C)  carbohydrate

    D)  fat

    Correct Answer: D

    Solution :

    Fat contains more energy as compared to carbohydrate and protein. It is not directly used in respiration instead first broken down to intermediates common to glucose oxidation. i.e., acetyl Co-A, glyceraldehyde phosphate. The most common respiratory substrate is glucose (carbohydrate). It is formed from stored carbohydrates and yields 38-ATP on oxidation. In adenosine triphosphate last two phosphate radicals are attached by bonds of high transfer potential. They are also called energy rich bonds. The bond between second and third phosphate radical gives 8.15 kcal/mole while the bond between second and first phosphate radical gives 6.5 kcal/mole energy on hydrolysis.


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