The instantaneous source of energy is

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(D) In cellular respiration,whether aerobic or anaerobic,$Glucose$ is the primary substrate that undergoes oxidation to produce energy in the form of

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Glucose

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(D) In cellular respiration,whether aerobic or anaerobic,$Glucose$ is the primary substrate that undergoes oxidation to produce energy in the form of $ATP$.In plants,$Glucose$ is derived from $Sucrose$,which is the end product of photosynthesis or from stored carbohydrates.$Sucrose$ is converted into $Glucose$ and $Fructose$ by the enzyme $Invertase$ to enter the first step of respiration,known as the $Glycolytic$ pathway.Because $Glucose$ is a simple sugar that enters the respiratory pathway directly,it serves as the most immediate or instantaneous source of energy for the cell.

Similar Questions

Which one is the correct sequence in glycolysis?

Choose the correct option:
$(1)$ Glucose and fructose are phosphorylated by the enzyme transferase/hexokinase to form glucose $6$-phosphate.
$(2)$ In fermentation,yeast converts glucose into ethanol under aerobic/anaerobic conditions.

Which of the following processes should not operate when organic acids are used as respiratory substrates?

The enzyme that catalyzes the conversion of glucose into glucose-$6$-phosphate is:

The common step of both aerobic and anaerobic respiration is:

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