Connection Between Breathing and Energy Release — NEET Biology
📚 Practice ConceptYou may wonder at the several questions raised above – they may seem to be very disconnected. But in reality, the process of breathing is very much connected to the process of release of energy from food. Let us try and understand how this happens.
Which of the above statements are correct regarding the step-wise release of energy in cellular respiration? S1: The complete oxidation of glucose in cellular respiration occurs through a single explosive reaction, releasing all energy at once to maximize heat generation. S2: Energy released during the series of step-wise reactions in respiration is directly usable for metabolic activities without conversion into ATP. S3: The strategy of multi-step oxidation of glucose ensures that energy released can be coupled to ATP synthesis, thereby capturing it gradually rather than losing it as excessive heat. S4: Molecules like NADH + H+ and FADH2 serve as temporary energy carriers, storing energy from earlier catabolic steps to be utilized later for ATP production through oxidative phosphorylation. S5: The process of oxidative phosphorylation in respiration involves light energy for creating a proton gradient, similar to photophosphorylation in photosynthesis.
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