Respiration in Plants Test - 5

Aerobic respiration is the complete oxidation of sugars in presence of oxygen.

The carbohydrates are broken down into CO₂ and H₂O and this releases energy. This energy is stored in the form of ATP and later used in the body.

So, the correct option is 'Carbon dioxide, water, and energy'.

The NADH carries electrons to the oxidative phosphorylation step of cellular respiration, which occurs inside of the mitochondrion Water (H₂O) and ATP (energy carrier) At the end of electron transport, oxygen is the final electron acceptor, and it combines also with hydrogen ions to form H₂O.

In the mitochondrial electron transport chain, electrons move from an electron donor (NADH or QH2QH2) to a terminal electron acceptor (O2O2) via a series of redox reactions. These reactions are coupled to the creation of a proton gradient across the mitochondrial inner membrane. There are three proton pumps: I, III, and IV. The electron carriers in ETS includes co-enzyme Q, cytochrome c, cytochrome a and cytochrome a3a3. But, H₂OH₂O does not act as electron carrier. Water is not a carrier but a by-product of respiration.

Thus, the correct answer is option B.

Krebs cycle occurs inside the matrix of mitochondria.The cycle is also known as the citric acid cycle or tricarboxylic acid cycle. It includes stepwise oxidative and cyclic degradation of activated acetate derived from pyruvic acid.