Respiratory path way in living cell better to considera)Catabolic pathwayb)Anabolic pathwayc)Amphibolic pathwayd)None of theseCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Opt c because respiration exhibits both catabolic pathway and anabolic pathway so amphibolic pathway..

Answer

In living cells respiratory pathway follows amphibolic pathway. It means it exhibit catabolic and anabolic pathway.

Answer

Respiratory pathway in living cell is better to consider amphibloic pathway.. it exhibits both catabolic and anabolic activities .so answer is option C

Answer

The correct answer is option 'C', which states that the respiratory pathway in a living cell is an amphibolic pathway. Let's understand why this is the correct answer.

An amphibolic pathway is a metabolic pathway that has the characteristics of both catabolic and anabolic pathways. It means that it can function both to break down molecules (catabolism) and to synthesize molecules (anabolism). The respiratory pathway in a living cell fits this definition perfectly.

Respiration is a series of biochemical reactions that occur in the cells of organisms to produce energy in the form of ATP (adenosine triphosphate). It involves the oxidation of organic molecules, such as glucose, to produce carbon dioxide, water, and ATP. The overall process of respiration can be divided into three main stages: glycolysis, the Krebs cycle (also known as the citric acid cycle or TCA cycle), and oxidative phosphorylation (electron transport chain).

Let's break down the respiratory pathway and see how it is an amphibolic pathway:

1. Glycolysis:
- Glycolysis is the first step of respiration and occurs in the cytoplasm of the cell.
- It is a catabolic pathway as it breaks down glucose (a six-carbon molecule) into two molecules of pyruvate (a three-carbon molecule).
- During glycolysis, a small amount of ATP is produced, along with NADH (an energy carrier) and two molecules of pyruvate.

2. Krebs Cycle:
- The pyruvate molecules produced in glycolysis enter the mitochondria where they are further oxidized in the Krebs cycle.
- The Krebs cycle is an amphibolic pathway as it serves as a common pathway for both catabolism and anabolism.
- It catabolically breaks down acetyl-CoA (derived from pyruvate) to produce energy-rich molecules such as NADH, FADH2, and ATP.
- It also provides intermediates for anabolic reactions such as the synthesis of amino acids, nucleotides, and other biomolecules.

3. Oxidative Phosphorylation:
- The final stage of respiration is oxidative phosphorylation, which occurs in the inner membrane of the mitochondria.
- It is a catabolic pathway as it utilizes the energy stored in NADH and FADH2 to generate ATP through the electron transport chain.
- The electron transport chain involves a series of redox reactions that ultimately lead to the production of ATP.

In summary, the respiratory pathway in a living cell is an amphibolic pathway because it involves both catabolic and anabolic reactions. Glycolysis and oxidative phosphorylation are catabolic processes, whereas the Krebs cycle serves as a common pathway for both catabolism and anabolism, providing intermediates for the synthesis of biomolecules.

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