Question:

The first phase in the breakdown of glucose, in animal cell, is

Updated On: Jul 29, 2022
  • oxidative phosphorylation
  • Kreb's cycle
  • glycolysis
  • E.T.C
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The Correct Option is C

Solution and Explanation

Glycolysis is the first step of glucose breakdown in both animals and plants. During glycolysis 6-carbon glucose molecule is converted into 2 molecules of 2 carbon pyruvic acid. In this process net gain of 2 ATP and 2 NADH, occurs. It is a common pathway for both aerobic and anaerobic modes of respiration. The Kreb's cycle pathway and ETS then follow glycolysis for complete breakdown of glucose. The pyruvic acid formed enters Krebs cycle in aerobic respiration and ethanol is formed by fermentation in anaerobic respiration.
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Concepts Used:

Glycolysis

What is Glycolysis?

It is the process in which glucose is broken down to produce energy. It produces two molecules of pyruvate, ATP, NADH and water. If the process takes place in cytoplasm of a cell and it does not require oxygen. It occurs in both aerobic and anaerobic organisms.

Glycolysis Pathway