FOOD TECHNOLOGY

FOOD PROCESSING AND PRESERVATION

FERMENTATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In what step of cellular respiration is glucose broken down?
A
Aerobic Respiration
B
Krebs Cycle
C
Electron Transport Chain
D
Glycolysis
Explanation: 

Detailed explanation-1: -Glycolysis is the first step in cellular respiration that occurs in the cytoplasm within the mitochondria. Glycolysis is the process in which glucose six-carbon sugar molecule is broken down into 3C molecules to generate cellular energy.

Detailed explanation-2: -Glycolysis is the process by which glucose is broken down within the cytoplasm of a cell to form pyruvate. Under aerobic conditions, pyruvate can diffuse into mitochondria, where it enters the citric acid cycle and generates reducing equivalents in the form of NADH and FADH2.

Detailed explanation-3: -During glycolysis, glucose ultimately breaks down into pyruvate and energy; a total of 2 ATP is derived in the process (Glucose + 2 NAD+ + 2 ADP + 2 Pi–> 2 Pyruvate + 2 NADH + 2 H+ + 2 ATP + 2 H2O). The hydroxyl groups allow for phosphorylation. The specific form of glucose used in glycolysis is glucose 6-phosphate.

Detailed explanation-4: -After the second turn through the Citric Acid Cycle, the original glucose molecule has been broken down completely. All six of its carbon atoms have combined with oxygen to form carbon dioxide.

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