Question

The given figure illustrates the conversion of glucose into ethanol, a key process of anaerobic energy transformation in some organisms.
The best explanation for this is that

• A. Step 1 illustrates that ATP hydrolysis is an energetically favorable exergonic reaction that couples the free energy released when ATP forms ADP and Pi (inorganic phosphate) with the endergonic conversion of glucose into pyruvate.
• B. NADH is oxidized during step 1 and reduced during step 3.
• C. Step 1 illustrates the phosphorylation of ADP into ATP, which is coupled to the energetically favorable conversion of glucose into pyruvate.
• D. In step 1 ATP is oxidized and glucose is reduced, and it is this coupling that provides the energy to drive ethanol production.

Answer 1

The correct option is C Step 1 illustrates the phosphorylation of ADP into ATP, which is coupled to the energetically favorable conversion of glucose into pyruvate.

The process of glycolysis is identical in both aerobes and anaerobes to produce pyruvic acid, where two ATP molecules are used for converting Glucose to fructose 1,6 bisphosphate, that is then split into 2, 3 carbon compound pyruvic acid

So, the correct answer is 'Step 1 illustrates the phosphorylation of ADP into ATP, which is coupled to the energetically favorable conversion of glucose into pyruvate'