1Consider the schematic shown of the catabolism of glucose L

1)Consider the schematic shown of the catabolism of glucose. Letters indicate key intermediates in the process. Select the best match for the questions below.

-What molecule does the letter K represent? (pyruvate, carbon dioxide, Acetyl CoA, NADH and FADH2, ATP. lactate and ethanol)

-What molecule does the letter H represent? (lactate or ethanol, pyruvate, carbon dioxide, NADH and FADH2, Acetyl CoA, ATP)

-What molecule(s) listed is/are generated between point K and point H? (ATP/FAD/and NAD+, NADH, NADH and ATP, NADH and FADH2, carbon dioxide and ATP, NAD+)

-What molecule(s) listed is/are generated between point K and point L? (NADH, NADH and ATP, NADH and carbon dioxide, carbon dioxide and ATP, NADH and FADH2, ATP/FAD/and NAD+)

- What molecule(s) listed is/are output at point M?(NADHand FADH2, NADH and ATP, ATP/FAD/NAD=?andwater, NADH, carbon dioxide and ATP)

-What molecules are output between point L to point N?(NADH and FADH2, NADH/FADH2/carbon dioxide/ATP, ATP, NADH and ATP, NADH, carbon dioxide and ATP)

2) Consider the schematic showing the catabolism of glucose. Select the best match for the following questions.

-What is the cyclic process between point L and point N?(fermentation, Kreb\'s cycle, oxidative phosporilation, glycolosis)

-What is the linear process between point N and point M?(fermentation, Kreb\'s cycle, oxidative phosporilation, glycolosis)

-What is the process from glucose to point H?(fermentation, Kreb\'s cycle, oxidative phosporilation, glycolosis)

-What is the process from glucose to point K?(fermentation, Kreb\'s cycle, oxidative phosporilation, glycolosis)

Solution

1)

2)

Explanation: Gllucose undergoes glycolysis to form K i.e pyruvate.Pyruvate converts to acetyl coenzyme A i.e L and enters the mitochondria to undergo Krebs cycle.In absence of oxygen,glucose undergoes anaerobic respiration or fermentation to form Lactate or ethanol i.e H.Accordingly with each step, we can record the molecules formed i.e either NAD+, NADH ,carbon dioxide,ATP or FADH2.