Question

At the complete end of cellular respiration, how many molecules of ATP are produced? A. 26 B. 38 C. 15 D. 34

Answer 1

The best answer would be B 38 molecules of ATP.

According to some of newer sources the ATP yield during aerobic respiration is not 36–38, but only about 30–32 ATP molecules / 1 molecule of glucose. So in new textbooks 30-32 molecules is stated but that’s not a choice in ur question.

Hope this helps

Answer 2

Answer:

The correct answer will be option B (38).

Explanation:

Cellular respiration or oxidation of glucose proceeds in three sequential reactions: .Glycolysis, Kreb cycle and Electron transport chain (ETC)

 1 NADH₂ produces 3 ATP

 1 FADH₂ produces 2 ATP

During Glycolysis produce -

NADH₂- 2 molecules        =2x3 =   06 ATP

                                           =2x4 =   08 ATP  depending on shuttle system

ATP-phosphorylation                   = 02 ATP (utilized during process)                                                

So, net ATPs synthesized in glycolysis are -  08 ATP.

During Link reaction and Krebs cycle -

NADH₂- 8 molecules = 8x3=           24 ATP

FADH₂- 2 molecules = 2x2=            04 ATP

ATP-phosphorylation=                     02 ATP

so, net ATP produced in Link reaction and Krebs cycle are=  30 ATP

Hence, 08 ATP from glycolysis and 30 ATP from link and kreb cycle forms 38 ATP.

Thus, option B is the correct answer.