NTA Abhyas NEET2020BotanyRespiration in PlantsPractice
Which of the following is true regarding the given electron transport chain? C o Q → Cyt c → Cyt aa 3 → O 2
Options
- ACoQ → Cyt c is H + absorbing site
- Baa 3 → O 2 , H + yielding site
- CCoQ → Cyt c is H + yielding site and aa 3 → O 2 is H + absorbing site
- DNo H + is absorbed or released
Correct answer
C. CoQ → Cyt c is H + yielding site and aa 3 → O 2 is H + absorbing site
Step-by-step solution
In electron transport chain electrons transport through a series of carriers. H + of NADH + (received from krebs cycle) is accepted by FAD as a result of which FAD is reduced to FADH + and NADH + is oxidised to NAD. Reduced FADH + is oxidised by CoQ, with the formation of CoQH + . H + ions then move to Cyt b, then Cyt c, Cyt a and Cyt aa 3 . Ultimately these H + are accepted by O 2 and H 2 O is formed.