NTA Abhyas NEET2020BotanyRespiration in PlantsPractice
The correct sequence of cytochromes in ETC is
Options
- ACyt a, b, c, a 3
- BCyt b, c 1 , c , a , a 3
- CCyt b , a , a 3 , c
- DCyt b , c , a 3 , a
Correct answer
B. Cyt b, c 1 , c , a , a 3
Step-by-step solution
Cytochromes are proteins with characteristic strong absorption of visible light due to their iron-containing heme prosthetic groups. Mitochondria contain three classes of cytochromes designated a, b and c distinguished by differences in their light absorption spectra. The cytochrome of type a and b and some of type c are integral proteins of inner mitochondrial membrane. The sequence of electron carriers in ETS is: NADH → Q → Cyt b → Cyt c 1 →Cyt c → Cyt a → Cyt a 3 → O 2