Q. I. $H_{2}S$ not $H_{2}O$ is involved in photosynthesis of sulphur bacteria II. ATP is produced during light reaction $via$ chemiosmosis III. Absence of light leads to the stoppage of photosynthesis IV. Calvin cycle occurs in grana Select the correct option
A) II, III and IV
B) I, III and IV
C) I, II and IV
D) I, II and III
Explanation
Calvin cycle occurs in the stroma not grana. During the Calvin cycle, synthesis of starch takes place Photosynthetic reaction in purple sulphur bacteria $2H_{2}S + CO_{2}\overset{\ \ Light\ \ \ }{\rightarrow}2S + CH_{2}O + H_{2}O$ Absence of light leads to the stoppage of splitting of water which causes stoppage of photosynthesis
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.