Under certain conditions, a chloroplast switches from non-cyclic to cyclic electron flow. What physiological condition usually triggers this shift to produce extra ATP?
Q1. Under certain conditions, a chloroplast switches from non-cyclic to cyclic electron flow. What physiological condition usually triggers this shift to produce extra ATP?
Answer: Low concentration of NADP+
Explanation: Cyclic flow occurs when NADP+ is low and ATP demand is high. Option D is incorrect because PSII is bypassed in this pathway.