Respiration In Plants Ques 42
Poisons like cyanide inhibit $Na^{+}$ efflux and $K^{+}$ influx during cellular transport. This inhibitory effect is reversed by an injection of ATP. This demonstrates that [1994]
(a) ATP is the carrier portion in the transport system.
(b) energy for $Na^{+}-k^{+}$exchange pump comes from ATP.
(c) ATP is hydrolysed by ATPase to release energy.
(d) $Na^{+}-K^{+}$ exchange pump operates in the cell.
Show Answer
Answer : a
Hints & Solutions
(a) Active transport is the uphill movement of particles against their concentration gradient. Energy is utilised in the form of ATP. Cyanide inhibits soluble absorption by lowering respiration rate leading to formation of less ATP. Addition of ATP facilitates active transport. Immediate ATP supply minimises the effect of cyanide in normal aerobic respiration.
BETA
