Question

Chemicals like KCN and sodium azide ________.

• A. Inhibitis water absorption
• B. Enhances respiration
• C. Enhances photosynthesis
• D. All of the above

Answer 1

The correct option is A Inhibitis water absorption

Chemicals like potassium cyanide, antimycin, sodium azide and rotenone are common respiratory inhibitors. They affect the electron transport mechanism in mitochondria. Consequently ATP synthesis cannot occur. Hence, active absorption of water and solutes will not take place. However passive absorption may still occur, because it does not depends on ATP supply.