Question

Which one of the following is not the correct statement?

• A. Nitrogen deficiency symptoms first appear in younger leaves.
• B. Phosphorous is a structural component of cellular energy currency.
• C. The ionic concentration of potassium in guard cells regulate stomatal movement.
• D. Cytochrome 'c' is a copper containing protein.

Answer 1

The correct option is A Nitrogen deficiency symptoms first appear in younger leaves.

Nitrogen is a mobile element. Under conditions of nitrogen deficiency, nitrogen is actively mobilised from old and senescing leaves and transported to younger leaves. Thus, deficiency symptoms of nitrogen first appear in old leaves.