Question

Select the correct option:
i. Potassium is absorbed as a divalent ion.
ii. Potassium is required in more quantities in meristematic tissues, buds, leaves, root tips.
iii. Potassium is found in 2 amino acids- cysteine & methionine.

• A. Only i is correct
• B. Only i & ii are correct
• C. Only ii is correct
• D. Only ii & iii are correct

Answer 1

The correct option is C Only ii is correct

Potassium is absorbed as a monovalent cation (ion having only one positive charge) and not divalent cation (ion having two positive charges).

It is required in large quantities in meristematic tissues, buds, leaves, root tips. It helps maintain ionic balance in cells. It is also involved in protein synthesis, opening & closing of stomata, enzyme activation & maintenance of turgidity in cells.

Sulphur is found in 2 amino acids - cysteine and methionine. It is absorbed by plants as a sulphate anion. It is also a component in vitamins, coenzymes & ferredoxin.