Question

Read the following statements regarding phosphorus:
(A). In normal P-sufficient plants, P-content varies from 0.1% to 0.4% by weight, which is 1/5th to 1/10th of N or K content.
(B). Phosphorus containing ATP is called the "Energy currency of the plants".
(C). Plant roots absorb P in the \(\text{H}_2\text{PO}_4^-\) form, but under neutral to alkaline environments, \(\text{HPO}_4^{2-}\) and or \(\text{PO}_4^{3-}\) ions could also be taken up.
(D). Phosphorus is a structural component of the nucleic acids (DNA and RNA), and also a constituent of fatty phospholipids.
Choose the correct answer from the options given below:

• A. (A), (B) and (D) only.
• B. (A), (B) and (C) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

At a soil pH of \(7.2\), \(\text{H}_2\text{PO}_4^-\) and \(\text{HPO}_4^{2-}\) exist in equal concentrations, representing the optimal pH range for phosphorus availability in many agricultural soils.

Answer 1

The Correct Option is C