Question

Which of the following statements are correct? (i)$\quad$ Solution culture/hydroponics contains all essential minerals except $\quad$ $\quad$one, the usefulness of which is to be determined. (ii) $\quad$Na, Si, Co and selenium are beneficial element required by $\quad$ $\quad$ $\quad$ $\quad$higher plants. (iii) $\quad$Zn is the activator of nitrogenases while Mo is the activator of $\quad$ $\quad$ $\quad$ $\quad$alcohol dehydrogenase. (iv) $\quad$Zn is needed for auxin synthesis.

• A. (i), (ii), (iii)
• B. (i), (ii), (iv)
• C. (i) and (iv)
• D. None of these

Answer 1

Answer: (B)

(i), (ii), (iv)

Answer 2

Zinc (Zn) is an activator of alcohol dehydrogenase and Mo of nitrogenase during nitrogen metabolism.