Question

In the callus of tobacco, which of the following shall induce shoot differentiation in the combination of auxin and cytokinin?

• A. Higher concentration of cytokinin and lower concentration of auxin
• B. Lower concentration of cytokinin and higher concentration of auxin
• C. Only cytokinin and no auxin
• D. Only auxin and no cytokinin

Answer 1

Answer: (A)

Higher concentration of cytokinin and lower concentration of auxin

A. Higher concentration of cytokinin and lower concentration of auxin

Solution : Higher concentration of cytokinin should be given to a tobacco callus that initiates more cell division and differentiation. The auxin promotes the growth of meristematic cells and shoot elongation.

So the correct answer is " Higher concentration of cytokinin and lower concentration of auxin"