337917
You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
1 IAA and gibberellin
2 auxin and cytokinin
3 auxin and abscisic acid
4 gibberellins and abscisic acid
Explanation:
Root and shoot formation during tissue culture requires hormones. Cytokinin and auxin in fixed proportions. A low auxin to cytokinin ratio promotes shoot formation whereas a high auxin to cytokinin ratio promotes rooting of callus.
NEET - 2017
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337918
Which hormone encounters apical dominance induced by cytokinin?
1 IAA
2 Cytokinin
3 ABA
4 None of them
Explanation:
Cytokinin causes lateral dominance, not apical dominance.
NEET Test Series from KOTA - 10 Papers In MS WORD
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BIOXI15: PLANT GROWTH AND DEVELOPMENT
337917
You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
1 IAA and gibberellin
2 auxin and cytokinin
3 auxin and abscisic acid
4 gibberellins and abscisic acid
Explanation:
Root and shoot formation during tissue culture requires hormones. Cytokinin and auxin in fixed proportions. A low auxin to cytokinin ratio promotes shoot formation whereas a high auxin to cytokinin ratio promotes rooting of callus.
NEET - 2017
BIOXI15: PLANT GROWTH AND DEVELOPMENT
337918
Which hormone encounters apical dominance induced by cytokinin?
1 IAA
2 Cytokinin
3 ABA
4 None of them
Explanation:
Cytokinin causes lateral dominance, not apical dominance.