Plant Cell Culture
Which of the following is used in the culture of regenerating protoplasts, single cells or very dilute cell suspensions?

Nurse or feeder culture
None of these
Both (a) and (b)
Nurse medium

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Plant Cell Culture
In a callus culture

only auxin is required for root and shoot formation
auxins and cytokinins are not required
increasing level of auxin to a callus induces shoot formation and increasing level of cytokinin promote root formation
increasing level of cytokinin to a callus induces shoot formation and increasing level of auxin promote root formation

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