Questions and answers for exam Preparation

MCQs

Total Questions : 40 | Page 3 of 4 pages

Question 21. What is meant by 'Organ culture' ?

Maintenance alive of a whole organ, after removal from the organism by partial immersion in a nutrient fluid
Introduction of a new organ in an animal body with a view to create genetic mutation in the progenies of that animal
Cultivation of organs in a laboratory through the synthesis of tissues
The aspects of culture in community which are mainly dedicated by the need of a specified organ of the human body

Discuss Question

Answer: Option A. -> Maintenance alive of a whole organ, after removal from the organism by partial immersion in a nutrient fluid

Question 22.
Protoplasts can be produced from suspension cultures, callus tissues or intact tissues by enzymatic treatment with

Discuss Question

Answer: Option C. -> both cellulotyic and pectolytic enzymes

Question 23. Which of the following is used in the culture of regenerating protoplasts, single cells or very dilute cell suspensions?

Discuss Question

Answer: Option C. -> Both (a) and (b)

Question 24. Which method of plant propagation involves the use of girdling?

Discuss Question

Answer: Option C. -> Layering

Question 25. Organogenesis is

Discuss Question

Answer: Option B. -> formation of root and shoots on callus tissue

Question 26. In a callus culture

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

Discuss Question

Answer: Option A. -> increasing level of cytokinin to a callus induces shoot formation and increasing level of auxin promote root formation

Question 27. . Which breeding method uses a chemical to strip the cell wall of plant cells of two sexually incompatible species?