Questions and answers for exam Preparation

MCQs

Total Questions : 159 | Page 6 of 16 pages

Question 51. 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
Answer: (a).increasing level of cytokinin to a callus induces shoot formation and increasing level of auxin promote root formation

Question 52. Which of the following is used in the culture of regenerating protoplasts, single cells or very dilute cell suspensions?

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

Discuss Question

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

Question 53. Which breeding method uses a chemical to strip the cell wall of plant cells of two sexually incompatible species?

Mass selection
Protoplast fusion
Transformation
Transpiration

Discuss Question

Answer: Option B. -> Protoplast fusion
Answer: (b).Protoplast fusion

Question 54. Which of the following is considered as the disadvantage of conventional plant tissue culture for clonal propagation?

Multiplication of sexually derived sterile hybrids
Less multiplication of disease free plants
Storage and transportation of propogates
Both (b) and (c)

Discuss Question

Answer: Option C. -> Storage and transportation of propogates
Answer: (c).Storage and transportation of propogates

Question 55. Which is/are the naturally occurring plant auxins?

Indole acetic acid (IAA)
Naphthalenacetic acid (NAA)
2,4-dichlorophenoxyacetic acid
All of the above

Discuss Question

Answer: Option A. -> Indole acetic acid (IAA)
Answer: (a).Indole acetic acid (IAA)

Question 56. Which method of plant propagation involves the use of girdling?

Grafting
Cuttings
Layering
Micropropagation

Discuss Question

Answer: Option C. -> Layering
Answer: (c).Layering

Question 57. Which is/are the disadvantage/(s) of using IAA in plant cell culture media?

It is unstable in solution
Gets easily oxidized
Conjugated to inactive form by plant cells
All of the above

Discuss Question

Answer: Option D. -> All of the above
Answer: (d).All of the above

Question 58. 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
Answer: (a).Maintenance alive of a whole organ, after removal from the organism by partial immersion in a nutrient fluid

Question 59. What is 'nurse' or conditioned medium?

It is the media full of growth factors used for the growth of cells
It is the medium added to nurse the callus culture
Both (a) and (b)
It is the liquid medium removed from the suspension of fast growing cells

Discuss Question

Answer: Option D. -> It is the liquid medium removed from the suspension of fast growing cells
Answer: (d).It is the liquid medium removed from the suspension of fast growing cells

Question 60. Which is the most common carbon source used in the plant cell culture media?