Which Part of the Plant is Best Suited for Making Virus-free Plants and Why - Biology


Which part of the plant is best suited for making virus-free plants and why?


Solution 1

Apical and axillary meristems of plants is used for making virus-free plants. In a diseased plant, only this region is not infected by the virus as compared to the rest of the plant region. Hence, the scientists remove axillary and apical meristems of the diseased plant and grow it in vitro to obtain a disease-free and healthy plant.

Virus-free plants of banana, sugarcane, and potato have been obtained using this method by scientists.

Solution 2

The apical or axillary meristems are best suited for making virus free plants because they are generally free from virus.

Concept: Tissue Culture
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Chapter 9: Strategies for Enhancement in Food Production - Exercises [Page 178]


NCERT Biology Class 12
Chapter 9 Strategies for Enhancement in Food Production
Exercises | Q 9 | Page 178

Video TutorialsVIEW ALL [1]


What is 'tissue culture'?

Describe the methodology of tissue culture.

How are somatic hybrids obtained?

With advancements in genetics, molecular biology and tissue culture, new traits have been incorporated into crop plants. Explain the main steps in breeding a new genetic variety of a crop

Find out what the various components of the medium used for propagation of explants in vitro are?

Explain micropropagation and somatic hybridization.

Mention one significant difference between Parenchyma and Sclerenchyma.

Mention one significant difference between Symplastic movement and apoplastic movement

In the following questions/statements has four suggested answers. Rewrite the correct answer

Roots and shoots lengthen through the activity of:

(A) Apical meristem

(B) Vascular Cambium

(C) Lateral meristem

(D) Cork Cambium

Give three anatomical differences between a monocot root and a dicot root

Why are xylem and phloem classified as complex tissues?

Describe the structure of phloem.

Describe different steps involved in tissue culture technique

Give one significant contribution of the given scientists:

P. Maheshwari

Describe the tissue culture technique in plants

You have obtained a high yielding variety of tomato. Name and explain the procedure that ensures retention of the desired characteristics repeatedly in large populations of future generations of the tomato crop.

How can healthy potato plants be obtained from a desired potato variety which is viral infected? Explain.



Define the term tissue.

Attempt any TWO of the following:

Enlist the applications of tissue culture.

Describe any ‘two’ applications of tissue culture technique.

Answer the following question:

What is a clone?

Give one significant difference between :


In plant tissue culture auxin is used for ____________.

From the following statements which is NOT correct?

Identify labels P, Q, R in the given figure of root showing different regions.

The large number of genetically identical offsprings produced by micropropogation are called ____________.

To get a disease-free plant from a virus infected plant, which one of the following can be used as an explant in tissue culture?

Which of the following helps bamboo and grasses to elongate?

Removal of ring wood of tissue outside the vascular cambium from the tree trunk kills it because ______.

Which of the following method is NOT used for crop improvement?

Callus is ______. 

Method of production of thousand of plant through tissue culture is ______.

The term ‘totipotency’ refers to the capacity of a ______.

Given below are a few statements regarding somatic hybridization. Choose the correct statements.

  1. protoplasts of different cells of the same plant are fused
  2. protoplasts from cells of different species can be fused
  3. treatment of cells with cellulase and pectinase is mandatory
  4. the hybrid protoplast contains characters of only one parental protoplast

Why are plants obtained by protoplast culture called somatic hybrids?

What is protoplast fusion?

Plants raised through tissue cultures are clones of the ‘parent’ plant. Discuss the utility of these plants.

What are the physical barriers of a cell in the protoplast fusion experiment? How are the barriers overcome?

The pH of nutrient medium for plant tissue culture is in the range of ______.

Explain the concept of tissue culture.

Write a short note on suspension culture.

Give importance of coconut milk in tissue culture.

What does the plant tissue culture medium consists of?


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