Biology

Plant Propagation Techniques

591 Questions

Plant propagation techniques cover both natural and artificial methods of cultivating plants, including micropropagation, tissue culture, and layering. These botanical concepts evaluate how desirable characteristics are multiplied and transferred into new plants. Questions on this topic routinely feature in the biology segment of various state and central competitive exams.

Micropropagation methodsArtificial vegetative propagationPlant tissue cultureLayering techniquesMeristem differentiation

Plant Propagation Techniques Questions

Multiple choice

Horticulture includes the

  1. Rearing of fishes

  2. Rearing of honey bees

  3. Plant propagation and plant breeding

  4. Rearing of milk animals
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Horticulture specifically involves plant propagation and plant breeding for garden crops, fruits, vegetables, and ornamental plants. The other options refer to animal husbandry practices - fish farming (pisciculture), beekeeping (apiculture), and dairy farming.

Multiple choice

Clones can be obtained by:

  1. tissue culture, micro-propagation and asexual reproduction

  2. tissue culture, micro-propagation and somatic hybridization

  3. transplantation, micro-propagation and somatic hybridization

  4. recombinant DNA technology, tissue culture and somatic hybridization

  5. recombinant DNA technology, asexual reproduction and transplantation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Clones can be obtained by all the three methods.

Multiple choice

Which of the following statements about vegetative propagation is incorrect?

  1. It can occur more rapidly than seed propagation.

  2. Plants that produce lots of flowers and seeds are the ones that choose vegetative propagation.

  3. It allows a genetically superior plant to produce unlimited copies of itself without variation.

  4. Bulbs of onions are also a method of vegetative propagation.

  5. Layering and grafting are means of artificial vegetative propagation.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Since flowers and seeds are related to sexual propagation, plants that rarely produce flowers or seeds like potato choose vegetative propagation.

Multiple choice

Seedless water melons are obtained by

  1. triploidy

  2. gibberellin application

  3. haploidy

  4. vegetative propagation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gibberellin induces parthenocarpy, i.e. develop seedless fruits from unfertilized pistils.

Multiple choice

If the goal were to create a plant resistant to an insecticide, which cell-based plant technology would be most effective?

  1. Clonal propagation

  2. Cybridization

  3. Protoplast fusion

  4. Mutant selection
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mutant selection involves growing plant cell cultures in vitro and screening for mutants with desired traits (like insecticide resistance). Selected mutant cells can then be regenerated into whole plants. Clonal propagation produces genetically identical copies. Cybridization combines cytoplasm from one species with nucleus of another. Protoplast fusion combines whole genomes.

Multiple choice

Which of the following is the correct sequence of procedures for interspecific somatic hybridization in plants?

  1. Procuring haploid cells from the parental species à isolation of protoplast by removing the cellulose wall à protoplast fusion à regeneration of fused cell

  2. Isolation of somatic cells à extraction of protoplast à protoplast fusion à cutting of the fused cell

  3. Isolation of haploid and somatic cells à extraction of cells

  4. Enzymatic isolation of haploid cellà isolation of protoplast fusion of extracted protoplasts à regeneration of the fused cell
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Interspecific somatic hybridization requires: (1) obtaining haploid cells from parental species, (2) removing cellulose walls to isolate protoplasts using enzymes like cellulase and pectinase, (3) fusing protoplasts using PEG or electrofusion, and (4) regenerating the fused hybrid cells into plants through tissue culture. Option A correctly sequences these steps.

Multiple choice

Sansevieria is an example of

  1. cuttings

  2. layering

  3. air layering

  4. mound layering

  5. grafting
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is a small piece of plant organ.