Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Cellular totipotency is demonstrated by

  1. Only gymnosperm cells

  2. All plant cells

  3. All eukaryotic cells

  4. Only bacterial cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Totipotency is the ability of a single cell to divide and produce all of the differentiated cells in an organism. Many somatic plant cells, including some fully differentiated types (e.g., leaf mesophyll), provided they contain intact nuclear, plastid and mitochondrial genomes, have the capacity to regenerate into whole plants. This phenomenon is totipotency.

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Explant is

  1. Plant collected after harvesting

  2. Exploited part of a plant

  3. Small part of the plant meant for tissue culture

  4. Uprooted for transplantation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Explant culture is a technique used for the isolation of cells from a piece or pieces of tissue. Tissue harvested in this manner is called as an explant. It can be a portion of the shoot, leaves or some cells from a plant or can be any part of the tissue from an animal or from umblical cord tissue. So, explant is small part of the plant meant for tissue culture and not uprooted for transplantation, plant, collected after harvesting or exploited part of a plant

So, the correct answer is 'Small part of the plant meant for tissue culture'

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Micropropagation is

  1. Germination of seed with cotyledons above the soil

  2. A technique to obtain new plants by cultivating the cells or tissues in culture medium

  3. The mature stage of endosperm

  4. To manufacture sperm
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Micropropagation is the method of large production of plantlets in a less time. In this method, a small piece of plant tissue (explant) is cultured in a sterile medium which later develops into new plantlets. The offsprings produced by this methods are the exact copy of their parent plant. 

Thus, the correct answer is option B. 

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Cloning is obtained through

  1. Hybridisation

  2. Cross-pollination

  3. Self-pollination

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

Micropropagation is the method of large production of plantlets in a less time. In this method, a small piece of plant tissue (explant) is cultured in a sterile medium which later develops into new plantlets. The offsprings produced by this methods are the exact copy of their parent plant and are known as somaclones. So, the technique of micropropagation is also known as cloning.

Thus, the correct answer is option D. 

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

What is micropropagation?  

  1. Germination of seed with cotyledons above the soil.

  2. A technique to obtain new plants by cultivating the cells or tissues in culture medium.

  3. The mature stage of endosperm.

  4. To manufacture hormones.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Micropropagation is a technique to obtain new plants by cultivating the cell or tissue in culture medium through tissue culture.

So, the correct answer is 'A technique to obtain new plants by cultivating the cells or tissues in culture medium'

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Most plant tissue cultures are initiated from

  1. Callus

  2. Explants

  3. Plantlets

  4. Protoplasts

  5. Anthers
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The tissue obtained from a plant to be cultured is called an explant. Explants can be taken from different many parts of a plant, including portions of shoots, leaves, stems, flowers, roots, single undifferentiated cells and from many types of mature cells provided are they still contain living cytoplasm and nuclei and are able de-differentiate and resume cell division. This has given rise to the concept of totipotentency of plant cells. So, the correct answer is 'Explants'.

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Callus culture is useful for purposes like

  1. It helps in the production of secondary plant products.

  2. It is useful for the synthesis of starting compounds that are subsequently modified to yield the desired product.

  3. It is the starting materials for vegetative propagation of plants.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Callus culture is useful for many purposes:
1  Callus is the starting material for the suspension culture which cells are separated.
2. It helps in the production of secondary plant products.
3. It is useful for the synthesis of starting compounds that are subsequently modified to yield the desired product.
4. It is the starting materials for vegetative propagation of plants.
Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

In plant tissue culture, undifferentiated tissue is referred to as

  1. Callus

  2. Bark

  3. Xylem

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In plant tissue culture, undifferentiated tissue is referred to as callus, although a callus can contain meristematic nodules that may not be obvious to the naked eye but which never develop further unless suitable conditions are supplied.

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Reproducing plants by cells instead of seeds is called as

  1. Tissue culture

  2. Amphimixis

  3. Mutation

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tissue culture is a process that involves exposing plant tissue to a specific regimen of nutrients, hormones, and light under sterile, in vitro conditions to produce many new plants, each a clone of the original mother plant, over a very short period of time. The term plant tissue culture (micro propagation) is generally used for the aseptic culture of cells, tissues, organs and their components under defined chemical and physical conditions in vitro.