Tag: botany

Questions Related to botany

A transgenic food crop which may help solving the problem as night blindness in developing countries

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. Flavr Savr tomatoes

  2. Starlink maize

  3. Bt soybean

  4. Golden rice

Show answer
Correct Option: D
Explanation:

Night blindness is the inability to see normally in subdued light. It is usually a result of vitamin A deficiency. Golden rice is such a biofortified crop. Golden rice grains are easily recognisable by their yellow to orange colour. The stronger the colour the more carotene. Rice produces provitamin A (carotene) in the leaves but not in the grain, where the biosynthetic pathway is turned off during plant development. In golden rice, two genes have been inserted into the rice genome by genetic engineering, to restart the carotenoid biosynthetic pathway leading to the production and accumulation of carotene in the grains. Both genes are naturally involved in carotene biosynthesis. 

Therefore, the correct answer is option D.

The improved trait in golden rice is

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. High glysine content

  2. High protein content

  3. Insect resistance

  4. High vitamin A content

Show answer
Correct Option: D
Explanation:

Golden rice is a variety of rice (Oryza sativa) produced through genetic engineering to biosynthesize beta-carotene, a precursor of vitamin A, in the edible parts of rice. The research was conducted with the goal of producing a fortified food to be grown and consumed in areas with a shortage of dietary vitamin A, a deficiency which is estimated to kill 670,000 children under the age of 5 each year.
Golden rice differs from its parental strain by the addition of three beta-carotene biosynthesis genes. 

Golden rice is enriched in

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. Vit C

  2. Vit A

  3. Vit D

  4. All

Show answer
Correct Option: B
Explanation:

Golden rice is yellow coloured enriched with pro-vitamin A (by introducing the genes).

Transgenic plants are

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. Produced by a somatic embryo in an artificial medium.

  2. Generated by introducing foreign DNA into a cell and regenerating a plant form.

  3. Produced after protoplast fusion in an artificial medium.

  4. Grown in an artificial medium after hybridization in the field.

Show answer
Correct Option: B
Explanation:

A transgenic plant is a plant, with an insertion of DNA from another organism. This technology can be used as a tool for researchers to insert useful genes as a means of improving crops.

Thus, the correct answer is option B.

Golden rice is a promising transgenic crop. When released for cultivation, it will help in

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. Herbicide tolerance

  2. Producing a petrol-like fuel fro m rice

  3. Alleviation of vitamin A deficie ncy

  4. Pest resistance

Show answer
Correct Option: C

Which of the following is an improved variety of wheat crop?

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. Roja-64 A

  2. Sonalika

  3. Sonara-64

  4. All of these

Show answer
Correct Option: D
Explanation:
Roja-64 A, Sonalika, Sonara-64 all are improved variety of wheat crop.
So, the correct option is 'All of these'

Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin 'A' deficiency?

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. Falver Savr' tomato

  2. Canolla

  3. Golden rice

  4. Bt-Brinjal

Show answer
Correct Option: C
Explanation:

Golden rice is a variety of Oryza sativa rice produced through genetic to biosynthesize beta-carotene, a precursor of vitamin-A in the edible part of rice. The research that led to golden rice was conducted with the goal of helping children who suffer from vitamin A.

So, the correct option is 'Golden rice'.

Golden rice is rich in

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. vitamin B

  2. vitamin A

  3. both (a) and (b)

  4. none of these

Show answer
Correct Option: B
Explanation:

Golden rice is a variety of rice produced through genetic engineering to biosynthesize beta-carotene, a precursor of vitamin A, in the edible parts of rice.

So, the correct option is vitamin A.

Basic principle of developing transgenic plants and animals is to introduce the gene of interest into the nucleus to.

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. somatic cell

  2. vegetative cell

  3. germ cell

  4. body cell

Show answer
Correct Option: C
Explanation:

The principle of developing transgenic plants and animals is to introduce the gene of interest into the nucleus to germ cell.

So, the correct option is 'Germ cell'.

Which one of the following bacteria is used for production of transgenic plants?

botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

  1. Escherichia coli

  2. Bacillus thuringiensis

  3. Staphylococcus aureus

  4. Agrobacterium tumefaciens

Show answer
Correct Option: B
Explanation:

Bt corn varieties, for example, contain a gene from a bacterium found in the soil that causes the transgenic corn to produce an insecticidal protein.

So, the correct option is 'Bacillus thuringiensis'.