Advertisements
Advertisements
Question
Golden rice is ______.
Options
A variety of rice grown along to yellow rives of china
Long stored rice having yellow colour tint
A transgenic rice having gene for B-carotene
Wide variety of rice with yellow coloured grains
Solution
Golden rice is a transgenic rice having gene for B-carotene.
Explanation:
Golden rice is a crop that has been genetically modified to have a higher nutritional value. It is high in vitamin A and contains the '13 carotene' gene from the daffodil plant as well as a gene from some bacteria. Golden rice protects juvenile blindness caused by vitamin A deficiency.
APPEARS IN
RELATED QUESTIONS
What is mycoherbicide?
How did the process of RNA interference help to control the nematode from infecting the roots of tobacco plants?
Answer the following question.
How is a continuous culture system maintained in bioreactors and why?
Answer the following question.
List any four ways by which GMOs have been useful for enhanced crop output.
Answer the following question.
List any four ways by which GMOs have been useful for enhanced crop output.
Bt brinjal is an example of transgenic crops. In this Btrefers to ______.
Silencing of a gene could be achieved through tee use ______.
Insects in the Lepidopteran group lay eggs on maize crops. The larvae on hatching feed on maize leaf and tender cob. In order to arrest the spread of three such Lepidopteran pests, Bt maize crops were introduced in an experimental field.
A study was carried out to see which of the three species of lepidopteran pests was most susceptible to Bt genes and its product.
The lepidopteran pests were allowed to feed on the same Bt-maize crops grown on 5 fields (A-E).
The graph below shows the leaf area damaged by these three pests after feeding on maize leaves for five days.
Key for lepidopteran insect pest species
![]() |
Species I |
![]() |
Species II |
![]() |
Species III |
Insect gut pH was recorded as 10, 8 and 6 respectively for Species I, II and III respectively.
(a) Evaluate the efficacy of the Bt crop on the feeding habits of the three species of stem borer and suggest which species is least susceptible to Bt toxin.
(b) Which species is most susceptible to Bt-maize, and explain why?
(c) Using the given information, suggest why a similar effect was not seen in the three insect species.
State any two benefits of Genetically modified crops.
Compare and contrast the disadvantages of production of genetically modified crops.