What term is used for the naked plant cells (surrounded only by plasma membranes) obtained after digesting their cell walls?
Scientists have isolated single cells from plants and, after digesting their cell walls, have been able to isolate naked protoplasts (surrounded by plasma membranes).
Question 72 of 494
📘 CLASS XII
Which type of transgenic animals are most common, accounting for over 95 per cent of all existing transgenic animals?
While transgenic rats, rabbits, pigs, sheep, cows and fish have been produced, over 95 per cent of all existing transgenic animals are mice.
Question 73 of 494
📘 CLASS XII
Transgenic animals are created to serve as models for human diseases. For which neurological disease does an existing transgenic model help increase understanding?
Transgenic models exist for many human diseases such as cancer, cystic fibrosis, rheumatoid arthritis and Alzheimer’s.
Question 74 of 494
📘 CLASS XII
What benefit is provided by the human alpha-lactalbumin contained in the milk of the transgenic cow Rosie?
The milk produced by Rosie contained the human alpha-lactalbumin and was nutritionally a more balanced product for human babies than natural cow-milk.
Question 75 of 494
📘 CLASS XII
In chemical safety testing using transgenic animals, the goal is to obtain results in less time. This is achieved by making the animals:
Transgenic animals are made to carry genes which make them more sensitive to toxic substances than non-transgenic animals, allowing for results in less time.
Question 76 of 494
📘 CLASS XII
The Indian Parliament recently cleared the second amendment of the Indian Patents Bill primarily to address issues related to:
The Indian Parliament cleared the second amendment of the Indian Patents Bill to take issues of patent terms, emergency provisions, research and development initiatives, and unauthorized exploitation of bio-resources into consideration.
Question 77 of 494
📘 CLASS XII
Which of the following conditions might lead to the initiation of RNA interference (RNAi) through the source of complementary RNA?
The source of the complementary dsRNA that initiates RNAi could be from an infection by viruses having RNA genomes or mobile genetic elements (transposons) that replicate via an RNA intermediate.
Question 78 of 494
📘 CLASS XII
In the context of the nematode Meloidegyne incognitia infestation, the dsRNA in the host plant acts to silence the parasite's specific:
RNAi involves the silencing of a specific mRNA due to a complementary dsRNA molecule that binds to and prevents translation of the mRNA (silencing). This was used against the nematode Meloidegyne incognitia.
Question 79 of 494
📘 CLASS XII
What advantage do genetically modified crops provide concerning mineral usage?
Genetic modification has increased the efficiency of mineral usage by plants, which prevents the early exhaustion of the fertility of the soil.
Question 80 of 494
📘 CLASS XII
The term "Biopiracy" refers to the unauthorized use of bio-resources without which two conditions being met?
Biopiracy refers to the use of bio-resources by multinational companies and other organisations without proper authorisation from the countries and people concerned without compensatory payment.
