What is the common term for the plants resulting from micro-propagation, as they are genetically identical to the original plant?
The method of producing thousands of plants through tissue culture is called micro-propagation. Each resulting plant is genetically identical to the original plant and is called a somaclone.
Question 62 of 494
📘 CLASS XII
The use of agrochemicals like fertilizers and pesticides helped the Green Revolution succeed, but for farmers in the developing world, a major drawback was that these chemicals were often:
Increased yields during the Green Revolution were partly due to the use of agrochemicals (fertilisers and pesticides). However, agrochemicals are often too expensive for farmers in the developing world.
Question 63 of 494
📘 CLASS XII
Which of the following conditions is an abiotic stress that Genetically Modified (GM) crops have been made more tolerant to?
Genetic modification has made crops more tolerant to abiotic stresses such as cold, drought, salt, and heat.
Question 64 of 494
📘 CLASS XII
What is the primary function of the C peptide in insulin synthesis in mammals, including humans?
Insulin is synthesized as a pro-hormone, which contains an extra stretch called the C peptide. This C peptide is not present in the mature insulin and is removed during maturation.
Question 65 of 494
📘 CLASS XII
Before the advent of genetically engineered insulin, where was the insulin used for diabetic patients extracted from?
Insulin used for diabetes was earlier extracted from the pancreas of slaughtered cattle and pigs.
Question 66 of 494
📘 CLASS XII
Which of the following is a drawback associated with insulin isolated from animal sources for human use?
Insulin from an animal source caused some patients to develop allergy or other types of reactions to the foreign protein.
Question 67 of 494
📘 CLASS XII
Why is it necessary for a person undergoing gene therapy for ADA deficiency to receive periodic infusions of genetically engineered lymphocytes?
Lymphocytes engineered with functional ADA cDNA are returned to the patient, but since these cells are not immortal, the patient requires periodic infusion of such genetically engineered lymphocytes.
Question 68 of 494
📘 CLASS XII
Adenosine Deaminase (ADA) deficiency is caused by the deletion of the gene for this enzyme, which is crucial for the function of the:
The first clinical gene therapy was given for ADA deficiency. This enzyme is crucial for the immune system to function.
Question 69 of 494
📘 CLASS XII
In the context of agriculture, which of the following is NOT one of the three options listed for increasing food production?
The three options for increasing food production are: (i) agro-chemical based agriculture; (ii) organic agriculture; and (iii) genetically engineered crop-based agriculture. Conventional breeding failed to keep pace with demand.
Question 70 of 494
📘 CLASS XII
In the production of the hybrid plant "Pomato" via somatic hybridisation, the protoplasts fused were from which two plants?
Somatic hybridisation has been achieved by fusing protoplasts of tomato and potato to form new hybrid plants, resulting in the formation of pomato.
