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Biotechnology and its Applications MCQs
Class XII Biology
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NCERT Based
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NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
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494 questions in this chapter
Question 231 of 494
📘 CLASS XII
The Bt toxin protein is converted into its active form because the alkaline pH of the insect gut ________ the crystals.
The alkaline pH of the gut solubilizes the crystals, converting the protoxin into the active form.
Question 232 of 494
📘 CLASS XII
The nematode-specific genes used for RNAi protection in tobacco plants were introduced using ________ vectors.
Nematode-specific genes were introduced using Agrobacterium vectors.
Question 233 of 494
📘 CLASS XII
The problem with insulin isolated from animals was the risk of developing allergy or other types of ________ to the foreign protein.
Animal insulin caused some patients to develop allergy or other types of reactions to the foreign protein.
Question 234 of 494
📘 CLASS XII
In humans, the insulin pro-hormone contains an extra stretch known as the C peptide which is removed during the process of ________.
The C peptide is removed during maturation into functional insulin.
Question 235 of 494
📘 CLASS XII
Gene therapy involves correction of a gene defect that has been diagnosed in a child or ________.
Gene therapy is used to correct defects diagnosed in a child or embryo.
Question 236 of 494
📘 CLASS XII
The deletion of the gene for ADA leads to deficiency of the enzyme, which impairs the function of the ________ system.
ADA is crucial for the immune system.
Question 237 of 494
📘 CLASS XII
One method of treatment for ADA deficiency is bone marrow ________.
ADA deficiency can be cured by bone marrow transplantation.
Question 238 of 494
📘 CLASS XII
The genetically engineered lymphocytes infused into an ADA patient are cultured ________ the body before reintroduction.
Lymphocytes are grown in a culture outside the body.
Question 239 of 494
📘 CLASS XII
Recombinant DNA technology, PCR, and ELISA are techniques that serve the purpose of ________ diagnosis.
These techniques are used for early diagnosis, unlike conventional methods.
Question 240 of 494
📘 CLASS XII
PCR detects pathogens by ________ of their nucleic acid, even when their concentration is very low.
PCR detects low concentrations of pathogens by amplification of their nucleic acid.
