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Biology
Biotechnology and its Applications
86 questions from 37 papers, each with its answer.
- 86 questions
- 37 papers
- 2.44% of Biology
Mechanism of Action of Bt Toxin
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Given below are two statements: Statement I: Bt toxins are insect group specific and coded by a gene $cry$ IAc. Statement II: Bt toxin exists as inactive protoxin in $B.\ thuringiensis$. However, after ingestion by the insect the inactive protoxin gets converted into active form due to acidic pH of the insect gut. In the light of the above statements, choose the correct answer from the options given below:Statement I: Bt toxins are insect-group specific and are coded by $cry$ genes, e.g. $cry$IAc – true. Statement II: Bt toxin exists as an inactive protoxin in $B.\ thuringiensis$; after ingestion, it is converted into the active form due to the alkaline pH of the insect gut, not acidic – false. So Statement I is true but Statement II is false.
Bt Toxins and Gene Therapy Applications
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Match List I with List II regarding biotechnology applications in agriculture and medicine.
Pick the matching item from Column II for each row.
Column I
- A. $\alpha_1$-antitrypsin
- B. $Cry$ IAb
- C. $Cry$ IAc
- D. Enzyme replacement therapy
Column II
- I. Cotton bollworm
- II. ADA deficiency
- III. Emphysema
- IV. Corn borer
Correct answer: A → III, B → IV, C → I, D → II
$\alpha$-1 antitrypsin (human protein) – used to treat emphysema $cry$ IAb – controls corn borer $cry$ IAc – controls cotton bollworm Enzyme replacement therapy – a treatment option for ADA deficiency Correct match: A-III, B-IV, C-I, D-II.
That is every question in Biotechnology and its Applications for this filter.
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