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Biotechnology and its Applications · Question 28

NEET (UG) 2020MCQEasy📈 Topic in 38% papers+4−1
1

Which of the following statements is not correct?

  1. In man insulin is synthesised as a proinsulin
  2. The proinsulin has an extra peptide called C-peptide.
  3. Genetically engineered insulin is produced in E. coli.
  4. The functional insulin has A and B chains linked together by hydrogen bonds.

Answer

(4) The functional insulin has A and B chains linked together by hydrogen bonds.

Solution

As per NCERT, insulin consists of two short polypeptide chains, chain A and chain B, that are linked together by disulphide bridges (not hydrogen bonds).

In man, insulin is synthesised as a pro-hormone (proinsulin) which contains an extra stretch called the C-peptide; it is removed during maturation.

Eli Lilly introduced the DNA sequences of chains A and B into plasmids of E. coli to produce insulin chains.

∴ Statement (4) is not correct.

Answer: (4)

NEET (UG) 2020

Keep practising — Biotechnology and its Applications

2

Match the following columns and select the correct option.

  1. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
  2. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
  3. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  4. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
NEET (UG) 2020
3

What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?

  1. Acidic pH of stomach
  2. Body temperature
  3. Alkaline pH of gut
  4. Moist surface of midgut
NEET (UG) 2019
4

Which of the following is true for Golden rice?

  1. It is drought tolerant, developed using Agrobacterium vector.
  2. It has yellow grains, because of a gene introduced from a primitive variety of rice.
  3. It is Vitamin A enriched, with a gene from daffodil.
  4. It is pest resistant, with a gene from Bacillus thuringiensis.
Out of syllabusNEET (UG) 2019
5

Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?

  1. Retrovirus
  2. Ti plasmid
  3. phage
  4. pBR322
NEET 2018
6

In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is

  1. Indian Council of Medical Research (ICMR)
  2. Council for Scientific and Industrial Research (CSIR)
  3. Research Committee on Genetic Manipulation (RCGM)
  4. Genetic Engineering Appraisal Committee (GEAC)
NEET 2018
7

A 'new' variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to

  1. Co-667
  2. Sharbati Sonora
  3. Lerma Rojo
  4. Basmati
NEET 2018
8

Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called

  1. bio-infringement
  2. biodegradation
  3. biopiracy
  4. bioexploitation
NEET 2018
9

The two polypeptides of human insulin are linked together by

  1. Hydrogen bonds
  2. Covalent bond
  3. Disulphide bridges
  4. Phosphodiester bond
NEET 2016 (Phase 1)
10

Which part of the tobacco plant is infected by Meloidogyne incognita ?

  1. Flower
  2. Stem
  3. Leaf
  4. Root
NEET 2016 (Phase 1)
11

Which kind of therapy was given in 1990 to a four-year-old girl with adenosine deaminase [ADA] deficiency ?

  1. Radiation therapy
  2. Immunotherapy
  3. Gene therapy
  4. Chemotherapy
NEET 2016 (Phase 2)

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