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Biotechnology and its Applications · Question 18

NEET (UG) 2022MCQEasy📈 Topic in 12% papers+4−1
1

In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:

  1. Retroviral vector is introduced into these lymphocytes.
  2. Gene isolated from marrow cells producing ADA is introduced into cells at embryonic stages
  3. Lymphocytes from patient's blood are grown in culture, outside the body
  4. Genetically engineered lymphocytes are not immortal cells.

Answer

(4) Genetically engineered lymphocytes are not immortal cells.

Solution

As per NCERT, in gene therapy of ADA deficiency, lymphocytes from the patient's blood are grown in culture, a functional ADA cDNA is introduced into them using a retroviral vector, and the cells are returned to the patient.

These genetically engineered lymphocytes are not immortal, they die after some time.

The patient requires periodic infusion of such lymphocytes.

(A permanent cure is possible only if the ADA gene is introduced into cells at early embryonic stages.)

Answer: (4)

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2

Statements related to human Insulin are given below. Which statements is/are correct about genetically engineered Insulin? Choose the most appropriate answer from the options given below :

  1. A, B and D only
  2. B only
  3. C and D only
  4. C, D and E only
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3

Milk of transgenic ‘Cow Rosie’ was nutritionally more balanced product for human babies than natural cow milk because it contained:

  1. Human enzyme Adenosine Deaminase (ADA)
  2. Human protein α-1-antitrypsin
  3. Human alpha-lactalbumin
  4. Human insulin-like growth factor
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4

When gene targeting involving gene amplification is attempted in an individual's tissue to treat disease, it is known as :

  1. Safety testing
  2. Biopiracy
  3. Gene therapy
  4. Molecular diagnosis
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5

Which of the following is not an application of PCR (Polymerase Chain Reaction)?

  1. Detection of gene mutation
  2. Molecular diagnosis
  3. Gene amplification
  4. Purification of isolated protein
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6

Now-a-days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise to its complementary DNA in a clone of cells, followed by its detection using autoradiography because:

  1. mutated gene does not appear on photographic film as the probe has complementarity with it
  2. mutated gene partially appears on a photographic film
  3. mutated gene completely and clearly appears on a photographic film
  4. mutated gene does not appear on a photographic film as the probe has no complementarity with it
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7

With regard to insulin choose correct options. Choose the correct answer from the options given below.

  1. A and D only
  2. B and D only
  3. B and C only
  4. A, C and D only
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8

For effective treatment of the disease, early diagnosis and understanding its pathophysiology is very important. Which of the following molecular diagnostic techniques is very useful for early detection?

  1. Hybridization Technique
  2. Western Blotting Technique
  3. Southern Blotting Technique
  4. ELISA Technique
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9

The Adenosine deaminase deficiency results into

  1. Addison's disease
  2. Dysfunction of immune system
  3. Parkinson's disease
  4. Digestive disorder
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10

Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to

  1. Insect predators
  2. Insect pests
  3. Fungal diseases
  4. Plant nematodes
NEET (UG) 2020
11

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.
NEET (UG) 2020

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