Biotechnology and Its Applications NDA Questions

NDA BIOLOGY

Biotechnology and Its Applications MCQ Questions


13.
Interferons are proteins that:
A.
Protect cells from viral infection
B.
Inhibit cell division in cancer
C.
Destroy bacterial cell walls
D.
Suppress autoimmune reactions
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ANSWER :
A. Protect cells from viral infection
14.
Gene therapy involves:
A.
Insertion of a functional gene into target cells to correct a genetic disorder
B.
Editing genes in germ cells only
C.
Blocking gene expression by drugs
D.
Chemical treatment of defective proteins
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ANSWER :
A. Insertion of a functional gene into target cells to correct a genetic disorder
15.
ADA (Adenosine Deaminase) deficiency causes:
A.
Cystic fibrosis
B.
Sickle cell anaemia
C.
Severe Combined Immunodeficiency (SCID)
D.
Down's syndrome
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ANSWER :
C. Severe Combined Immunodeficiency (SCID)
16.
Molecular diagnostics uses which technique to detect very small amounts of pathogen DNA?
A.
ELISA
B.
Radioimmunoassay
C.
PCR (Polymerase Chain Reaction)
D.
Western Blotting
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ANSWER :
C. PCR (Polymerase Chain Reaction)
17.
ELISA (Enzyme-Linked Immunosorbent Assay) is used to detect:
A.
Chromosome abnormalities
B.
DNA mutations
C.
Enzyme activity in cells
D.
Antigens or antibodies in a sample
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ANSWER :
D. Antigens or antibodies in a sample
18.
Monoclonal antibodies are produced by:
A.
Hybridoma cells (fusion of B cells and myeloma cells)
B.
Genetically modified E. coli
C.
Recombinant yeast cells
D.
T lymphocytes stimulated by antigens
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ANSWER :
A. Hybridoma cells (fusion of B cells and myeloma cells)