Biotechnology and its Applications Chapter-Wise Test 17

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is incorrect about Bt toxin?

Bt toxin is produced by Bacillus thuringiensis.
Bt toxin provides resistance against insect pests in crops.
Bt toxin affects all organisms equally.
Bt toxin is introduced into crops through genetic engineering.
3

Bt toxin is specific to certain insect pests and does not affect all organisms equally.

Which vector is used in recombinant DNA technology to produce human insulin in E. coli?

Plasmid
Cosmid
Retrovirus
Phage
1

Plasmids are used as vectors in recombinant DNA technology to produce human insulin in E. coli.

Which recombinant product is used to treat diabetes?

Recombinant insulin
Interferon
Growth hormone
Erythropoietin
1

Recombinant insulin produced through genetic engineering is used to treat diabetes.

Which of the following statements is correct about transgenic animals?

Transgenic animals contain foreign genes introduced through genetic engineering.
Transgenic animals are produced by traditional breeding methods.
Transgenic animals have identical DNA sequences to their parent organisms.
Transgenic animals are only used for increasing milk production.
1

Transgenic animals are genetically modified to contain foreign genes introduced through genetic engineering techniques.

Which plant tissue is used in culture to produce virus-free plants?

Root tissue
Meristem
Leaf tissue
Stem tissue
2

Meristem tissue is used in culture to produce virus-free plants as it is usually not infected by viruses.

What is the role of cry genes in Bt crops?

Enhance nitrogen fixation
Provide resistance against insects
Increase seed dormancy
Promote hybridization
2

The cry genes encode for proteins toxic to insect pests, providing resistance.

Which of the following is incorrect about molecular diagnostics?

Molecular diagnostics uses PCR for detecting pathogens.
Molecular diagnostics is used to identify genetic mutations.
Molecular diagnostics relies solely on microscopic observations.
Molecular diagnostics helps in early disease detection.
3

Molecular diagnostics uses advanced techniques like PCR and DNA probes, not just microscopic observations, for accurate detection of diseases and genetic mutations.

Which of the following statements is correct about gene therapy?

Gene therapy is used to introduce defective genes into cells.
Gene therapy is used to replace defective genes with functional ones.
Gene therapy prevents gene expression permanently.
Gene therapy is unrelated to genetic disorders.
2

Gene therapy is used to replace defective genes with functional ones to treat genetic disorders.

Which method is used to detect the presence of a pathogen using antigen-antibody interactions?

PCR
Northern blotting
ELISA
Southern blotting
3

ELISA (Enzyme-Linked Immunosorbent Assay) detects pathogens through antigen-antibody interactions.

Which of the following is correct about gene cloning?

Gene cloning is used to delete genes from the host genome.
Gene cloning produces multiple identical copies of a gene.
Gene cloning prevents DNA replication in host cells.
Gene cloning is unrelated to genetic engineering.
2

Gene cloning is a technique used to produce multiple identical copies of a gene for research, medicine, and agriculture.

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