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  4. Biotechnology and its Applications Chapter-Wise Test 3

Biotechnology and its Applications Chapter-Wise Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is an example of somatic hybridization?

Golden rice
Bt cotton
Pomato
Hybrid maize
3

Pomato is produced by fusing protoplasts of tomato and potato through somatic hybridization.

Which of the following is incorrect about cry proteins used in Bt crops?

Cry proteins are toxic to specific insect pests.
Cry proteins are produced by Bacillus thuringiensis.
Cry proteins are produced by all plants naturally.
Cry proteins disrupt the gut of insect larvae.
3

Cry proteins are not produced by all plants naturally; they are produced by Bacillus thuringiensis and introduced into crops through genetic engineering.

Which technology allows the production of identical genetic copies of organisms?

Tissue culture
Gene editing
Cloning
Hybridization
3

Cloning is the process of producing identical genetic copies of organisms or cells.

Which of the following is correct about tissue culture in plants?

Tissue culture is used only for plant hybridization.
Tissue culture produces genetically identical plants.
Tissue culture prevents plant growth.
Tissue culture is only applicable to medicinal plants.
2

Tissue culture is a technique used to produce genetically identical plants through micropropagation from a single cell or tissue.

Which enzyme is used to synthesize DNA from an RNA template?

DNA polymerase
Reverse transcriptase
Ligase
Endonuclease
2

Reverse transcriptase synthesizes complementary DNA (cDNA) from an RNA template.

Which phase of bacterial growth produces Bt toxin crystals?

Lag phase
Log phase
Stationary phase
Decline phase
3

Bt toxin crystals are produced during the stationary phase of bacterial growth.

Which genetic disorder is treated using gene therapy with the ADA gene?

Sickle cell anemia
Cystic fibrosis
Adenosine deaminase deficiency
Thalassemia
3

Gene therapy is used to treat adenosine deaminase deficiency by introducing the ADA gene into the patient's cells.

What is the primary concern related to biopiracy?

Loss of biodiversity
Unauthorized exploitation of bio-resources
Decreased crop yields
Overuse of fertilizers
2

Biopiracy involves the unauthorized use of biological resources without compensating the source countries or communities.

Which of the following is incorrect about molecular diagnostics?

Molecular diagnostics uses techniques like PCR to detect pathogens.
Molecular diagnostics identifies genetic mutations.
Molecular diagnostics relies solely on visual inspection.
Molecular diagnostics helps in disease management.
3

Molecular diagnostics uses techniques like PCR and DNA probes for accurate detection, not just visual inspection.

Which of the following is incorrect about gene therapy?

Gene therapy replaces defective genes with functional ones.
Gene therapy is used to treat genetic disorders.
Gene therapy is performed at the protein level.
Gene therapy uses vectors for gene delivery.
3

Gene therapy is performed at the genetic (DNA) level, not at the protein level.

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