The strategy of RNA interference leads to the ________ of a specific mRNA.

[Biotechnology-and-its-Applications] [class-xii ]

• replication
• silencing
• amplification
• activation
Correct Option: B  [ silencing ]

Remark: RNAi involves silencing of a specific mRNA.

The two RNA molecules produced in the host plant (sense and anti-sense) form a ________ that initiates RNAi.

[Biotechnology-and-its-Applications] [class-xii ]

• ssRNA
• dsRNA
• mRNA
• tRNA
Correct Option: B  [ dsRNA ]

Remark: The complementary RNAs form a double stranded (dsRNA) that initiated RNAi.

Recombinant therapeutics are considered safer because they are free from the risk of infection, unlike products isolated from ________ sources.

[Biotechnology-and-its-Applications] [class-xii ]

• human
• non-human
• bacterial
• plant
Correct Option: B  [ non-human ]

Remark: Recombinant therapeutics are safer than products isolated from non-human sources.

One of the therapeutic applications of biotechnology is in the area of ________.

[Biotechnology-and-its-Applications] [class-xii ]

• diagnostics
• waste treatment
• therapeutics
• processed food
Correct Option: C  [ therapeutics ]

Remark: The applications of biotechnology include therapeutics, diagnostics, modified crops, etc..

The gene coding for the Bt toxin in Bacillus thuringiensis is often designated as a ________ gene.

[Biotechnology-and-its-Applications] [class-xii ]

• plasmid
• cry
• pesticide
• vegetative
Correct Option: B  [ cry ]

Remark: The toxin is coded by a gene named cry.

Gene therapy corrects a gene defect by inserting genes into a person’s cells and ________ to treat a disease.

[Biotechnology-and-its-Applications] [class-xii ]

• organs
• tissues
• lymph
• bones
Correct Option: B  [ tissues ]

Remark: Genes are inserted into a person’s cells and tissues to treat a disease.

The ADA deficiency is caused by the deletion of the gene for adenosine deaminase, an enzyme crucial for the function of the ________ system.

[Biotechnology-and-its-Applications] [class-xii ]

• circulatory
• endocrine
• immune
• nervous
Correct Option: C  [ immune ]

Remark: ADA enzyme is crucial for the immune system.

The principle of antigen-antibody interaction is the basis of the diagnostic technique ________.

[Biotechnology-and-its-Applications] [class-xii ]

• PCR
• Recombinant DNA
• ELISA
• Autoradiography
Correct Option: C  [ ELISA ]

Remark: ELISA is based on the principle of antigen-antibody interaction.

The use of transgenic animals to test the toxicity of drugs is known as chemical safety testing or ________ testing.

[Biotechnology-and-its-Applications] [class-xii ]

• efficacy
• mutagenicity
• allergy
• toxicity
Correct Option: D  [ toxicity ]

Remark: Chemical safety testing is also known as toxicity/safety testing.

The ethical standards required to evaluate the morality of human activities involving genetic modification are known as ________ issues.

[Biotechnology-and-its-Applications] [class-xii ]

• legal
• political
• economic
• ethical
Correct Option: D  [ ethical ]

Remark: Ethical standards are required to evaluate the morality of such human activities (Ethical Issues).