Which of the following techniques is used to create transgenic animals by introducing foreign DNA into the pronucleus of a fertilized egg?
AMicroinjection
BElectroporation
CGene gun method
DBiolistic bombardment
Correct Answer:
A. Microinjection
EXPLANATION
Microinjection is the standard technique for creating transgenic animals by directly injecting DNA into the pronucleus of a fertilized egg, allowing integration into the genome.
What is the primary concern regarding the large-scale cultivation of Bt crops in India?
AIncreased soil fertility
BDevelopment of insect resistance and impact on non-target organisms
CImproved nutritional content
DReduced water requirements
Correct Answer:
B. Development of insect resistance and impact on non-target organisms
EXPLANATION
Major concerns include the development of resistance in target insects, impacts on non-target beneficial organisms, and long-term ecological effects of Bt crop cultivation.
Which enzyme is used to synthesize cDNA from mRNA in reverse transcription?
AReverse transcriptase
BDNA polymerase
CRNA polymerase
DPrimase
Correct Answer:
A. Reverse transcriptase
EXPLANATION
Reverse transcriptase, derived from retroviruses, synthesizes complementary DNA (cDNA) from an mRNA template, essential for expressing eukaryotic genes in prokaryotes.
In the year 2023-24, which Indian institute developed the CRISPR-based diagnostic kit for disease detection?
AIIT Delhi
BCSIR-IGIB
CIIT Bombay
DAll of the above
Correct Answer:
B. CSIR-IGIB
EXPLANATION
CSIR-Institute of Genomics and Integrative Biology (IGIB) has been at the forefront of developing CRISPR-based diagnostic tools for various diseases in India.
What is a chimeric gene in the context of genetic engineering?
AA gene that codes for a hybrid protein
BA gene composed of DNA sequences from different sources combined to create a new functional unit
CA gene that only exists in chimeric animals
DA mutated gene with no function
Correct Answer:
B. A gene composed of DNA sequences from different sources combined to create a new functional unit
EXPLANATION
Chimeric genes combine regulatory sequences from one organism with coding sequences from another, creating novel genetic constructs for transgenic organism development.
In the context of gene therapy, what does 'ex vivo' gene therapy mean?
AGene therapy administered outside the body to isolated cells
BGene therapy administered directly into the patient's body
CGene therapy using viral vectors only
DGene therapy that affects only the lungs
Correct Answer:
A. Gene therapy administered outside the body to isolated cells
EXPLANATION
Ex vivo gene therapy involves isolating cells from the patient, modifying them genetically outside the body, and then reintroducing them, reducing immune reactions.