MCQ
Portion of gene which is transcribed but not translated is:
- AExon
- BIntron
- CCistron
- DCodon
Explanation:
The process of RNA synthesis from DNA is called transcription. During transcription, the complete gene is copied into a pre-mRNA along with exons and introns.
The exons are the coding regions and the introns are the non-coding regions. The process of RNA splicing converts the pre-mRNA to mRNA and involves the removal of introns and the joining of exons.
This results in the formation of the mature mRNA that is translated into a protein.
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$I.$ Gene therapy is a genetic engineering technique used to treat diseases at molecular level.
$II.$ Calcitonin is medically useful recombinant product in the treatment of infertility.
$III.$ Bt toxin is a biodegradable insecticide obtained from Bacillus thuringiensis.
Reason : Condoms secrete anti-viral interferons.