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RNA Pathway Video Lecture - Biology Class 12 - NEET

157 videos|398 docs|239 tests

FAQs on RNA Pathway Video Lecture - Biology Class 12 - NEET

1. What is the RNA pathway?
Ans. The RNA pathway refers to the process by which RNA molecules are synthesized, modified, and degraded within a cell. It involves various steps such as transcription, splicing, RNA editing, and degradation, which collectively regulate gene expression and contribute to cellular functions.
2. How does transcription relate to the RNA pathway?
Ans. Transcription is a crucial step in the RNA pathway. It is the process by which DNA is used as a template to synthesize RNA molecules. During transcription, an enzyme called RNA polymerase binds to a specific region of the DNA, known as the promoter, and synthesizes a complementary RNA molecule based on the DNA template. This newly synthesized RNA molecule then undergoes further modifications and processing to become a functional RNA molecule.
3. What is the significance of RNA splicing in the RNA pathway?
Ans. RNA splicing is a process in which non-coding regions, called introns, are removed from the pre-mRNA molecule, and the remaining coding regions, called exons, are joined together to form a mature mRNA molecule. This splicing process plays a crucial role in the RNA pathway as it enables the generation of multiple protein isoforms from a single gene, thereby increasing the diversity of proteins that can be produced by an organism.
4. How does RNA editing occur in the RNA pathway?
Ans. RNA editing is a post-transcriptional modification process that can alter the nucleotide sequence of RNA molecules. It occurs through specific enzymatic reactions that introduce changes, such as nucleotide substitutions, insertions, or deletions, into the RNA molecule. RNA editing can result in the production of different protein isoforms or modulate the stability and function of RNA molecules, thereby influencing gene expression and cellular processes.
5. What happens to RNA molecules during degradation in the RNA pathway?
Ans. RNA degradation is an essential process in the RNA pathway that helps regulate gene expression and maintain cellular homeostasis. Different mechanisms are involved in RNA degradation, including exonucleases and endonucleases that break down RNA molecules into smaller fragments. These fragments are subsequently further degraded by specialized enzymes. The degradation of RNA molecules allows for the removal of faulty or unnecessary transcripts, preventing their accumulation and potential interference with cellular processes.
157 videos|398 docs|239 tests
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