Explore how RNA is processed after transcription through capping, splicing, and polyadenylation. Review key steps and test your understanding with practice questions.
The poly-A tail is added to the 3' end of mRNA, not the 5' end.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
Post-transcriptional modifications in eukaryotes involve intron removal, exon splicing, 5' capping, and polyadenylation.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
Translation is the process in which ribosomes synthesize proteins using mRNA as a template.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
The poly-A tail is added to the 3' end of mRNA, not the 5' end.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
Phosphorylation is a major post-translational modification that regulates protein activity.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
mRNA is not translated in the nucleus; it must first be processed and transported to the cytoplasm.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
snRNPs are components of the spliceosome that participate in removing introns during RNA splicing.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
In eukaryotes, a 5' cap (methyl guanosine triphosphate) is added to mRNA to enhance stability and translation efficiency.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
Ribozymes are RNA molecules with catalytic activity, such as those involved in RNA splicing.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
The poly-A tail is added to the 3' end of mRNA, not the 5' end.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
RNA splicing is a post-transcriptional modification that removes introns from pre-mRNA in eukaryotes.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
The poly-A tail protects eukaryotic mRNA from degradation and aids in translation efficiency.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Post-Transcriptional Modifications - Capping Splicing Polyadenylation
