15. RNA maturation.

Question 1

rRNA Maturation

Answer 1

• rRNA matures and synthesizes in nucleolus
• rRNA + proteins = ribosomes

Question 2

tRNA Maturation

Answer 2

• are transcribed as a common primary transcript and undergo processing consisting of two additional steps:

CCA Addition:
- The CCA sequence is added post-transcriptionally by mRNA-nucleotidyl-transferase.

Formation of Double-Stranded Regions:
- Double-stranded regions are formed by RNA ligase using energy from ATP.

Question 2

Splicing

Answer 2

• Gene Structure: Most genes contain protein-coding regions (exons) and non-protein-coding regions (introns).
• Definition: The process of removing introns and joining exons is called splicing.
• Splicing is performed after transcription.