Splicing

1.    Name polarity of the hnRNA where capping and tailing done.

• 5' - 3'

• 3' - 5'

• ONLY AT 5'

• ONLY AT 3'

The DNA sequences that become the part of the mRNA are called?

• Introns

• Exons

• Cistron

• Polycistron

1.    What is the primary function of the 5' cap in mRNA?

• Protection from degradation

• Translation initiation

• Splicing of introns

• Transcription termination

3.    During which process are introns removed from the pre-mRNA?

• Transcription

• Translation

• Splicing

• Replication

The enzyme that catalyses the process elongation is -----

• DNA Polymerase

• RNA Polymerase

• Rho Factor

• Sigma factor

1.    What is the role of the poly-A tail in mRNA?

• Facilitates nuclear export

• Enhances translation efficiency

• Protects from exonuclease degradation

• All of the above

3.    What is the function of the spliceosome?

• To synthesize RNA

• To remove introns from pre-mRNA

• To add a 5' cap to mRNA

• To initiate transcription