What is the 5' cap made of and what functions does it serve?

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Multiple Choice

What is the 5' cap made of and what functions does it serve?

Explanation:
The 5' cap is a 7-melyguanosine (m7G) structure added to the first nucleotide of the nascent mRNA via a 5'-5' triphosphate bond, installed by capping enzymes during transcription by RNA polymerase II. This cap protects the message from 5' exonuclease degradation, helps direct proper splicing by providing binding surfaces for splicing factors, and facilitates translation initiation by attracting cap-binding proteins (such as the cap-binding complex and initiation factors) that recruit the ribosome. It also aids in efficient nuclear export and overall mRNA stability.

The 5' cap is a 7-melyguanosine (m7G) structure added to the first nucleotide of the nascent mRNA via a 5'-5' triphosphate bond, installed by capping enzymes during transcription by RNA polymerase II. This cap protects the message from 5' exonuclease degradation, helps direct proper splicing by providing binding surfaces for splicing factors, and facilitates translation initiation by attracting cap-binding proteins (such as the cap-binding complex and initiation factors) that recruit the ribosome. It also aids in efficient nuclear export and overall mRNA stability.

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