Question

Processing of the mRNA begins before transcription of eukaryotic mRNA is complete.the end of the mRNA is prepared for recognition by the ribosomes of the cell and protected from exonuclease degardation by a process called " capping".during this multi-step process a nuleoside is added to the end of the mRNA and then modified.complete the following statements about the capping process.
1- capping occurs at the _____ end of mRNA.

2- the nucleside added is ________.

3- the nuceloside is connected to the mRNA through a _____ linkage.

4- the added nuceloside is modified by methylation at_____ atom.

5- the mRNA is modified by methylation of ribose residues at the ______-hydroxy position.

choose from this list..

5' 2' guanosine phoshate anitrogen

3' 4' cytidine diphosphate

an oxyen adenosine uridine triphosphate

Answer 1

Answer:

Explanation:

1- Capping occurs at the 5' end of mRNA.

2- The nucleside added is 7-methylguanosine.

3- The nuceloside is connected to the mRNA through a 5′ to 5′ triphosphate linkage.

4- The added nuceloside is modified by methylation at the nitrogen atom.

5- The mRNA is modified by methylation of ribose residues at the 2'-hydroxy position.