Polyribosomes .
protect the mRNA from degradation
increase the rate of polypeptide synthesis from a single mRNA
allow coupled transcription and translation
increase the rate of transcription

B. Increase the rate of polypeptide synthesis from a single mRNA.

Hope this helped.

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can