What term describes the strings of ribosomes that are attached to an RNA transcript at one time? A. release factors
B. spliceosomes
C. transcription factors
D. mutagens
E. polyribosomes

Polyribosomes.

Explanation:

During translation, the subunits of a ribosome surround the transcript and read down stream until they reach the start codon and begin polypeptide synthesis. Once the start codon is exposed, it is available for another ribosome to form around it, thereby initiating another locale for translation. Together the strings of ribosomes are called polyribosomes.

answer: b

coz red blood cells marrow and circulates the body for 120 days.