A polysome is ____. a. the complex that adds a poly(A) tail onto an mRNA b. an mRNA transcript to which multiple ribosomes are attached c. the combination of a large and a small ribosomal subunit d. the promoter assembly at the site of transcription initiation e. the complex where mRNA splicing occurs

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26-03-2020
Biology

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A polysome is ____. a. the complex that adds a poly(A) tail onto an mRNA b. an mRNA transcript to which multiple ribosomes are attached c. the combination of a large and a small ribosomal subunit d. the promoter assembly at the site of transcription initiation e. the complex where mRNA splicing occurs

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mboluwape mboluwape · Answer 1 · 2020-03-26T21:20:01+01:00

Answer:b. an mRNA transcript to which multiple ribosomes are attached

Explanation: polysome consist of mRNA complex and two or more ribosome coming together to translate mRNA into a polypetide or amino acid. It helps produce many polypeptide from a single mRNA.

Different ribosomes bind to the mRNA at different time elongating the polypeptide chain. We have the free( non-poly A ) and memberane bound (poly A) polysome.