Would the coupling of the processes shown below be found in a eukaryotic cell? explain why or why not. A diagram of transcription and translation in a eukaryotic cell. Four rna polymerases located one after another in short distances transcribe a strand of dna in the direction from left to right. A polyribosome, comprised of several ribosomes, is attached to every rna polymerase. Each ribosome is located on the mrna strand like beads and translates mrna into polypeptides. The 5 prime end of mrna does not contain any ribosomes and is the first to appear during transcription. Drag the terms on the left to the appropriate blanks on the right to complete the sentence.

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dkparkers7750 dkparkers7750

03-03-2022
Biology

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Would the coupling of the processes shown below be found in a eukaryotic cell? explain why or why not. A diagram of transcription and translation in a eukaryotic cell. Four rna polymerases located one after another in short distances transcribe a strand of dna in the direction from left to right. A polyribosome, comprised of several ribosomes, is attached to every rna polymerase. Each ribosome is located on the mrna strand like beads and translates mrna into polypeptides. The 5 prime end of mrna does not contain any ribosomes and is the first to appear during transcription. Drag the terms on the left to the appropriate blanks on the right to complete the sentence.

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marianaegarciaperedo marianaegarciaperedo · Answer 1 · 2022-03-15T15:48:43+01:00

Polyribosomes are groups of ribosomes linearly arranged, associated with mRNA, and producing several copies of proteins. The coupling of processes shown in the image can not be found in eukaryotic cells.

What is a polyribosome?

A polyribosome is a group of single ribosomes associated with an mRNA molecule and producing simultaneous translation events of the same protein.

Polyribosomes can be found in both prokaryotic and eukaryotic cells. However, translation occurs at different moments and places in these cells.

⇒ In a prokaryotic cell

Polyribosomes can act before transcriptional termination occurs.

While transcription is still happening, ribosomes can produce many polypeptide copies.

This is because

both transcription and translation occur in the cytoplasm simultaneously.

transcription and translation directions are 5' to 3'.

mRNA does not need to be modified after transcription.

⇒ In eukaryotic cells

Polyribosomes are found in the cytoplasm but only when

the transcription process is over,

the mRNA molecule is already modified and left the nucleus.

Since transcription occurs in the nucleus and translation in the cytoplasm, they can not be simultaneous.

According to this information, the coupling of processes shown in the image can not be found in eukaryotic cells.

You can learn more about eukaryotic and prokaryotic translation at

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