Which of the following does not occur before a eukaryotic mRNA is exported from the nucleus?(a) The ribosome binds to the mRNA.(b) The mRNA is polyadenylated at its 3â² end.(c) 7-methylguanosine is added in a 5â²-to-5â² linkage to the mRNA.(d) RNA polymerase dissociates.
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Ответ:
a) The ribosomes binds to the mRNA
Explanation:
The binding of ribosomes to the mRNA happens during the process of translation, which takes place inside the nucleus. DNA is transcribed into messenger RNA (mRNA), and then it is translated into the nucleus, and it is here that mRNA binds to ribosomes and it directs protein synthesis with the help of transfer RNA (tRNA)
Ответ:
a) The ribosome binds to the mRNA.
Explanation:
When RNA transcript made in the nucleus of eukaryotic cells then a process known as pre-mRNA processing started. 7-methylguanosine or 5' cap is added to the start of RNA transcript and polyadenylated or 3' poly-A tail is added to the end of RNA transcript. After that, splicing of RNA transcript occurs in which introns are removed and exons are stuck back together. Then the mRNA matures and exported from the nucleus and reaches in cytoplasm and binds with the ribosome.
So, according to above scenario here the answer is (a).
Ответ:
Explanation is in the file
tinyurl.com/wpazsebu