INTRODUCTION TO MICROSCOPY CELL BIOLOGY
DIFFERENTIATED CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which parts of the pre-mRNA must be removed before translation?
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Introns
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Exons
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Telomeres
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DNA polymerase
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Explanation:
Detailed explanation-1: -Eukaryotic pre-mRNA receives a 5′ cap and a 3′ poly (A) tail before introns are removed and the mRNA is considered ready for translation.
Detailed explanation-2: -During the process of RNA splicing, introns are removed and exons joined to form a contiguous coding sequence. This “mature” mRNA is ready for translation.
Detailed explanation-3: -During the process of splicing, introns are removed from the pre-mRNA by the spliceosome and exons are spliced back together. If the introns are not removed, the RNA would be translated into a nonfunctional protein.
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