Which of the following modifications can occur to mRNA before it is translated?

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Question: Which of the following modifications can occur to mRNA before it is translated?

Options:

Correct Answer: All of the above

Solution:

All of the above modifications (5\' capping, 3\' polyadenylation, and RNA splicing) occur to mRNA before it is translated.

Which of the following modifications can occur to mRNA before it is translated?

Which of the following modifications can occur to mRNA before it is translated?

Step 1: Understand that mRNA is a type of RNA that carries genetic information from DNA to the ribosome for protein synthesis.
Step 2: Learn that before mRNA can be translated into a protein, it undergoes several modifications.
Step 3: Identify the first modification called '5' capping', where a special cap is added to the beginning of the mRNA strand to protect it and help it be recognized by the ribosome.
Step 4: Recognize the second modification called '3' polyadenylation', where a tail of adenine nucleotides (poly-A tail) is added to the end of the mRNA to protect it and assist in the export from the nucleus.
Step 5: Understand the third modification called 'RNA splicing', where non-coding regions (introns) are removed from the mRNA, and the coding regions (exons) are joined together to form a continuous sequence that can be translated into a protein.
Step 6: Conclude that all these modifications (5' capping, 3' polyadenylation, and RNA splicing) are necessary for the mRNA to be properly processed before it is translated into a protein.

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