The UTR [untranslated regions] in an mRNA:

1. Are present only at 5’ end and are not required for efficient translation
2. Are present only at 3’ end and are not required for efficient translation
3. Are present at both 5’ and 3’ends and are not required for efficient translation
4. Are present at both 5’ and 3’ ends and are required for an efficient translation process

Subtopic:  Translation Mechanism |
 80%
Level 1: 80%+
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