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 |

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