Asked by Kaitlyn Shearer on May 21, 2024
Verified
The addition of a poly-A tail to mRNA occurs after which of the following?
A) replication
B) transcription
C) translation
D) translocation
E) termination
Poly-A Tail
A stretch of adenine nucleotides added to the 3' end of mRNA molecules in eukaryotic cells, aiding in stability and export from the nucleus.
mRNA
Messenger RNA, a type of RNA that conveys genetic information from DNA to the ribosome, where it specifies the amino acid sequence of the protein product.
Transcription
The process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA).
- Understand the process of transcription and its significance in protein synthesis
Verified Answer
AL
anastasia lewisMay 22, 2024
Final Answer :
B
Explanation :
The addition of a poly-A tail occurs after transcription, during mRNA processing. This modification helps protect the mRNA from degradation and also facilitates its export from the nucleus to the cytoplasm for translation. Replication and translocation do not involve mRNA and occur in different parts of the cell. Translation and termination occur after the addition of the poly-A tail.
Learning Objectives
- Understand the process of transcription and its significance in protein synthesis