<span>I think the right answer is A</span>
Answer:
B
Explanation:
RNAi is a cellular mechanism for post-transcriptional gene silencing. After transcription of a gene into mRNA, small interfering RNA (siRNA) and microRNA (miRNA) can target the mRNA to form dsRNA. This mRNA then becomes a target of ribonucleases such as the Dicer that break it apart. These mRNA, therefore, do not reach the cytoplasm for translation by ribosomes. This mechanism is hence harnessed and manipulated by scientists to study genes by silencing them.
Answer:
Mitochondria
Explanation:
Protein synthesis can also occur in the mitochondria of the cell since mitochondria contains its own ribosomes and DNA (mDNA)
The lungs can show aging!