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18. RNAi is a technique that silences genes by targeting them and degrading their mRNA. How can this technique be used in scientific laboratories?

A. RNAi is observed in nature, but it can't be used in laboratories.
B. RNAi allows scientists to turn off one gene specifically to study its effect.
C. RNAi has been used in laboratories to make bacteria more susceptible to antibiotics, but has limited application in eukaryotic cells.
D. RNAi is a powerful tool for degrading mRNA, but because it doesn't degrade other types of RNA, its use is limited.

Respuesta :

Diatonic254

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.

akopytin1316

Answer:

b. IS YOUR ANSWER

Explanation:

BC IT IS

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