高雄醫學大學(後西醫)
114年
普通生物及生化概論
第 40 題
The ENCODE project revealed that a large portion of the genome is transcribed into RNAs, far more than can be accounted for by protein-coding genes. What is a likely role that these RNAs might play?
- A Serve as templates for protein synthesis
- B Catalyze metabolic reactions in the cytoplasm
- C Act as structural components of ribosomes
- D Transport amino acids to the ribosome
- E Regulate gene expression by blocking translation or causing degradation of mRNA
思路引導 VIP
如果我們把合成蛋白質比喻為工廠正在「生產零件」,而基因組產出的這些大量 RNA 並非零件的「設計圖」(mRNA),也不屬於「組裝機器」(核糖體)或「搬運車」(tRNA),那麼在一個高度自動化的工廠裡,還有什麼樣的角色是不可或缺的,能用來確保零件不會生產過剩、或是能在正確的時間點停止生產線呢?
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(一邊端著紅茶,以奇怪的姿勢啜飲一口,冷冷地看著你) 還不賴嘛,小鬼。看來你沒有把腦袋丟在戰場上,精準地掌握了現代分子生物學的進階觀念。
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