F5 Bio genetics 密碼子
2011-06-30 12:54 am
寫密碼子個陣, T變A, U變A, C變G, G變C......應該無記錯啦? 咁我想問A係咪可以變T / U ? 幾時變T? 幾時變U? 點記??????
回答 (2)
2011-07-08 8:00 pm
✔ 最佳答案
首先澄清一點: T變A, U變A, C變G, G變C... 唔係變呵!分開兩件事:
1. DNA replication複製時, (DNA複製出DNA):
T對應著A, A對應著T, C對應著G, G對應著C.
單條DNA 上, TAC複製出既DNA條就是ATGC.
多一個例子, TATTGGCA複製就會得出: ATAACCGT. (當然是一條ＤＮＡ啦）
OK?
2. DNA transcription翻譯作RNA時, (DNA譯出RNA) 由於 RNA沒有 T, 只有U, 所以:
T譯作A, A譯作U, C譯作G, G譯作C.
TACG既譯出既RNA就是AUGC.
多一個例子, TATTGGCA翻譯就會得出: AUAACCGU.(當然是一條ＲＮＡ啦）
咁樣清楚D未?
2011-07-01 12:12 am
這是因為DNA和RNA的分別。
RNA and DNA are both nucleic acids. The complementary base to adenine is not thymine, as it is in DNA, but rather uracil, which is an unmethylated form of thymine.
RNA and DNA are both nucleic acids. The complementary base to adenine is not thymine, as it is in DNA, but rather uracil, which is an unmethylated form of thymine.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110629000051KK00627