以下为句子列表：
英文: But if introns do not code for protein, then why are they ubiquitous among eukaryotes yet absent in prokaryotes?
中文: 既然插入子不具有蛋白质编码，为什麽又会在真核生物的基因组中处处可见，而原核生物却没有呢？
更详细...
英文: By freeing introns from the need to splice themselves, the spliceosome would in effect have encouraged introns to proliferate, mutate and evolve.
中文: 剪接体的出现让插入子不再需要自行剪接，结果等于鼓励插入子增生、突变与演化。
更详细...
英文: Four short nucleotide sequences within introns serve as signals that indicate to the spliceosome where to cut [see box on opposite page].
中文: 在插入子的序列上，有四个简短的核苷酸序列，标示了剪接体下刀的位置（参见本页左方〈细胞的剪接机器〉）。
更详细...
英文: In short, the entry of introns into eukaryotes may have initiated an explosive new round of molecular evolution, based on RNA rather than protein.
中文: 简单的说，插入子进入真核生物后，可能启动了新一回合爆炸般的演化，这次的主角是RNA，而非蛋白质。
更详细...
英文: Instead of being junky molecular relics, introns could have progressively acquired genetic functions mediated by RNA.
中文: 插入子非但不是毫无用途的分子遗骸，反而可能以RNA为中介，逐步得到遗传上的功能。
更详细...
|
