遗传信息在基因中的排列是指四种碱基a、C、G、T的排列。
Heredity information array in genes is the four bases a, C, g, t array.
它们可以附在胞核嘧啶上,胞核嘧啶是组成基因代码的“字母”的四种碱基数之一,帮助调控转录的过程。
These can attach themselves to cytosine , one of the four chemical bases that form the "letters" of the genetic code.
其中碳水化合物都是由单糖构成的,蛋白质是由20种氨基酸构成的,核酸是由核糖、脱氧核糖、和5种碱基构成。
Carbohydrates are made of simple sugars, proteins are made up of 20 amino acids, and nucleic acids are compose of oxy - and deoxy - nucleic sugars and 5 base pairs.
Because it takes three units where there's only four choices at each position to have at least 20 unique combinations.
因为每个位点上仅有四种可能性,只有采用三个碱基一组,才能取得至少二十种不同的组合方式
There are 64 combinations of three bases and I only need to describe 20, so there's combinations to spare.
三个一组的碱基产生六十四种组合,而我只需对应二十种氨基酸,所以一种氨基酸会对应不同密码子
I'd only have 16 possible two base sequences, that's not enough to specify over 20 amino acids.
如果两个碱基一组那一共只有十六种组合,不够和二十种氨基酸来一一对应
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