What's hanging off of the side of this long molecule that's formed by polymerizing nucleotides are - is this base unit.

在这条由多聚核苷酸,构成的长链分子,一侧悬挂着碱基单位

耶鲁公开课 - 生物医学工程探索课程节选

If I told you that 'draw me a nucleotide from RNA that has ', you could go back to this picture and you could draw the whole thing.

如果让你找RNA中碱基是A的核苷酸,你可以看着这个图,就能找出其全部结构

耶鲁公开课 - 生物医学工程探索课程节选