What drove the transition from such membranes to modern ones , which are based on the more complex phospholipids ?
这种的简单膜结构转变成现代的基于磷脂的版本是由什么驱使的？
Alternatively , another darwinian tableau might see the random development of ribozymes able to add phospholipids , the stuff of modern membranes , to outer fatty acid membranes .
A primitive rna might have catalysed the synthesis of phospholipids , but what advantage would phospholipids have conferred on primordial cells ?
一种原始的rna可能催化了磷脂的合成，但是磷脂又授予了原生细胞什么优势呢？
Like phospholipids , these simpler fatty acids form double-layered protocell walls that keep large molecules in . But unlike phospholipids , they allow nucleotides , the small building blocks of genetic material , to pass through .
