In E. coli, a cluster of three genes called the lac operon
produce enzymes that break
apart lactose. To the side of the genes is a region called the Choose...
, where RNA
polymerase binds, and another region called the Choose...
where the lac repressor
binds.

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

If you want to double a batch of brownies you must have double the ingredients before you start cooking similarity a cell must double its contents including its dna prior to dividing