例句與造句

1. Darnell also found the clearest example of how the surface of a cell signals genes in its nucleus.
2. The constitutive promoter for the output gene keeps it " on " and is only deactivated when ( similar to the AND gate ) a complex as a result of two input signal gene products blocks the expression of the output gene.
3. It's difficult to find signal gene in a sentence. 用signal gene造句挺難的