Answer:
lactose, repressor, RNA polymerase (or mRNA might fit here), transcription, repressor, RNA polymerase
Explanation:
Hope this will help.
Https://s-media-cache-ak0.pinimg.com/564x/5f/38/fc/5f38fc3ce20c9b6deb0613f73c82e03a.jpg
Here is a image. Hope this helps :)
<span>Long tail for swimming
<span>Head for getting into the female cell
Hope this helps you ! :') </span></span>
Two of the most important energy-carrying molecules are glucose and ATP.