Hey
This answer to your answer is DNA because the genetic code is the set of rules that explains how the information is transferred from DNA to the proteins. Thus, it is carried by DNA molecule in most organisms.
Hoped I Helped
Food web is more appropriate because of how wide spread the animal kingdom is, there are many predators for many different animals. For example, if a rabbit is killed by a wolf and the wolf eats a part of the carcass and leaves it, soon other scavengers will come and eat the remains, which then spans out into a web of animals, which allows us more data than what a chain may give us to visualize.
I think it my be a structure to life
Answer: They move against the concentration gradient
Explanation: This is because, with active transport, the molecules go from a low concentration to a high concentration.