Active transport refers to a substance moving from areas in which it has low concentration to an area with high concentration, one example i guess is endocytosis, "<span>the taking in of matter by a living cell by invagination of its membrane to form a vacuole"</span>
Answer:
It is only nucleotide phosphates e.g. adenosine triphosphate (ATP) that stores energy for all cell's use. It is also a molecule that is similar to one of the nucleic acids in DNA and RNA.
Well there is Google for a reason. "Definition of nucleic acid". "What is nucleic acid". I'll give you the definition though. A complex organic substance present in living cells, especially DNA or RNA. The molecules consist of many <span>nucleotides linked in a long chain.</span>
The S phase is where DNA is replicated occuring in G1 phase and G2 phase
