A monomer made up of a nitrogenous base, a five-carbon sugar, and a phosphate group bonded together.
It's high sensitivity I believe
The best answer should be
D) Food component that can be stored in the body for future energy needs
It will all make more sense if you start from the beginning of the sequence with the structure of DNA. You will remember that messenger RNA contains a sequence of bases which, read three at a time, code for the amino acids used to make protein chains. Each of the sets of three bases is known as a codon.