What biological macromolecule is made up of monomers like the one shown below? 
[A monomer made up of a nitrogenous base, a five-carbon sugar, and a phosphate group bonded together.]
A) Carbohydrate  	 
B) Nucleic acid  	 
C) Fat  	 
D) Protein
                                             
                                          
                                          
                                        
											 
			                  