Chloroplasts contain the green pigment chlorophyll that, along with enzymes, absorbs light energy and synthesizes sugar.
DNA is a long polymer with deoxyriboses and phosphate backbone. Having four different nitrogenous bases: adenine, guanine, cytosine and thymine. RNA is a polymer with a ribose and phosphate backbone. Four different nitrogenous bases: adenine, guanine, cytosine, and uracil.
The cells go through a process that go from basic to more specialized cells that build tissues and serve various functions. I hope that this is the answer that you were looking for and it has helped you. Have a nice day.