I believe all of the above!
Answer:
Chloroplast of the plant cell.
Explanation:
Answer: Combining a basic API with citric acid to produce the citrate salt of the API.
Explanation:
Chemical modifications refers to the processes that involve changes in the general composition of drugs to produce another entity with different chemical properties.
From the answer, Basic API combine with citric acid to produce the citrate salt of API which have different chemical properties from the reactants.
Both have phosphate-pentose back bone, as well as both have adenine, cytosine and guanine bases.