The structure contains the chromosomes, and controls protein synthesis and transmission of hereditary information is oreer a. Nucleus b. Endoplasmic reticulum c. Centrioles d. Mitochondria

The correct answer is a. Nucleus.The nucleus is the organelle in a cell that contains the chromosomes and controls protein synthesis and the transmission of hereditary information. It is the control center of the cell and plays a crucial role in storing and transmitting genetic information. The nucleus is surrounded by a double membrane called the nuclear envelope, which separates the contents of the nucleus from the cytoplasm of the cell.