The correct answer is A. Ribosomes.
Ribosomes are small organelles found in the cytoplasm of cells. They are responsible for protein synthesis, which is the process of building proteins from amino acids. Proteins are essential for all living things, and they play a role in many different cellular processes.
Mitochondria are organelles that are responsible for energy production in cells. They are found in the cytoplasm of cells, and they are surrounded by a double membrane. The inner membrane of the mitochondrion is folded into cristae, which increase the surface area of the membrane. This allows the mitochondrion to produce more ATP, which is the energy currency of the cell.
The cytoplasm is the jelly-like substance that fills the cell. It is made up of water, proteins, carbohydrates, lipids, and nucleic acids. The cytoplasm is where many of the cell’s chemical reactions take place.
The nucleus is the control center of the cell. It is located in the center of the cell, and it is surrounded by a double membrane. The nucleus contains the cell’s DNA, which is the blueprint for the cell. The nucleus also contains proteins that are involved in gene expression.
In conclusion, the correct answer to the question “Where does protein synthesis take place in a cell?” is A. Ribosomes.