Answers:
1. It's called the gatekeeper because the cell membrane serves as a barrier that keeps many foreign substances from entering the cell.
2. Mitochondria is known as the energy factory because of its role in extracting energy from food through the process of respiration.
3. The nucleus is the boss of the cell because it controls the entire cell
4. DNA is stored within a chromosome.
5. The Golgi complex sorts, modifies, and assembles proteins.
6. Protein is made from amino acids.
7. The vacuole's function is to store material.
8. Diffusion and active transport are opposites because diffusion is a non-active method for moving molecules across the cell membrane, whereas active transport involves the use of energy within the cell to move molecules.
