| The cell membrane is considered the ____ of a cell. |
control center |
| The diffusion of water across a cell membrane is called ____. |
gatekeeper |
| Unlike mitochondria, chloroplasts contain ____ membranes. |
osmosis |
| The nucleus is considered the ____ of a cell. |
ribosomal |
| The ____ endoplasmic reticulum produces proteins. |
rough |
| Mitochondrion is to matrix as chloroplast is to ____. |
smooth |
| The ____ endoplasmic reticulum produces lipids. |
stroma |
| Molecules of ____ RNA are synthesized in the nucleolus. |
thylakoid |
