| A | B |
|---|
| cell membrane | phospholipid bilayer; controls what substances can enter or leave a cell |
| cell wall | found only in plant cells; provides rigid support and protection for the cell membrane |
| mitochondria | the "powerhouse" of a cell |
| nucleus | the control center for a cell; contains the genetic material |
| RER | studded with ribosomes; responsible for producing proteins |
| SER | attached to the RER; provides lipids and other molecules |
| ribosomes | synthesize proteins |
| golgi body | modifies and packages proteins for delivery |
| lysosomes | contain digestive enzymes |
| chloroplasts | found only in plant cells; contain chlorophyll; collect energy from the sun in specialized internal structures called thylakoids |
| vacuoles | provide a site for temporary storage inside a cell |
