| A | B |
|---|
| cell wall | a rigid layer that surrounds the cells of plants |
| cell membrane | controls which substances pass into and out of a cell |
| nucleus | the cell's control center that directs all of the cell's activities |
| organelles | tiny cell structures that carry out specific functions within the cells |
| ribosomes | small grain-shaped organelles that produce proteins |
| cytoplasm | gel-like substance that contains organelles |
| mitochondria | converts stored energy in food to energy the cell can use to live and function |
| smooth endoplasmic reticulum | smooth ER; transports lipids and breaks down toxins |
| golgi apparatus | packages and delivers proteins |
| vacuole | a sac that stores water, food, and waste for the cell |
| chloroplasts | captures energy from sunlight and changes it to a form of energy cells can use to make food |
| lysosomes | breaks down larger molecules into smaller ones; the digestion center |
| multicellular | made of many cells |
| unicellular | made of one cell |
| chromatin | contains instructions for all cell activities |
| rough endoplasmic reticulum | rough ER; transports proteins throughout the cell |
| nuclear membrane | regulates what passes in or out of the nucleus |
| centrioles | active during cell division in animals |
| capsule | protects bacteria cells from a host's immune system |
| nucleoid | DNA found in a bacteria cell |
| nuclear pore | holes that allow materials to pass in and out of the membranee |
| plasmid | small circular pieces of DNA in a bacteria cell |
