| A | B |
|---|
| DNA and RNA are | nucleic acids |
| molecules moving from areas of high to low concentration | diffusion |
| sugar molecules combine to form | starches |
| what speeds up a chemical reaction? | enzymes |
| movement of molecules through a cell membrane without using energy | passive transport |
| water molecules moving through a selectively permeable membrane | osmosis |
| movement of materials when energy is needed | active transport |
| what is produced by photosynthesis | oxygen and sugar |
| what captures energy form sunlight during photosynthesis | chlorophyll |
| what happens during respiration | glucose gets broken down releasing energy |
| respiration occurs in what cell structure | mitochondria |
| what happens during photosynthesis | the cell uses sunlight to make food |
| respiration in most cells requires what | oxygen |
| respiration and photosynthesis help keep the levels of oxygen and carbon dioxide what? | fairly constant |
| energy is produced without using oxygen by what process | fermentation |
| what causes lactic acid fermentation | too little oxygen in cells |
| mitosis is the cell cycle stage where what happens | the nucleus divides into two new nuclei |
| what happens during cytokinesis | the cell membrane pinches off and two new "daughter cells" are formed |
