| A | B |
|---|
| Teh cell is a unit of | structure and function |
| Cell Membrane | is composed of phospholipids and proteins |
| Phospholipid heads | are hydrophilic |
| Phospholipid tails | are hydrophobic |
| Molecules diffuse | from an area of high concentration to a low concentration |
| Passive transport | does not require the addition of energy |
| There is a ___ concentration of oxygen in water compared to air | Low |
| Facilitated diffusion | requires a transport protein but still works with the concentration gradient |
| The nucleoid is | the region of a prokaryotic cell where the chromosome attaches to the membrane |
| Cell walls are composed of | cellulose |
| Solutions with high salt concntrations cause | cells to lose water |
| Chloroplasts allow organisms to | make their own food (photosynthesis) |
| All cells come | from preexisting cells |
| Bacteria cells do not have | a definite nucleus |
| The cell theory was advanced by | Thomas Schleiden and Theodor Schwann |
| During mitosis, chromatin in the nucleus condenses and becomes visible as | chromosomes |
| Unlike animal cells, plant cells contain | cell walls and chloroplasts |
| If a cell is placed in pure water it will | swell |
| Endocytosis | process by which very large molecules enter the cell |
| The nucleus | is the control center of the cell |
| The mitochondria | carry out aerobic respiration |
| Ribosomes | produce proteins |
| The cytoskeleton | enables some cells to move |
| Active transport | requires the addition of energy and works against the concentration gradient |
| Cystic fibrosis | disrupts the movement of chloride ions through the cell membrane |
