Name: ________________________________________
Unit 3: Cells
Review
Per. _______
Cell Theory:
1. All living things are composed of one or more cells.
2. The cell is the basic unit of life.
3. All cells come from pre-existing cells.
Cells:
4. Structures inside a cell are called organelles
5. Complete the following according to increasing complexity:
cells  tissues 
organs 
organ systems 
organism
Parts of Cells:
6. cell wall: support & protect plants
7. cell membrane: controls movement of materials into and out of cell
8. cytoplasm: holds organelles together
9. nucleus: control center; holds instruction
10. ribosome: makes (synthesizes) PROTEINS
11. endoplasmic reticulum: transport system of cell
12. Golgi apparatus: packages & secretes proteins
13. lysosomes: digest materials
14. vacuoles: store food, water, and wastes
15. chloroplast: site of photosynthesis
16. centrioles: only in animal cells; used for cell division
(I forgot to put mitochondria- respiration- energy- ATP)
Cell Membrane:
17. In diffusion, molecules move from high concentration to low concentration. Energy is not used.
18. Diffusion of water is called osmosis
19. In active transport, molecules move from low concentration to high concentration. This process uses energy
20. Receptor proteins recognizes & receives chemical signals to allow cellular communication.
21. The diagram represents two single-celled organisms.
These organisms carry out the activities needed to maintain homeostasis by
using specialized internal
(1) tissues
(2) organelles
(3) systems
(4) organs
22. Which sequence represents the correct order of levels of organization
found in a complex organism?
(1) cells  organelles organs  organ systems  tissues
(2) tissues  organs  organ systems  organelles  cells
(3) organelles  cells  tissues  organs  organ systems
(4) organs  organ systems  cells  tissues  organelles
23. In the cell shown, which lettered structure is responsible for the excretion of most
cellular wastes?
(1) A
(2) B
(3) C
(4) D
24. The diagram shows molecules represented by X both outside and inside of a cell.
A process that would result in the movement of these molecules out of the
cell requires the use of
(1) DNA
(3) ATP
(2) antigens
(4) antibodies
high
low
w
25. In the diagram, the dark dots indicate small molecules. These molecules are
moving out of the cells, as indicated by the arrows. The number of
dots inside and outside of the two cells represents the relative
concentrations of the molecules inside and outside of the cells.
ATP is being used to move the molecules out of the cell by
(1) cell A, only
(3) both cell A and cell B
(2) cell B, only
(4) neither cell A nor cell B
high
low
low
high
w
A laboratory setup using an artificial cell made from dialysis tubing is
shown in the diagram.
26. Identify the process that would most likely be responsible for the
movement of glucose from inside the artificial cell to the solution
outside of the cell. diffusion
A wet-mount slide of red onion cells is studied using a compound light microscope. A drawing of one of the cells as
seen under high power is shown below.
27. On the diagram below, label the location of each of the cell structures listed: cell wall; cytoplasm; cell
membrane.[1]
cytoplasm
cell wall
cell membrane
28. Describe the proper way to add a saltwater solution to the cells without removing the coverslip.
1. place a drop of saltwater solution on one side of the coverslip.
2. place a piece of paper towel on the other side of the coverslip to suck out excess water. Saltwater will
move right into the slide.