7 th Grade Cells Review

1. Which statement is not a part of the cell theory? (1) Cells are the basic unit of structure of living things. (2) Cells are the basic unit of function of living things. (3) Cell parts such as chloroplasts are self-replicating. (4) Cells come from preexisting cells.

2. Give the cell organelle that performs each function. 1.Transport materials throughout the cell 2.Protein production 3.Digests food 4.Regulates what enters and leaves the cell 5. Produces energy

6. Controls all cell activities 7. Holds cell organelles 8. Site of photosynthesis 9. Used in cell division 10. Gives plant cell shape and support 11. Stores materials

3. Identify all the organelles labeled and give the function of each.

4. What type of cell is represented? 5. What is structure B? What is the function of this structure? 6. What is the function of structure C? 7. Explain how structure A maintains homeostasis within the cell?

8. Identify the structures labeled and the function of each.

9. One difference between plant and animal cells is that animal cells do not have (1)a nucleus (2)chloroplasts (3)a cell membrane (4)centrioles

10. Which structure permits the entry and exit of materials in an animal cell? (1.) lysosome (2.) chromosome (3.) cell wall (4.) cell membrane

11. The structure most closely associated with the destruction of worn out cell organelles is the (1.) lysosome (2.) centrosome (3.) vacuole (4.) chromosome

12. Which is found in the nucleus? (1.) ribosome (2.) vacuole (3.) lysosome (4.) chromosome

13. The rigidity (support) of a plant cell is due primarily to the presence of the (1) chloroplasts (2) centrosomes (3) cell membrane (4) cell wall

14. Whitney observes a cell under the microscope. She identifies it as a green plant cell and not a cheek cell because of a (1.) nucleus (2.) cell membrane (3.) chloroplast (4.) mitochondrion

15. Which structure is found ONLY in animal cells? (1.) cell wall (2.) vacuoles (3.) centrioles (4.) chloroplasts

16. The organelle most closely associated with the manufacture of proteins within the cell is the (1.) ribosome (2.) nucleolus (3.) cell wall (4.) cell membrane

17. What is this structure called? 18. In what kind of cell is this structure found? 19. What process occurs in this structure?

20. What is this structure called? 21.What is the function of this organelle? 22. In what kind of cells would you find this organelle?

23. Which sequence of terms is in the correct order from simplest to most complex? (1) cells, tissues, organs, organ systems (2) tissues, organisms, cells, organ systems (3) cells, tissues, organ systems, organs (4) organs, organisms, organ systems, cells

24. Explain two differences between prokaryotic and eukaryotic cells.

25. Give an example of a prokaryotic cell. 26. Give an example of a eukaryotic cell.

27. The breakdown of organic compounds to produce ATP is known as (1)cellular respiration (2)transpiration (3)active transport (4) photosynthesis

28. An important molecule generated by both lactic acid fermentation and alcoholic fermentation is (1) ATP (2) CO 2 (3) CO 2 (4) H 2 O

29. C 6 H 12 O 6 + 6O 2  6CO H 2 O + X a. What is the name of the process represented above? b. Where does this process occur? c. What molecule does X represent? d. What material is needed for this process to occur? e. What are 2 wastes produced in this process?

30. Aerobic respiration and fermentation are similar in that both processes (1.) require oxygen (2.) utilize light energy (3.) release energy (4.) produce carbohydrates

31. When muscles are exercised extensively in the absence of sufficient oxygen, (1) lactic acid is produced (2) a large amount of ATP is formed (3) no energy is produced (4) aerobic respiration occurs

32. Yeast produce alcohol and CO2 in the process of (1)lactic acid fermentation (2)alcoholic fermentation (3)aerobic respiration (4) nutrition

33. In the presence of oxygen, _____ molecules of ATP can be formed. (1)2 (2) 19 (3) 36 (4) 63

34. The life function of transport in an organism directly involves those activities used to: 1.absorb and distribute materials 2.obtain and break down materials 3.release energy from food 4.produce cellular waste products

35. What type of transport does this picture represent? 36. Explain your answer.

37. The diagram above shows the same type of molecule in area A and area B. With the passage of time, some molecules move from area A to area B. This movement is the result of the process of __________.

38. The movement of materials from higher to lower concentration is called (1.) diffusion (2.) active transport (3.) pinocytosis (4.) phagocytosis

39. The movement of materials from lower to higher concentration requiring energy is called (1.) movement (2.) diffusion (3.) active transport (4.) cell division

40. Diffusion is a term for the movement of molecules from (1) an area of low concentration to a high concentration (2) an adjacent area to a gradient area (3) an area of high concentration to a low concentration (4) a nucleus to the mitochondria

41. Which life process is being described? a.Moving parts of the body b.Maintaining a stable internal environment c.Sum total of all life processes d.Production of energy e.Control and coordination f.Movement of materials in and out of a cell g.Production of new organisms

42. Which life process is being described? a.Taking in materials from the environment that an organism needs b.Cell division and an increase in cell size c.The type of nutrition in which an organism produces their own food d.The type of nutrition in which an organism does not produce its own food