Download Cells Test

CH 7 Cells Test: Form A
Multiple Choice. Identify the choice that best completes the statement or answers the question.
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1. Which of the following is NOT a principle of the cell theory?
a. Cells are the basic units of life.
b. All living things are made of cells.
c. Very few cells reproduce.
d. All cells are produced by existing cells.
2. The cell theory applies to all of the following EXCEPT
a. bacteria.
c. multicellular organisms.
b. plants and animals.
d. proteins.
3. Which of the following structures is NOT found in bacteria?
a. cytoplasm.
c. nuclear membrane.
b. a cell membrane.
d. genetic material.
4. Which of the following contain a nucleus?
a. prokaryotes
c. eukaryotes
b. bacteria
d. organelles
5. A cell from a heart muscle would probably have an unusually high proportion of
a. lysosomes.
c. mRNA.
b. mitochondria.
d. Golgi bodies.
6. Which of the following organisms are prokaryotes?
a. plants
c. bacteria
b. animals
d. all of the above
7. Which of the following is a function of the nucleus?
a. stores DNA
b. controls most of the cell’s processes
c. contains the information needed to make proteins
d. all of the above
8. Which of the following is NOT found in the nucleus?
a. cytoplasm
c. chromatin
b. nucleolus
d. DNA
9. Which of the following statements explains why the nucleus is important to cells?
a. Only eukaryotes have nuclei.
b. Only prokaryotes have nuclei.
c. The nucleus contains coded instructions for making proteins.
d. The nucleus is surrounded by a nuclear envelope.
10. Which of the following structures can be found in the cytoplasm?
a. nucleolus
c. chromatin
b. ribosome
d. cell wall
11. Which organelle contains enzymes to break down and recycle materials and remove waste from the cell?
a. Golgi apparatus
c. endoplasmic reticulum
b. lysosome
d. mitochondrion
12. Which structure synthesizes proteins using coded instructions that come from the nucleus?
a. Golgi apparatus
c. vacuole
b. mitochondrion
d. ribosome
13. Which organelle converts the chemical energy stored in food into a form that cells can use (ATP)?
a. chloroplast
c. endoplasmic reticulum
b. Golgi apparatus
d. mitochondrion
14. Which organelles help provide cells with energy?
a. mitochondria and chloroplasts
c. smooth endoplasmic reticulum
b. rough endoplasmic reticulum
d. Golgi apparatus and ribosomes
____ 15. Which sequence correctly traces the path of a protein in the cell?
a. ribosome, rough endoplasmic reticulum, Golgi apparatus, released from the cell
b. ribosome, smooth endoplasmic reticulum, chloroplast
c. smooth endoplasmic reticulum, ribosome, Golgi apparatus, released from cell
d. mitochondria, rough endoplasmic reticulum, cell membrane
____ 16. Which organelle would you expect to find in plant cells but not animal cells?
a. mitochondrion
c. chloroplast
b. ribosome
d. smooth endoplasmic reticulum
____ 17. Which of the following is NOT a function of the endoplasmic reticulum?
a. cellular digestion
c. synthesize membrane lipids
b. detoxification
d. synthesize proteins
____ 18. Which structures carry out cell movement (locomotion)?
a. cytoplasm and ribosomes
c. cilia and flagella
b. nucleolus and nucleus
d. chromosomes
____ 19. Which of the following is NOT a function of the cytoskeleton?
a. helps the cell maintain its shape
b. helps the cell break down materials
c. enables the cell to move (locomotion)
d. helps organize cell division
____ 20. The main function of the cell wall is to
a. support and protect the cell.
c. direct the activities of the cell.
b. store DNA.
d. help the cell move.
____ 21. Unlike the cell membrane, the cell wall is
a. found in all organisms.
c. a flexible barrier.
b. composed of a lipid bilayer.
d. usually made of tough fibers (e.g., cellulose).
____ 22. You will NOT find a cell wall in which of these kinds of organisms?
a. plants
c. fungi
b. animals
d. bacteria
____ 23. Which of the following structures serves as the cell’s boundary from its environment?
a. mitochondrion
c. chloroplast
b. cell membrane
d. channel proteins
____ 24. Which of the following is a function of the cell membrane?
a. breaks down lipids, carbohydrates, and proteins from foods
b. stores water, salt, proteins, and carbohydrates
c. keeps the cell wall in place
d. regulates which materials enter and leave the cell
____ 25. The cell membrane contains channels and pumps that help move materials from one side to the other. What
are these channels and pumps made of?
a. carbohydrates
c. bilipids
b. lipids
d. proteins
____ 26. Diffusion is the movement of molecules from
a. an area of low concentration to an area of high concentration.
b. an area of high concentration to an area of low concentration.
c. an area of equilibrium to an area of high concentration.
d. all of the above
____ 27. Diffusion occurs when
a. molecules are higher on one side of the membrane.
b. the concentration of a solutes is equal throughout a solution.
c. the concentration of water is equal throughout a solution.
d. molecules use energy to cross the membrane.
____ 28. What will happen to a red blood cell that is surrounded by a hypotonic solution like fresh water?
a. water will move into the cell causing it to swell and possibly burst (hemolysis).
b. water will move out of the cell causing it to become dehydrated and shrivel (crenation).
c. solutes will move into the cell.
d. solutes will move out of the cell.
____ 29. Which means of particle transport requires input of energy from the cell?
a. diffusion
c. facilitated diffusion
b. osmosis
d. active transport
____ 30. The diffusion of water across a selectively permeable membrane is called
a. filtration.
c. facilitated diffusion.
b. osmosis.
d. active transport.
____ 31. When the concentration of molecules on both sides of a membrane is the same, the system has reached
a. exocytosis
c. equilibrium.
b. endocytosis
d. permeability.
____ 32. A form of active transport by which materials are taken into the cell from the outside is called
a. exocytosis.
c. endocytosis.
b. osmosis.
d. facilitated diffusion.
____ 33. The cell membrane of a red blood cell allows water, oxygen, carbon dioxide, and glucose to pass through.
Because other substances are blocked from entering, this membrane is called
a. perforated.
c. permeable.
b. selectively permeable.
d. non-conductive.
____ 34. The plasma membrane of a cell consists of
a. proteins arranged in two layers with polar areas forming the outside of the membrane.
b. two layers of lipids organized with the nonpolar (hydrophobic) tails forming the interior of the membrane.
c. lipid molecules positioned between two carbohydrate layers..
d. protein molecules with polar and nonpolar tails..
True/False
Indicate whether the statement is true or false. Mark “A” if the statement is true and “B” if the statement is false..
Figure 7–1
____ 35. The cell represented in Figure 7–2 is a eukaryote.
____ 36. Chromatin are found in the cytoplasm of the cell.
____ 37. Ribosomes stud the surface of rough endoplasmic reticulum.
____ 38. Structure F in Figure 7-1 is the vacuole for water storage.
____ 39. The cell wall is represented by structure A in Figure 7-1.
____ 40. The cytoplasm regulates which substances enter and leave a cell.
Figure 7–2
____ 41. Equilibrium is when there is balance on both sides of a membrane.
____ 42. A red blood cell is an example of a prokaryotic cell.
____ 43. Unicellular organisms are more complex that multicellular organisms.
____ 44. Letter D in Figure 7-2 represents the mitochondria.
____ 45. Facilitated diffusion does NOT require energy from the cell.
____ 46. The structure indicated in Figure 7–2 by the letter F is DNA.