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Name______________________________ Class __________________ Date ______________
Matching On the lines provided, match the term with its definition.
1. cell
2. cell membrane
3. cell wall
4. nucleus
5. cytoplasm
6. prokaryote
7. eukaryote
8. organelle
9. chromatin
10. phagocytosis
Multiple Choice On the lines provided, write the letter that best completesthe sentence or answers the question.
11. The small dense region in the nucleus where the assembly ofribosomes begins is called thea. nucleolus. b. nuclear envelope.c. chloroplast. d. vacuole.
12. The network of protein filaments that help maintain the shapeof the cell is called thea. nucleus. b. mitochondrion.c. cytoskeleton. d. ribosomes.
13. Which organelles can use energy from sunlight to createenergy-rich food molecules?a. lysosomes b. Golgi apparatic. vacuoles d. chloropasts
14. What is the process by which material is taken into the cell byinfoldings of the cell membrane?a. diffusion b. endocytosisc. osmosis d. exocytosis
15. The fourth, and highest, level of organization in amulticellular organism isa. cell specialization. b. a tissue.c. an organ system. d. an organ.
Chapter 7 Cell Structure and Function Chapter Vocabulary Review
a. organism whose cells contain a nucleus
b. granular material visible within the nucleus
c. the basic unit of life
d. specialized structures within a cell that perform importantcell functions
e. organism whose cells do not contain a nucleus
f. strong supporting layer around the cell membrane thatprotects the cell
g. process by which extensions of cytoplasm engulf largeparticles
h. large structure that contains the cell’s genetic information
i. thin, flexible barrier around the cell
j. portion of the cell outside the nucleus
Bio07_TR_U03_CH07.QXD 4/25/06 2:50 PM Page 35
Name______________________________ Class __________________ Date ______________
Labeling Diagrams On the lines provided, label the structures found in ananimal cell that correspond with the numbers in the diagram.
16.
17.
18.
19.
Completion On the lines provided, complete the following sentences.
20. The distinct, threadlike structures that contain the genetic
information of the cell are called .
21. Particles tend to move from an area of high concentration to an
area of low concentration in a process known as .
22. The double-layered sheet that makes up nearly all cell membranes
is called the .
23. The process in which water diffuses through a selectively permeablemembrane is called .
24. The process by which a protein channel allows molecules to cross thecell membrane is called .
25. The process that requires an input of energy to help material movefrom an area of lower concentration to an area of greaterconcentration is called .
Nucleolus
Cell membraneNuclear envelope
17.
18.
Nucleus
Ribosome (attached)
16.
Centrioles
19.
Bio07_TR_U03_CH07.QXD 4/25/06 2:50 PM Page 36
Name______________________________ Class __________________ Date ______________
Organelle FunctionAn organelle is a specialized cell structure. Each organelle func-tions in a different way to help the cell carry out life processes.A mitochondrion, nucleus, endoplasmic reticulum, and Golgiapparatus are pictured and described below. Write the name of theorganelle underneath its picture.
Use the table to answer the question.1. Which of the structures shown above contains a nucleolus?
Organelle Function
controls most cell processes and stores genetic material
makes membrane lipids that will be exported out of the cell
modifies, sorts, and packages materials from the endoplasmic reticulum
converts the energy stored in food into a more useable form
Bio07_TR_U03_CH07.QXD 4/25/06 2:50 PM Page 11
Name______________________________ Class __________________ Date ______________
Organelle FunctionAn organelle is a specialized cell structure. Each organelle func-tions in a different way to help the cell carry out life processes.A mitochondrion, nucleus, endoplasmic reticulum, and Golgiapparatus are pictured and described below. Write the name of theorganelle underneath its picture.
Use the table to answer the question.1. Which of the structures shown above contains a nucleolus?
Organelle Function
controls most cell processes and stores genetic material
makes membrane lipids that will be exported out of the cell
modifies, sorts, and packages materials from the endoplasmic reticulum
converts the energy stored in food into a more useable form
Bio07_TR_U03_CH07.QXD 4/25/06 2:50 PM Page 11
Name______________________________ Class __________________ Date ______________
Cell MembranesThe cell membrane controls what enters and leaves the cell. Most cell membranes are made up of a phospholipid bilayer. This bilayer usually contains membrane proteins embedded in it.Draw a diagram of a portion of a cell membrane. Label the cytoplasmand the area outside the cell. A sample phosolipid and membraneprotein have been diagrammed for you.
Answer the question.1. What do the carbohydrate chains on some membrane
proteins do?
phospholipid
membrane protein
carbohydratechain
Bio07_TR_U03_CH07.QXD 4/25/06 2:50 PM Page 12
Name______________________________ Class __________________ Date ______________
Diffusion and OsmosisDiffusion is the movement of particles from an area of high con-centration to an area of low concentration. Osmosis is the diffusionof water through a selectively permeable membrane.Look at the beakers on the left. In the beakers on the right, draw in anychanges in water level or number of solute particles on each side of themembrane that occur as a result of the described process.
Use the diagrams to answer the question. 1. Look at the top left beaker. What would happen if the mem-
brane did not allow water or solute particles to pass through it?
membrane
water
solute particles
Osmosis
water movement
Diffusionof
SoluteParticles
solute particle movement
Bio07_TR_U03_CH07.QXD 4/25/06 2:50 PM Page 13
Name______________________________ Class __________________ Date ______________
Facilitated Diffusion and Active TransportFacilitated diffusion occurs when a substance diffuses across the cell membrane through a protein channel. Active transportoccurs when the cell uses energy to carry a substance across thecell membrane.Look at the diagrams. Label each as either facilitated diffusion oractive transport.
Use the diagram to answer the questions.1. Which process can move molecules from a lower concentration
solution on one side of the membrane to a higher concentrationsolution on the other side?