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ANSWER KEY
Ws 1.6
Parts of a Cell Seen with an Electron Microscope p. 19
1. What does the cytoplasm contain?
Tiny structures called organelles
2. Define organelle.
Tiny structures inside the cell
3. Fg.1 shows?
Animal cell
4. What is a mitochondrion often called?
Power plant for cells
5. What is its function?
provide energy for the cell by undergoing cellular respiration
6. Define cellular respiration.
Mitochondria release energy by combining sugar molecules with oxygen molecules to form carbon dioxide and water.
7. Fg. 2 shows?
Mitochondria
8. How large are ribosomes?
So small they appear as small fuzzy dots
9. What do ribosomes do?
Produces proteins
10. What are proteins needed for?
Cell growth, repair and reproduction
11. What is an endoplasmic reticulum?
Series of folded membranes
12. What is a rough endoplasmic reticulum?
Ribosomes are attached to the E.R.
13. What is a smooth endoplasmic reticulum?
No ribosomes attached
14. Give the function of the smooth endoplasmic reticulum.
Is the structure where lipids are made
15. What is the common function of both the smooth and rough endoplasmic reticulum?
Carry materials through the cytoplasm
16. Fg3a shows?
Rough ER
17. Fg 3b shows?
Smooth ER
18. What does the Golgi apparatus look like?
Stacks of flattened balloons
19. What is this organelles main function?
Stores proteins and puts them into packages
20. Define vesicle.
Packages / bags that carry protein molecules
21. Fg 4. What is occurring?
Vesicles containing packages of protein are being released to the outside of the cell
22. What makes lysosomes?
Special enzymes
23. What do they do?
Job is to break down large molecules into many smaller molecules that can be used by the cell
24. Fg 5 shows?
Lysosomes destroying damaged and worn-out cells
25. Why are lysosomes called the “cell’s recyclers”?
It recycles damaged or worn-out cells
26. In humans and other animals, what role do lysosomes play?
It destroys harmful substances and invading bacteria that enter the cell
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