Ch 7 Review
1. Bacteriophages are viruses that attack and destroy
a. Other viruses
b. Bacteria
c. Plants
d. Humans
2. Which part of a virus determines which host cells it can infect?
a. Nucleus
b. Ribosomes
c. Flagellum
d. Surface proteins
3. Most bacteria are surrounded by a rigid protective structure called the
a. Cell wall
b. Cell membrane
c. Protein coat
d. Flagellum
4. Which of the following characteristics describes all protists?
a. They are unicellular
b. They can be seen with the unaided eye
c. Their cells have nuclei
d. They are unable to move on their own
5. A lichen is a symbiotic association between
a. Fungi and plant roots
b. Algae and fungi
c. Algae and bacteria
d. Protozoans and algae
6. Active viruses enter a cell and immediately begin to multiply
a. True
b. False
7. During conjugation, one bacterium transfers genetic material to another bacterial cell
a. True
b. False
8. Plantlike protists are called protozoans
a. True
b. False
9. Bacteria form endospores to survive unfavorable conditions in their surroundings
a. True
b. False
10. Most fungi are made up of threadlike structures called spores
a. True
b. False
11. Which of the following statements about a paramecium is correct?
a. It has two contractile vacuoles that remove excess water from the cytoplasm
b. It uses cilia to move
c. It has two nuclei
d. All of the above
12. Which of the following statements about fungus reproduction is true?
a. Fungi reproduce sexually by budding
b. Fungi reproduce by making spores
c. Fungi reproduce asexually when two hyphae join together and exchange genetic
material
d. Fungi do not reproduce sexually
13. What will most likely happen after the virus in the diagram attaches to the bacterial
cell? (use the picture to help answer this question)
a. The virus will inject its proteins into the bacterial cell
b. The virus will inject its genetic material into the bacterial cell
c. The bacterial cell will inject its proteins into the virus
d. The bacterial cell will inject its genetic material into the virus
14. Which of the following statements about viruses is not true?
a. Viruses can multiply only inside a living cell
b. Viruses have genetic material
c. Virus particles are smaller than bacterial cells
d. Diseases caused by viruses can be cured by antibiotics
15. Paola grew a new culture of bacteria and measured the population’s growth over
time. The number of bacteria increased sharply over the first few hours but then
tapered off. Which of the following statements about these observations is true?
a. The initial conditions for bacterial growth were favorable
b. The number of bacteria increased as the bacteria reproduced asexually
c. After a period of time, the bacteria started to run out of food, space, and other
resources
d. All of the above
16. Compare and contrast viruses and bacteria with respect to their sizes, structures, and
methods of reproduction. _________________________________________________
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17. Give three real-life examples of ways bacteria can be helpful to humans
a.
b.
c.
18. Where is the genetic material located in a bacterial cell?
a. In the flagellum
b. In the cytoplasm
c. On the endospore
d. All the above
19. What is the role of flagella in a bacterial cell?
e. Make food
f. Fight disease
g. Help the bacterial cells move
h. Convert carbon dioxide to oxygen
20. What are three ways in which bacteria obtain food?
a.
b.
c.
21. What are the two types of ways that bacteria reproduce?
a.
b.
22. One cell divides to form two identical cells is called
a. Sexual reproduction
b. Conjugation
c. Binary fission
d. Asexual reproduction
23. One bacterium transfers some genetic material to another bacterium through
threadlike bridge
a. Sexual reproduction
b. Conjugation
c. Binary fission
d. Asexual reproduction
24. Is a small, rounded, thick-walled, resting cell that forms inside a bacterial cell
a. Conjugation
b. Binary fission
c. Cytoplasm
d. Endospore
25. Food that is heated to a temperature that is high enough to kill most harmful bacteria
without changing the taste of food is called
a. Pasteurization
b. Conjugation
c. Binary fission
d. Asexual reproduction
26. Organisms that break down large chemicals in dead organisms into small chemicals is
called
a. Pasteurization
b. Cytoplasm
c. Endospore
d. Decomposers
27. A friend states that all bacteria are harmful to people. List three reasons why this
statement is inaccurate.
a.
b.
28. Protists are eukaryotes that cannot be classified as animals, plants, or fungi?
a. True
b. False
29. Protozoan’s are multicellular
a. True
b. False
30. The word pseudopod means “false foot”
a. True
b. False
31. Amoebas and paramecium have a contractile vacuole that collects extra water and
then stores it for later use
a. True
b. False
32. Cilia are hair-like projections from cells that move with a wavelike motion
a. True
b. False
33. Symbiosis is a close relationship in which at least two of the species benefit
a. True
b. False
34. Like plants, algae are Heterotrophs
a. True
b. False
35. A spore is a tiny cell that is able to grow into a new organism
a. True
b. False
36. Like fungi, fungus-like protists are Heterotrophs, have cell walls, and use spores to
reproduce
a. True
b. False
37. Plant-like protists include: diatoms, dinoflagellates, eugleniods, red algae, green algae,
brown algae
a. True
b. False