Life Science

Chapter 7: Bacteria

Standardized Test Practice

1.
What is the purpose of the flagellum?

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A)movement
B)conjugation
C)fission
D)nitrogen fixing
2.
What shape is the bacterial cell in the diagram?

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A)coccus
B)spirillum
C)spherical
D)bacillus
3.
Bacteria reproduce by a process called

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A)budding
B)fission.
C)meiosis.
D)fusion
4.
What function does a thick, gelatinlike capsule serve in a bacterium?
A)It protects the bacterium from other cells that try to destroy it.
B)It allows the bacterium to exchange genetic material with other bacteria.
C)It encloses the bacterium's genetic material.
D)It enables a bacterium to exist for many years until growth is favorable.
5.
Which of the following is an example of an archaebacterium?
A)cyanobacteria
B)anaerobic methane producer
C)eubacteria
D)nitrogen-fixing bacteria
6.
Which of these bacteria is pathogenic?
A)bacteria that use dead organisms as food
B)bacteria that live in the nodules of plants and fix nitrogen
C)bacteria that cause strep throat
D)bacteria used to make yogurt
7.
Which of the following is not a way to prevent diseases that are caused by bacteria?
A)putting bacteria in endospores
B)getting vaccines that are effective against bacterial diseases
C)pasteurizing food that contains bacteria
D)using antiseptics in bathrooms and kitchens
8.
What color do Gram-negative bacteria stain when treated with Gram's stain?
A)blue
B)purple
C)red
D)pink
9.
Which food is made using bacteria?
A)cheese
B)eggs
C)fruit juice
D)milk
10.
What is the end result of a bloom?
A)Cyanobacteria in the pond thrive.
B)Oxygen levels in the pond increase.
C)Many fish in the pond die.
D)Many animals in the pond increase in population.
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