TEST BANK FOR

MICROBIOLOGY AN

EVOLVING SCIENCE,

3RD EDITION, JOHN W.

FOSTER

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CHAPTER 1: Microbial Life: Origin and Discovery

MULTIPLE CHOICE

1. Viruses are:

a. infectious agents that infect multi-cellular organisms

b. noncellular particles that take over the metabolism of a cell to generate more virus

particles

c. pathogens that replicate in complex growth media

d. cellular particles that belong to the archaea domain

e. microbes that consist of lipid membrane enclosed genomes

ANS: B DIF: Easy REF: 1.1 TOP: I.A | I.B

MSC: Remembering

2. Analysis of DNA sequences reveals:

a. the ancient convergence of two cell types, i.e., prokaryotes and eukaryotes

b. prokaryotes and eukaryotes evolved from a common ancestral cell

c. that bacteria share common ancestor with archaea, but not with eukarya

d. prokaryotes are cells with a nucleus

e. the genome of Haemophilus influenzae has about 2 billion base pairs

ANS: B DIF: Easy REF: 1.1 TOP: I.A | I.B

MSC: Remembering

3. Which of these groups are considered to be microbes but NOT considered to be cells?

a. viruses d. protists

b. bacteria e. filamentous fungi

c. archaea

ANS: A DIF: Easy REF: 1.1 TOP: I.A.i

MSC: Remembering

4. A microbe is commonly defined as:

a. a virus that requires a microscope to be seen

b. a bacterium that requires a microscope to be seen

c. a single-cellular prokaryote that requires a microscope to be seen

d. a multicellular eukaryote that requires a microscope to be seen

e. a living organism that requires a microscope to be seen

ANS: E DIF: Easy REF: 1.1 TOP: I.A.i | I.A.ii

MSC: Remembering

5. Which one of the following statements regarding microbial cells is NOT true?

a. Microbial cells acquire food, gain energy to build themselves, and respond to

environmental change.

b. Most single-celled organisms require a microscope to render them visible, but some

bacterial cells are large enough to be seen with naked eyes.

c. Microbes function as individual entities.

d. Many microbes form complex multicellular assemblages.

e. Viruses are not considered as microbial cells.

ANS: C DIF: Easy REF: 1.1 TOP: I.A.i | I.A.ii

MSC: Remembering

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