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Biology : The Unity and Diversity of Life

Cecie Starr, Christine A. Evers; Lisa Starr

Chapter 20

Viruses, Bacteria, and Archaea - all with Video Answers

Educators

Chapter Questions

01:29

Problem 1

The genome of ___________ can be either RNA or DNA.
a. a bacterium
b. a eukaryote
c. a virus
d. an archaeon

Ramesh Singh
Ramesh Singh
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01:07

Problem 2

The capsid of a virion consists of__________ .
a. DNA
b. RNA
c. protein
d. lipids

Ramesh Singh
Ramesh Singh
Numerade Educator
01:35

Problem 3

Bacteriophages kill their host quickly by __________ .
a. binary fission
b. a lytic pathway
c. a lysogenic pathway
d. transformation

Ramesh Singh
Ramesh Singh
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01:19

Problem 4

The genetic material of HIV (a retrovirus) is __________ .
a. DNA
b. RNA
c. protein
d. lipids

Ramesh Singh
Ramesh Singh
Numerade Educator
01:34

Problem 5

Bacteria and archaea reproduce by Bacteria and archaea reproduce by
a. binary fission
b. transformation
c. conjugation
d. the lytic pathway

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Ramesh Singh
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01:21

Problem 6

One cell transfers a plasmid to another by __________ .
a. binary fission
b. transformation
c. conjugation
d. the lytic pathway

Sabihah Khan
Sabihah Khan
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01:21

Problem 7

__________ carry out oxygen-releasing photosynthesis.
a. Spirochetes
b. Chlamydias
c. Cyanobacteria
d. Proteobacteria a

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Ramesh Singh
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01:00

Problem 8

Bacteria that serve as decomposers are __________ .
a. photoautotrophs
b. photoheterotrophs
c. chemoautotrophs
d. chemoheterotrophs

Sabihah Khan
Sabihah Khan
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01:24

Problem 9

New flu strains can arise by__________ .
a. meiosis
b. mitosis
c. viral reassortment
d. binary fission

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Ramesh Singh
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00:54

Problem 10

Formation of a(n)__________ allows some soil bacteria to
survive adverse conditions.
a. pilus
b. nucleoid
c. endospore
d. plasmid

Sabihah Khan
Sabihah Khan
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01:28

Problem 11

__________ in the stomach of a cow release methane.
a. Bacteria
c. Aerobes
b. Archaea
d. Viruses

Ramesh Singh
Ramesh Singh
Numerade Educator
01:29

Problem 12

A plasmid is a circle of A plasmid is a circle of
a. RNA
b. DNA
c. either RNA or DNA
d histone proteins
a. RNA
c. either RNA or DNA
b. DNA
d histone proteins

Ramesh Singh
Ramesh Singh
Numerade Educator
01:24

Problem 13

A bacterial exotoxin is a __________ .
a. membrane lipid
b. membrane protein
c. secreted protein
d. cell wall component

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Ramesh Singh
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01:25

Problem 14

Both archaea and eukaryotes have
a. peptidoglycan
b. histone proteins
c. a nucleus
d. a capsid

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Ramesh Singh
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02:38

Problem 15

Match the terms with their most suitable description.
_____ methanogen
_____ nucleoid
_____ retrovirus
_____ plasmid
_____ extreme
halophile
_____ peptidoglycan
_____ penicillin
a. component of bacterial cell wall
b. has RNA genome, protein coat
c. halts cell wall formation
d. releases methane gas
e. region with DNA
f. circle of nonchromosomal DNA
g. salt lover

Ramesh Singh
Ramesh Singh
Numerade Educator