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Biology: The Unity and Diversity of Life

Cecie Starr, Ralph Taggart, Christine Evers

Chapter 20

Viruses, Bacteria, and Archaea - all with Video Answers

Educators

Chapter Questions

01:06

Problem 1

DNA or RNA may be the genetic material of ______.
a. a bacterium
b. a viroid
c. a virus
d. an archaeon

Sabihah Khan
Sabihah Khan
Numerade Educator
00:37

Problem 2

A viroid consists entirely of ______.
a. DNA
b. RNA
c. protein
d. lipids

Sabihah Khan
Sabihah Khan
Numerade Educator
01:07

Problem 3

Bacteriophages can kill their host quickly by ______.
a. binary fission
b. a lytic pathway
c. a lysogenic pathway
d. both b and c

Sabihah Khan
Sabihah Khan
Numerade Educator
00:33

Problem 4

The genetic material of HIV is ______.
a. DNA
b. RNA
c. protein
d. lipids

Sabihah Khan
Sabihah Khan
Numerade Educator
01:24

Problem 5

______ do not reproduce sexually.
a. Eukaryotes
b. Bacteria
c. Archea
d. $b$ and $c$

Sabihah Khan
Sabihah Khan
Numerade Educator
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
Numerade Educator
01:12

Problem 7

All ______ are oxygen-releasing photoautotrophs.
a. spirochetes
b. chlamydias
c. cyanobacteria
d. proteobacteria

Sabihah Khan
Sabihah Khan
Numerade Educator
01:00

Problem 8

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

Sabihah Khan
Sabihah Khan
Numerade Educator
01:06

Problem 9

Some ______ can cause cancer in humans.
a. viruses
b. bacteria
c. viroids
d. a and b

Sabihah Khan
Sabihah Khan
Numerade Educator
01:08

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
Numerade Educator
00:50

Problem 11

______ reproduce by binary fission.
a. Viruses
b. Archaea
c. Bacteria
d. both b and c

Sabihah Khan
Sabihah Khan
Numerade Educator
00:48

Problem 12

A plasmid is a circle of ______.
a. $\mathrm{RNA}$
b. DNA
c. either RNA or DNA

Sabihah Khan
Sabihah Khan
Numerade Educator
00:48

Problem 13

Which of these diseases is caused by bacteria?
a. flu
b. AIDS
c. measles
d. syphilis

Sabihah Khan
Sabihah Khan
Numerade Educator
02:32

Problem 14

A worldwide outbreak of a disease is $a(n)$ ______.

Eric Goldman
Eric Goldman
Numerade Educator
02:38

Problem 15

Match the terms with their most suitable description.
_____ methanogen
_____ nucleoid
_____ retrovirus
_____ plasmid
_____ extreme halophile
_____ viroid
_____ sex pilus

a. infectious RNA
b. has RNA genome, protein coat
c. draws cells together
d. releases methane gas
e. region with DNA
f. circle of nonchromosomal DNA
g. salt lover

Ramesh Singh
Ramesh Singh
Numerade Educator