Question 1

Methanogens may contribute to the greenhouse effect and global warming due to methane production.

Accepted Answer

A) True 
 B)False  True

Question 2

Archaeons are not known to incorporate (fix)carbon dioxide.

Accepted Answer

A) True 
 B)False  False

Question 3

Some methanogenic Archaea are capable of fixing nitrogen.

Accepted Answer

A) True 
 B)False  True

Question 4

Methanogens link ATP synthesis to methanogenesis by

Accepted Answer

A) substrate-level phosphorylation. 
B) the reverse TCA cycle. 
C) the use of bacteriorhodopsin. 
D) electron transport to generate proton motive force. 
A) substrate-level phosphorylation. 
B) the reverse TCA cycle. 
C) the use of bacteriorhodopsin. 
D) electron transport to generate proton motive force.

Question 5

Which of the following is not true about archaeal ribosomes?

Accepted Answer

A) They are 70S like bacterial ribosomes. 
B) They may possess ribosome binding sites homologous to bacterial Shine-Dalgarno sequences. 
C) They have similar antibiotic sensitivities to those of bacteria. 
D) All of these are true about archaeal ribosomes. 
A) They are 70S like bacterial ribosomes. 
B) They may possess ribosome binding sites homologous to bacterial Shine-Dalgarno sequences. 
C) They have similar antibiotic sensitivities to those of bacteria. 
D) All of these are true about archaeal ribosomes.

Question 6

Picrophilus has a pH optimum below 1 and can even grow at or near pH 0.

Accepted Answer

A) True 
 B)False

Question 7

A peptidoglycan-like polymer found in the cell walls of some Archaea is called __________.

Accepted Answer

The answer of A peptidoglycan-like polymer found in the cell...

Question 8

Most archaeal mRNAs like those of eukaryotes are spliced.

Accepted Answer

A) True 
 B)False

Question 9

Because archaeons lack peptidoglycan in their cell walls

Accepted Answer

A) some have an outer layer of complex polysaccharide. 
B) some have an outer layer of protein. 
C) they must always be grown in isotonic medium. 
D) some have an outer layer of complex polysaccharide and some have an outer layer of protein 
A) some have an outer layer of complex polysaccharide. 
B) some have an outer layer of protein. 
C) they must always be grown in isotonic medium. 
D) some have an outer layer of complex polysaccharide and some have an outer layer of protein

Question 10

An organism with a temperature growth optimum near 80$\degree$C and a pH growth optimum between 2 and 3 is usually referred to as a(n)

Accepted Answer

A) halophile. 
B) thermoacidophile. 
C) thermophile. 
D) thermoalkalophile. 
A) halophile. 
B) thermoacidophile. 
C) thermophile. 
D) thermoalkalophile.

Question 11

Archaeal membranes contain which of the following lipids?

Accepted Answer

A) phospholipids 
B) sulfolipids 
C) glycolipids 
D) all of these 
A) phospholipids 
B) sulfolipids 
C) glycolipids 
D) all of these

Question 12

Some members of the Archaea lack a cell wall.

Accepted Answer

A) True 
 B)False

Question 13

Methanogenic Archaea are

Accepted Answer

A) obligate anaerobes that produce methane. 
B) obligate anaerobes that consume methane. 
C) obligate aerobes that produce methane. 
D) obligate aerobes that consume methane. 
A) obligate anaerobes that produce methane. 
B) obligate anaerobes that consume methane. 
C) obligate aerobes that produce methane. 
D) obligate aerobes that consume methane.

Question 14

The photosynthetic membrane of Halobacterium salinarium contains

Accepted Answer

A) bacteriorhodopsin. 
B) chlorophyll a and b. 
C) bacteriochlorophyll. 
D) archaeochlorophyll. 
A) bacteriorhodopsin. 
B) chlorophyll a and b. 
C) bacteriochlorophyll. 
D) archaeochlorophyll.

Question 15

The cell membranes of wall-less archaeons are strengthened by

Accepted Answer

A) diglycerol ethers. 
B) glycoprotein or protein layers. 
C) pseudomurein. 
D) diglycerol tetraethers. 
A) diglycerol ethers. 
B) glycoprotein or protein layers. 
C) pseudomurein. 
D) diglycerol tetraethers.

Question 16

The DNA of some archaeons is stabilized by association with archaeal histone proteins forming particles resembling eucaryotic nucleosomes.

Accepted Answer

A) True 
 B)False

Question 17

Glycogen is used as a major carbon and energy reserve by some archaeons.

Accepted Answer

A) True 
 B)False

Question 18

Archaeal sulfate reducers use elemental sulfur as an electron acceptor.

Accepted Answer

A) True 
 B)False

Question 19

The Archaea do not use __________ as a mechanism for reproduction.

Accepted Answer

A) binary fission 
B) budding 
C) mitosis 
D) fragmentation 
A) binary fission 
B) budding 
C) mitosis 
D) fragmentation

Question 20

Many species in the phylum Crenarchaeota are considered extreme thermophiles or ________________,which can grow at temperatures above 100 degrees
C.

Accepted Answer

The answer of Many species in the phylum Crenarchaeota are...

Exam 20: The Archaea

Methanogens may contribute to the greenhouse effect and global warming due to methane production.

Archaeons are not known to incorporate (fix)carbon dioxide.

Some methanogenic Archaea are capable of fixing nitrogen.

Methanogens link ATP synthesis to methanogenesis by

Which of the following is not true about archaeal ribosomes?

Picrophilus has a pH optimum below 1 and can even grow at or near pH 0.

A peptidoglycan-like polymer found in the cell walls of some Archaea is called __________.

Most archaeal mRNAs like those of eukaryotes are spliced.

Because archaeons lack peptidoglycan in their cell walls

An organism with a temperature growth optimum near 80 °\degree° C and a pH growth optimum between 2 and 3 is usually referred to as a(n)

Archaeal membranes contain which of the following lipids?

Some members of the Archaea lack a cell wall.

Methanogenic Archaea are

The photosynthetic membrane of Halobacterium salinarium contains

The cell membranes of wall-less archaeons are strengthened by

The DNA of some archaeons is stabilized by association with archaeal histone proteins forming particles resembling eucaryotic nucleosomes.

Glycogen is used as a major carbon and energy reserve by some archaeons.

Archaeal sulfate reducers use elemental sulfur as an electron acceptor.

The Archaea do not use __________ as a mechanism for reproduction.

Many species in the phylum Crenarchaeota are considered extreme thermophiles or ________________,which can grow at temperatures above 100 degrees C.

The Evolution of Microorganisms and Microbiology

Microscopy

Bacterial Cell Structure

Archaeal Cell Structure

Eukaryotic Cell Structure

Viruses and Other Acellular Infectious Agents

Microbial Growth

Control of Microorganisms in the Environment

Antimicrobial Chemotherapy

Introduction to Metabolism

Catabolism: Energy Release and Conservation

Anabolism: the Use of Energy in Biosynthesis

Bacterial Genome Replication and Expression

Regulation of Bacterial Cellular Processes

Eukaryotic and Archaeal Genome Replication and Expression

Mechanisms of Genetic Variation

Recombinant Dna Technology

Microbial Genomics

Microbial Taxonomy and the Evolution of Diversity

The Deinococci,mollicutes,and Nonproteobacterial Gram-Negative Bacteria

The Proteobacteria

Firmicutes: the Low G 1 C Gram-Positive Bacteria

Actinobacteria: the High G 1 C Gram-Positive Bacteria

The Protists

The Fungi Eumycota

Viruses

Biogeochemical Cycling and Global Climate Change

Methods in Microbial Ecology

Microorganisms in Marine and Freshwater Ecosystems

Microorganisms in Terrestrial Ecosystems

Microbial Interactions

Innate Host Resistance

Adaptive Immunity

Pathogenicity and Infection

Clinical Microbiology and Immunology

Epidemiology and Public Health Microbiology

Human Diseases Caused by Viruses and Prions

Human Diseases Caused by Bacteria

Human Diseases Caused by Fungi and Protists

Microbiology of Food

Biotechnology and Industrial Microbiology

Applied Environmental Microbiology

Filters

An organism with a temperature growth optimum near 80 $\degree$ C and a pH growth optimum between 2 and 3 is usually referred to as a(n)