Brock Biology of Microorganisms
Chapter 2 Exam Questions & Answers
(Grade A+)
morphology -
correct answer ✅cell shape
coccus -
correct answer ✅spherical or ovoid shape
bacillus -
correct answer ✅rod or cylindrical shape
spirillum -
correct answer ✅curved or spiral shape
spirochetes -
correct answer ✅tightly coiled shape, appendaged bacteria, and
filamentous bacteria (includes budding bacteria)
size range for most prokaryotes -
correct answer ✅-0.2-->700 micrometers in diameter
-largest is Thiomargarita namibiensis
,Brock Biology of Microorganisms
Chapter 2 Exam Questions & Answers
(Grade A+)
size range for eukaryotes -
correct answer ✅-2->>600 micrometers in diameter
advantages to being small -
correct answer ✅-larger surface area to cell volume ratio
-grow faster
-evolve faster
ultramicrobacteria -
correct answer ✅bacteria between 0.2-0.4 micrometers in
diameter with highly streamlined genomes
bacterial cytoplasmic membrane -
correct answer ✅-membrane that is more like a matrix instead of a
completely fixed structure (very fluid/dynamic)
-have phospholipid bilayer w/proteins
hopanoids -
correct answer ✅sterol-like molecules that help strengthen some
bacterial cell walls
, Brock Biology of Microorganisms
Chapter 2 Exam Questions & Answers
(Grade A+)
archaeal membranes -
correct answer ✅-have ether linkages in phospholipids of archaea
(in contrast to ester links)
-lipids have isoprenes, not fatty acids
-some only have monolayer if lipids (not bilayer, especially in
thermophilic)
bacterial cell walls -
correct answer ✅-these walls have peptidoglycan
mycoplasms -
correct answer ✅pathogenic bacteria related to gram-positive
bacteria, but do not have cell walls
thermoplasmas -
correct answer ✅archaea that do not have cell walls
archaeal cell walls -
correct answer ✅-these walls do not have peptidoglycan
Chapter 2 Exam Questions & Answers
(Grade A+)
morphology -
correct answer ✅cell shape
coccus -
correct answer ✅spherical or ovoid shape
bacillus -
correct answer ✅rod or cylindrical shape
spirillum -
correct answer ✅curved or spiral shape
spirochetes -
correct answer ✅tightly coiled shape, appendaged bacteria, and
filamentous bacteria (includes budding bacteria)
size range for most prokaryotes -
correct answer ✅-0.2-->700 micrometers in diameter
-largest is Thiomargarita namibiensis
,Brock Biology of Microorganisms
Chapter 2 Exam Questions & Answers
(Grade A+)
size range for eukaryotes -
correct answer ✅-2->>600 micrometers in diameter
advantages to being small -
correct answer ✅-larger surface area to cell volume ratio
-grow faster
-evolve faster
ultramicrobacteria -
correct answer ✅bacteria between 0.2-0.4 micrometers in
diameter with highly streamlined genomes
bacterial cytoplasmic membrane -
correct answer ✅-membrane that is more like a matrix instead of a
completely fixed structure (very fluid/dynamic)
-have phospholipid bilayer w/proteins
hopanoids -
correct answer ✅sterol-like molecules that help strengthen some
bacterial cell walls
, Brock Biology of Microorganisms
Chapter 2 Exam Questions & Answers
(Grade A+)
archaeal membranes -
correct answer ✅-have ether linkages in phospholipids of archaea
(in contrast to ester links)
-lipids have isoprenes, not fatty acids
-some only have monolayer if lipids (not bilayer, especially in
thermophilic)
bacterial cell walls -
correct answer ✅-these walls have peptidoglycan
mycoplasms -
correct answer ✅pathogenic bacteria related to gram-positive
bacteria, but do not have cell walls
thermoplasmas -
correct answer ✅archaea that do not have cell walls
archaeal cell walls -
correct answer ✅-these walls do not have peptidoglycan
