MBIO 3401 Test 3 - TTU Jeter Exam
Questions & Answers (Grade A+)
lessons from genomics -
correct answer ✅1. organismal complexity not directly correlated
w/ genetic complexity
2. large number of open reading frames encode proteins w/o any
known function
3. far more horizontal gene transfer than expected between
prokaryotes (bacteria)
4. pathogenicity islands play important role in ability of bacteria to
cause disease (they have more genes)
5. parasitic bacteria that depend on their hosts for survival have
stream lined their genomes (lost a lot of their genes that allow
them to live on their own
species -
correct answer ✅a group of actually or potentially interbreeding
natural populations, which are reproductively isolated from other
such groups
traditional methods for classifying microbes -
correct answer ✅- morphology
-physiology
- ecology
,MBIO 3401 Test 3 - TTU Jeter Exam
Questions & Answers (Grade A+)
- medical importance
molecular methods for classifying microbes -
correct answer ✅- nucleic acid hybridization- isolate DNA from 2
bacteria and see if they can form hybrids
- protein electrophoresis
***- nucleic acid and protein sequencing- 16s rRNA from
prokaryotes and 18s rRNA from eukaryotes
7 types of Gram (-) bacteria -
correct answer ✅1. photosynthetic bacteria
2. chemolithotrophs
3. Spirilla
4. Myxobacteria
5. Bacterial bioluminescence
6. Spirochete
7. Rickettsias and Chlamydias
How are Gram (+) bacteria phyla based on -
correct answer ✅low G+C or high G+C
,MBIO 3401 Test 3 - TTU Jeter Exam
Questions & Answers (Grade A+)
low G+C Gram (+) bacteria phyla -
correct answer ✅1. Firmicutes
2. Tenericutes
high G+C Gram (+) bacteria phyla -
correct answer ✅1. phylum Actinobacteria
metagenomics -
correct answer ✅pooled dna or rna from environment sample
containing organisms that have not been isolated before
how does concept of species differ between prokaryotes and
eukaryotes? -
correct answer ✅species- a group of actually or potentiall
interbreeding natural populations, which are reproductively
isolated from other such groups
-eukaryotes do sexual reproduction & prokaryotes do not
- prokaryotes used to be differentiated by things like morphology,
physiology, and ecology
what molecular technique is most widely used today to distinguish
evolutionary lineages of microorganisms and how does it differ
, MBIO 3401 Test 3 - TTU Jeter Exam
Questions & Answers (Grade A+)
from more traditional methods? -
correct answer ✅- nucleic acid and protein sequencing (16SrRNA
vs 18SrRNA)
- used to be by morphology, physiology, ecology & medical
importance
What are the 3 domains of life? -
correct answer ✅Bacteria, Archaea, Eukarya
what is the most widely accepted scheme for the major lines of cell
descent during the history of life on Earth? -
correct answer ✅Progenote
-then led to LUCA which split to ancestral archea, urkaryotes, &
ancestral bacteria
-these led to modern archea, eukaryotes, & modern bacteria
-mitochondria and chloroplasts led to eukaryotes (previously in
bacteria)
Stromatolites -
correct answer ✅-formed by filamentous cyanobacteria into long
mats
-Sharkbay: dark grey and calcified
Questions & Answers (Grade A+)
lessons from genomics -
correct answer ✅1. organismal complexity not directly correlated
w/ genetic complexity
2. large number of open reading frames encode proteins w/o any
known function
3. far more horizontal gene transfer than expected between
prokaryotes (bacteria)
4. pathogenicity islands play important role in ability of bacteria to
cause disease (they have more genes)
5. parasitic bacteria that depend on their hosts for survival have
stream lined their genomes (lost a lot of their genes that allow
them to live on their own
species -
correct answer ✅a group of actually or potentially interbreeding
natural populations, which are reproductively isolated from other
such groups
traditional methods for classifying microbes -
correct answer ✅- morphology
-physiology
- ecology
,MBIO 3401 Test 3 - TTU Jeter Exam
Questions & Answers (Grade A+)
- medical importance
molecular methods for classifying microbes -
correct answer ✅- nucleic acid hybridization- isolate DNA from 2
bacteria and see if they can form hybrids
- protein electrophoresis
***- nucleic acid and protein sequencing- 16s rRNA from
prokaryotes and 18s rRNA from eukaryotes
7 types of Gram (-) bacteria -
correct answer ✅1. photosynthetic bacteria
2. chemolithotrophs
3. Spirilla
4. Myxobacteria
5. Bacterial bioluminescence
6. Spirochete
7. Rickettsias and Chlamydias
How are Gram (+) bacteria phyla based on -
correct answer ✅low G+C or high G+C
,MBIO 3401 Test 3 - TTU Jeter Exam
Questions & Answers (Grade A+)
low G+C Gram (+) bacteria phyla -
correct answer ✅1. Firmicutes
2. Tenericutes
high G+C Gram (+) bacteria phyla -
correct answer ✅1. phylum Actinobacteria
metagenomics -
correct answer ✅pooled dna or rna from environment sample
containing organisms that have not been isolated before
how does concept of species differ between prokaryotes and
eukaryotes? -
correct answer ✅species- a group of actually or potentiall
interbreeding natural populations, which are reproductively
isolated from other such groups
-eukaryotes do sexual reproduction & prokaryotes do not
- prokaryotes used to be differentiated by things like morphology,
physiology, and ecology
what molecular technique is most widely used today to distinguish
evolutionary lineages of microorganisms and how does it differ
, MBIO 3401 Test 3 - TTU Jeter Exam
Questions & Answers (Grade A+)
from more traditional methods? -
correct answer ✅- nucleic acid and protein sequencing (16SrRNA
vs 18SrRNA)
- used to be by morphology, physiology, ecology & medical
importance
What are the 3 domains of life? -
correct answer ✅Bacteria, Archaea, Eukarya
what is the most widely accepted scheme for the major lines of cell
descent during the history of life on Earth? -
correct answer ✅Progenote
-then led to LUCA which split to ancestral archea, urkaryotes, &
ancestral bacteria
-these led to modern archea, eukaryotes, & modern bacteria
-mitochondria and chloroplasts led to eukaryotes (previously in
bacteria)
Stromatolites -
correct answer ✅-formed by filamentous cyanobacteria into long
mats
-Sharkbay: dark grey and calcified
