MBIO 3401 EXAM 1 ZHANG 2025
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
why cant bacteria grow in solutions with viery high [] of sugar - ANSWERS-sugar
raises the solutions osmolarity
QUESTION 2
a bacterium tolerates a pH range of 3-10. this represetns ______ difference in h+
ion [] - ANSWERS-10,000,00 fold
QUESTION 3
what can organisms do during starvation - ANSWERS-undergo programmed cell
death, protect against reactive oxygen species, protect against temp and pH
extremes
QUESTION 4
marine viruses play a role in which of the following cycles - ANSWERS-carbon
cycle
QUESTION 5
END OF
PAGE 1
, MBIO 3401 EXAM 1 ZHANG 2025
what do all viruses contain - ANSWERS-a capsid and a genome
QUESTION 6
viroids are ___ agents that infect ____ - ANSWERS-RNA, plants
QUESTION 7
what does the bacteriophage t4 posses? - ANSWERS-a icosohedral head and
helical neck
QUESTION 8
the baltimore system classifies viruses based on predominately what feature -
ANSWERS-means of RNA synthesis
QUESTION 9
END OF
PAGE 2
, MBIO 3401 EXAM 1 ZHANG 2025
when a bacterial cell is infected by a bacteriophage the capsid - ANSWERS-
remains on the outside of the hsot cell
QUESTION 10
some bac. virusses can insert their genome into chromo of hsot. what is that called
- ANSWERS-prophage
QUESTION 11
genome - ANSWERS-the primary factor determining the life cycle of animal virsu
QUESTION 12
the period of time whe virons are virtually undetectable - ANSWERS-eclipse
period
QUESTION 13
the sequence of one strand of DNA 5" TCGATC 3' what is the comp strand -
ANSWERS-5' GATCGA 3'
END OF
PAGE 3
, MBIO 3401 EXAM 1 ZHANG 2025
QUESTION 14
supoercoiling is typically introduced by an enzyme calle dDNA - ANSWERS-
gyrase
QUESTION 15
correct order of proteins involved in DNA replicatioin - ANSWERS-DNAa,
primase, DNA pol III, ligase
QUESTION 16
primer in DNA replication ____ starter sequence with a free ___ group -
ANSWERS-an RNA, 3'OH
noncoding sequences of euk chromo - ANSWERS-introns and pseudogenes
sigma factor is required for - ANSWERS-transcription initiation
END OF
PAGE 4
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
why cant bacteria grow in solutions with viery high [] of sugar - ANSWERS-sugar
raises the solutions osmolarity
QUESTION 2
a bacterium tolerates a pH range of 3-10. this represetns ______ difference in h+
ion [] - ANSWERS-10,000,00 fold
QUESTION 3
what can organisms do during starvation - ANSWERS-undergo programmed cell
death, protect against reactive oxygen species, protect against temp and pH
extremes
QUESTION 4
marine viruses play a role in which of the following cycles - ANSWERS-carbon
cycle
QUESTION 5
END OF
PAGE 1
, MBIO 3401 EXAM 1 ZHANG 2025
what do all viruses contain - ANSWERS-a capsid and a genome
QUESTION 6
viroids are ___ agents that infect ____ - ANSWERS-RNA, plants
QUESTION 7
what does the bacteriophage t4 posses? - ANSWERS-a icosohedral head and
helical neck
QUESTION 8
the baltimore system classifies viruses based on predominately what feature -
ANSWERS-means of RNA synthesis
QUESTION 9
END OF
PAGE 2
, MBIO 3401 EXAM 1 ZHANG 2025
when a bacterial cell is infected by a bacteriophage the capsid - ANSWERS-
remains on the outside of the hsot cell
QUESTION 10
some bac. virusses can insert their genome into chromo of hsot. what is that called
- ANSWERS-prophage
QUESTION 11
genome - ANSWERS-the primary factor determining the life cycle of animal virsu
QUESTION 12
the period of time whe virons are virtually undetectable - ANSWERS-eclipse
period
QUESTION 13
the sequence of one strand of DNA 5" TCGATC 3' what is the comp strand -
ANSWERS-5' GATCGA 3'
END OF
PAGE 3
, MBIO 3401 EXAM 1 ZHANG 2025
QUESTION 14
supoercoiling is typically introduced by an enzyme calle dDNA - ANSWERS-
gyrase
QUESTION 15
correct order of proteins involved in DNA replicatioin - ANSWERS-DNAa,
primase, DNA pol III, ligase
QUESTION 16
primer in DNA replication ____ starter sequence with a free ___ group -
ANSWERS-an RNA, 3'OH
noncoding sequences of euk chromo - ANSWERS-introns and pseudogenes
sigma factor is required for - ANSWERS-transcription initiation
END OF
PAGE 4
