PORTAGE LEARNING-
MICROBIOLOGY: MODULE 6 REVIEW
QUESTIONS AND CORRECT
ANSWERS
DefineA2aA2VirusA2-A2Ans--VirusesA2areA2small,A2non-
cellularA2particlesA2thatA2cannotA2replicateA2unlessA2insideA2aA2livingA2hostA2cell.
WhatA2areA2virusesA2consideredA2-A2Ans--obligateA2intracellularA2parasites
AreA2virusesA2prokaryotic/eukaryoticA2andA2living/non-livingA2-A2Ans--
NeitherA2andA2nonA2livingA2butA2theyA2playA2aA2largeA2roleA2inA2microbiology
WhatA2areA2theA2twoA2basicA2componentsA2ofA2aA2virusA2-A2Ans--
(1)A2genomicA2materialA2comprisedA2ofA2eitherA2DNAA2orA2RNAA2andA2(2)A2aA2capsid,A2aA2
membrane-likeA2protectiveA2structureA2thatA2containsA2theA2geneticA2material
DescribeA2virusA2genomeA2-A2Ans--ViralA2genomeA2isA2diverseA2
eitherA2doubleA2orA2single-stranded
foundA2inA2circularA2orA2linearA2arrangements
DescribeA2theA2sizeA2ofA2aA2viralA2genomeA2-A2Ans--
varyA2fromA2justA2aA2fewA2thousandA2nucleotideA2baseA2pairsA2(aboutA27,700A2bpA2forA2pol
iovirus)A2toA2roughlyA22.5A2millionA2nucleotidesA2(likeA2pandoravirus
WhatA2isA2anA2envelopeA2onA2aA2virusA2-A2Ans--
anA2additionalA2membraneA2thatA2surroundsA2theA2caspidA2
derivedA2fromA2theA2hostA2cellA2membraneA2andA2servesA2asA2anA2additionalA2barrierA2toA2
theA2externalA2environment
DescribeA2aA2nakedA2orA2non-envelopeA2virusA2-A2Ans--
aA2virusA2simplyA2surroundedA2byA2theA2proteinA2capsid
DescribeA2whichA2virusesA2doA2andA2doA2notA2haveA2envelopesA2-A2Ans--
majorityA2ofA2animalA2virusesA2areA2envelopedA2
A2majorityA2ofA2plantA2orA2bacteria-infectingA2virusesA2areA2not
WhichA2microscopeA2shouldA2beA2usedA2toA2seeA2differentA2compositionsA2ofA2virusesA2-
A2Ans--TheA2electronA2microscope
WhatA2stepsA2mustA2firstA2happenA2beforeA2replicationA2canA2takeA2placeA2-A2Ans--
theA2genomeA2isA2replicatedA2followingA2attachmentA2andA2entry,
MICROBIOLOGY: MODULE 6 REVIEW
QUESTIONS AND CORRECT
ANSWERS
DefineA2aA2VirusA2-A2Ans--VirusesA2areA2small,A2non-
cellularA2particlesA2thatA2cannotA2replicateA2unlessA2insideA2aA2livingA2hostA2cell.
WhatA2areA2virusesA2consideredA2-A2Ans--obligateA2intracellularA2parasites
AreA2virusesA2prokaryotic/eukaryoticA2andA2living/non-livingA2-A2Ans--
NeitherA2andA2nonA2livingA2butA2theyA2playA2aA2largeA2roleA2inA2microbiology
WhatA2areA2theA2twoA2basicA2componentsA2ofA2aA2virusA2-A2Ans--
(1)A2genomicA2materialA2comprisedA2ofA2eitherA2DNAA2orA2RNAA2andA2(2)A2aA2capsid,A2aA2
membrane-likeA2protectiveA2structureA2thatA2containsA2theA2geneticA2material
DescribeA2virusA2genomeA2-A2Ans--ViralA2genomeA2isA2diverseA2
eitherA2doubleA2orA2single-stranded
foundA2inA2circularA2orA2linearA2arrangements
DescribeA2theA2sizeA2ofA2aA2viralA2genomeA2-A2Ans--
varyA2fromA2justA2aA2fewA2thousandA2nucleotideA2baseA2pairsA2(aboutA27,700A2bpA2forA2pol
iovirus)A2toA2roughlyA22.5A2millionA2nucleotidesA2(likeA2pandoravirus
WhatA2isA2anA2envelopeA2onA2aA2virusA2-A2Ans--
anA2additionalA2membraneA2thatA2surroundsA2theA2caspidA2
derivedA2fromA2theA2hostA2cellA2membraneA2andA2servesA2asA2anA2additionalA2barrierA2toA2
theA2externalA2environment
DescribeA2aA2nakedA2orA2non-envelopeA2virusA2-A2Ans--
aA2virusA2simplyA2surroundedA2byA2theA2proteinA2capsid
DescribeA2whichA2virusesA2doA2andA2doA2notA2haveA2envelopesA2-A2Ans--
majorityA2ofA2animalA2virusesA2areA2envelopedA2
A2majorityA2ofA2plantA2orA2bacteria-infectingA2virusesA2areA2not
WhichA2microscopeA2shouldA2beA2usedA2toA2seeA2differentA2compositionsA2ofA2virusesA2-
A2Ans--TheA2electronA2microscope
WhatA2stepsA2mustA2firstA2happenA2beforeA2replicationA2canA2takeA2placeA2-A2Ans--
theA2genomeA2isA2replicatedA2followingA2attachmentA2andA2entry,