AQA A-level Biology - Topic 4 questions and answers 100% guaranteed success.

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AQA A-level Biology - Topic 4 questions and
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answers 100% guaranteed success.
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Define cvariation c- c ccorrect canswer. c c cDifferences cthat cexist cbetween cindividuals c
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In cwhat cways ccan cvariation cbe ccaused? c- c ccorrect canswer. c c cIt ccan cbe ccaused cby
cgenetic cfactors, csuch cas calleles cfrom cmutations. c

It ccan calso cbe ccaused cby cthe cenvironment, csuch cas cclimate. c
Most cvariation cis ccaused cby ca ccombination cof cgenetic cfactors cand cenvironmental
cfactors c
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Why cis cit cimpossible cto cstudy ca cwhole cpopulation? c- c ccorrect canswer. c c cBecause cit cis
ctoo clarge cand cwould ctake ctoo clong. cInstead, cscientists cuse ca csample cthat cis

crepresentative cof cthe cspecies' cpopulation c
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Why cshould cthe csample ctaken cbe crandom? c- c ccorrect canswer. c c cSo cyou ccan cmake
csure cthat cthe csample cisn't cbiased cin cany cway. c
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What ccould cyou ccalculate cto clook cat cvariation cbetween cspecies? c- c ccorrect canswer. c c
cThe cmean c(average) c
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What cis cstandard cdeviation? c- c ccorrect canswer. c c cIt ctells cyou chow cmuch cvalues cin ca
csingle csample cvary, cby cmeasuring cthe cspread cof cvalues cabout cthe cmean c
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What cdoes ca clarge cstandard cdeviation cmean? c- c ccorrect canswer. c c cThat cthe cvalues
cin cthe csample cvary ca clot c
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What cdoes ca csmall cstandard cdeviation cmean? c- c ccorrect canswer. c c cThat cthe cvalues
cin cthe csample cvaries clittle c
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What ccan cyou cuse cstandard cdeviation cto cdraw con ca cbar cchart cof cmean cvalues? c- c
ccorrect canswer. c c cAn cerror cbar. cYou cwould cdraw cit cone cstandard cdeviation ceither cside

cof cthe cmean cvalue. c
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How cis cDNA cstored cin ceukaryotic ccells? c- c ccorrect canswer. c c c1) cThe cDNA cis clinear
cand cexists cas cchromosomes c

2)It cis cstored cin cthe cnucleus, cand chas cto cbe cwound cup cbecause cit cis cso clong c

, 3) cIt cis cwound caround cproteins ccalled chistones cwhich chelp cto csupport cthe cDNA c
4)The cDNA cis ccoiled cvery ctightly cto cmake ca ccompact cchromosome c
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How cis cDNA cstored cin cprokaryotic ccells? c- c ccorrect canswer. c c c1)Prokaryotic ccells
ccarry c

DNA cas cchromosomes, cbut cthe cDNA cis cshorter cand ccircular c
2)It cisn't cwrapped caround chistones, cso ccondenses cinto cthe ccell cby csupercoiling c
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What corganelles cin ceukaryotic ccells chave ctheir cown cDNA capart cfrom cthe cnucleus? c- c
ccorrect canswer. c c cThe cmitochondria cand cchloroplasts chave ctheir cown cDNA. cIt cis

csimilar cto cprokaryotic cDNA cas cit cis cshorter, ccircular cand cisn't cwrapped caround

chistones. c
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What cis ca cgene? c- c ccorrect canswer. c c cA cgene cis ca csequence cof cDNA cbases cthat
ccodes cfor ca cpolypeptide cor cfunctional cRNA c
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What cforms cthe cprimary cstructure cof cproteins? c- c ccorrect canswer. c c cThe csequence cof
camino cacids. c
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What cdetermines cthe corder cof camino cacids cin ca cpolypeptide? c- c ccorrect canswer. c c
cThe corder cof cthe cbases c
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How cis ceach camino cacid ccoded cfor? c- c ccorrect canswer. c c cBy ca csequence cof cthree
cbases cin ca cgene ccalled ca ctriplet c
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What cis cfunctional cRNA? c- c ccorrect canswer. c c cIt cis cRNA cmolecules cother cthan cmRNA
cthat cperform cspecial ctasks cduring cprotein csynthesis. c c
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tRNA cand crRNA c
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What cis ca ccell's cgenome? c- c ccorrect canswer. c c cThe ccomplete cset cof cgenes cin ca ccell c
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What cis ca ccell's cproteome? c- c ccorrect canswer. c c cThe cfull crange cof cproteins cthat cthe
ccell cis cable cto cproduce c
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If ca cgene cdoesn't ccode cfor cpolypeptides, cwhat cdoes cit ccode cfor? c- c ccorrect canswer. c c
cFunctional cRNA csuch cas ctRNA cand crRNA c
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What care cintrons? c- c ccorrect canswer. c c cSections cof ca cgene cthat ccodes cfor
cpolypeptides, cthat cdoesn't cactually ccode cfor camino cacids c
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What care cexons? c- c ccorrect canswer. c c cThe csections cof ca cgene cthat cactually ccode cfor
camino cacids c
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When care cintrons cremoved, cand cwhy? c- c ccorrect canswer. c c cThey care cremoved cduring
cprotein csynthesis cso cit cdoesn't caffect cthe camino cacid corder c
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Which ctype cof cDNA cdoes cnot chave cintrons? c- c ccorrect canswer. c c cProkaryotic cDNA
cdoes cnot chave cintrons c
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What cis can callele? c- c ccorrect canswer. c c cThe csame cgene, cbut ca cdifferent cversion cof cit c
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