2.1.1 Noem die deel van die sel waar hierdie proses plaasvind - NSC Life Sciences - Question 2 - 2022 - Paper 2
Question 2
2.1.1 Noem die deel van die sel waar hierdie proses plaasvind.
2.1.2 Identifiseer:
(a) Suiker X
(b) Stikstofbasis Y
2.1.3 Tabelleer TWEE verskillende tussen transk... show full transcript
Worked Solution & Example Answer:2.1.1 Noem die deel van die sel waar hierdie proses plaasvind - NSC Life Sciences - Question 2 - 2022 - Paper 2
Step 1
2.1.1 Noem die deel van die sel waar hierdie proses plaasvind.
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Answer
Die proses van transkripsie vind plaas in die nucleus of selkern van die sel.
Step 2
2.1.2 Identifiseer:
(a) Suiker X
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Suiker X is Deoksiribose.
Step 3
2.1.2 Identifiseer:
(b) Stikstofbasis Y
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Stikstofbasis Y is Uraciel (U).
Step 4
2.1.3 Tabelleer TWEE verskillende tussen transkripie en DNS/DNA-replisering.
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Transkripie gebruik RNS as 'n template, terwyl DNS replisering gebruik maak van DNS as 'n template.
In transkripie is die produkte RNS-molekules, terwyl die produk van DNS replisering twee DNS-strenge is.
Step 5
2.2.1 Noem die tipe mutasie wat plaasvind.
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Die tipe mutasie wat plaasvind is 'n puntmutasie.
Step 6
2.2.2 Gee 'n rede vir jou antwoord op VRAAG 2.2.1.
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Daar is 'n verandering in die volgorde van stikstofbasisse wat 'n spesifieke aminosuurvervanging kan veroorsaak.
Step 7
2.2.3 (b) Gee die antykodon op die oRNS/tRNA-molekul wat die aminosuur isoleusien dra.
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Die antykodon vir die isoleusien kodon (AUA) is UAU.
Step 8
2.2.3 (c) Gee 'n goedgekeurde verduideliking in die inligting om die effek van die mutasie op spees te beskryf.
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Die mutasie kan lei tot die produksie van 'n ander proteïen of geen proteïen nie, wat gevolge kan hê op die organismes se funksies.
Step 9
2.3.1 Hoeveel chromosome sal aanwezig wees in:
(a) Muisselle tydens Telofase II van meiose.
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Muisselle tydens Telofase II van meiose sal 20 chromosome hê.
Step 10
2.3.1 Hoeveel chromosome sal aanwezig wees in:
(b) 'n Blaarsel van 'n pynappeltplant.
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'n Blaarsel van 'n pynappeltplant sal 50 chromosome hê.
Step 11
2.3.2 Verduidelik waarom die spermsel van 'n kameelperd 15 chromosome het.
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Die spermsel is 'n gamete, gevorm deur meiose, en moet haploïed wees, wat beteken dit het die helfte van die chromosoomgetal.
Step 12
2.3.3 Noem die fase van meiose waar die halvering van die chromosoomgetal begin.
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Die halvering van die chromosoomgetal begin in Telofase I van meiose.
Step 13
2.4.1 Hoeveel mense het die genotype AB?
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Daar is 54 000 mense met die genotype AB.
Step 14
2.4.2 Bereken die waarde van X. Toon ALLE bewerkings.
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Die bevolking is 1 800 000, dus:
A + B + AB = totale bevolking
954 000 + 180 000 + 54 000 + X = 1 800 000
X = 1 800 000 - (954 000 + 180 000 + 54 000)
X = 612 000.
Step 15
2.4.3 Beskryf 'n kind die bloedgroep oerf wat deur 3 persent van hierdie bevolking verteenwoordig word.
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'n Kind wat die bloedgroep O erf sal twee O allele van elke ouer nodig hê, wat 3% van die bevolking verteenwoordig.
Step 16
2.5.1 Identifiseer die TWEE biologiese kinders.
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Die biologiese kinders is Heila en Leo.
Step 17
2.5.2 Noem DRIE en gebruik van die DNS/DNA-profielasemeling.
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Die drie gebruik van die DNS/DNA-profielasemeling sluit in:
Identifisering van biologiese afstamming.
Verifying of DNA-eweknieë tussen personages.
Identifisering van misdade of familiêre verband.
Step 18
2.6 Bruin emale van die tande is 'n geslagsggekoppelde kenmerk. 'n Dominante eienskap.
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Hierdie eienskap is geslagsgekoppeld en kan geerf word as gevolg van die interaksie tussen die X- en Y-chromosome.
