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Samenvatting DNA - Natuurwetenschappen

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In deze samenvatting vind je alles wat je moet weten over DNA.

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Secondary school
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KSO
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School year
5

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Uploaded on
April 19, 2021
Number of pages
3
Written in
2020/2021
Type
Summary

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Natuurwetenschappen
1. De celcyclus
2. DNA replicatie,
3. DNA als codesysteem
4. DNA en eiwitsynthese
a. Transcriptie


1. de celcyclus
2 fases
 Delingsfase (M-fase)
 Interfase
o Groeifase 1  de cel groeit
o Synthese fase (S-fase)  aanmaken van extra DNA, DNA X 2
o Groeifase 2  verdere celgroei …
GO-fase = wanneer de cellen zich niet meer splitsen komen ze in deze
fase terecht. Geen celdeling meer aanwezig dus.


De genetische informatie bevindt zich in de celkern of nucleus
Voortplantingscellen ( zaadcel, eicel ) bevatten maar de helft van de
informatie  als ze samenkomen zijn ze weer voltallig ( elk 23
chromatinevezels, samen 46)



2. DNA replicatie
Replicatie gebeurd in de S-fase, nadat de cellen in de M-fase verdeeld
werden
DNA strengen hangen vast door waterstofbruggen in de M-fase, deze
worden terug bijgevuld in de S-fase


A–T
G–C
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