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Examen-/toepassingsvragen voor H2 biologie VWO 4 $6.80
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Examen-/toepassingsvragen voor H2 biologie VWO 4

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Drie reageerbuizen worden gevuld met oplossingen van keukenzout (NaCl) van verschillende concentraties. Buis 1 bevat een 0,1% NaCl-oplossing, buis 2 bevat een 0,9% NaCl-oplossing en buis 3 bevat een 1,5% NaCl-oplossing. In elk van deze buizen wordt een stukje van hetzelfde verse dierlijke weefsel ondergedompeld. De stukjes weefsel zijn allemaal even groot en rood van kleur. Voordat ze in de buizen zijn gedaan, zijn ze eerst goed afgespoeld totdat ze geen kleurstof meer afgeven. Na een half uur wordt het experiment beëindigd. De oplossing in buis 1 is licht rood geworden. De oplossingen in buis 2 en 3 zijn kleurloos gebleven. Wat is de juiste verklaring voor het licht rood worden van de oplossing in buis 1? A) De celwanden zijn kapot gegaan omdat de omgeving hypertonisch was B) De cellen in het weefsel zijn kleiner geworden omdat er water uit de cel is gegaan. C) In de cellen zijn (rode) chromoplasten ontstaan D) De cellen zijn gesprongen omdat ze water hebben opgenomen.
Drie reageerbuizen worden gevuld met oplossingen van keukenzout (NaCl) van verschillende concentrati...
D, De cellen zijn gesprongen omdat ze water hebben opgenomen.
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