Interaction & Interdependence C.3 Photosynthesis (id: 098a1cf1c)

本题目来源于试卷: Interaction & Interdependence C.3 Photosynthesis，类别为 IB生物学

[问答题]
The diagram shows the separation of photosynthetic pigments using the thincixfm /,lyz.g7m6fq7 -lay7xdt el(/i+ wtyuv)rx0*k6z gh.(xq wi8 2kdy er chrom7d t.xd/kvhr)( xieu yyq08wz k+gl(26i x*wtatography (TLC) technique in the solvent propanone.

1.Identify a pigment that is present in cabbage but not in spinach
2.Outline the method used to extract the pigments from the plant leaves.
3.1Outline what information the Rf value provides in this experiment.
2.Calculate the Rf value of Xanthophyll, showing your working.
4.Spinach also contains Lycopene, an orange/red pigment. Suggest why it is absent from the chromatogram.
5.Deduce, with a reason, what pigment X is.
6.Explain why the origin must be above the solvent at the start of the experiment.
7.Explain why it is important that the TLC plate is held by its edges when setting up this experiment.

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