Biology · JC 1 · Chloroplast Ultrastructure and Photosynthetic Pigment Absorption · Semester 2
Variation and Adaptation
Students will explore the concepts of variation within a species and how organisms are adapted to their environments.
MOE Syllabus OutcomesMOE: Diversity of Living Things - MS
About This Topic
Students will explore the concepts of variation within a species and how organisms are adapted to their environments.
Key Questions
- Relate the ultrastructural features of the chloroplast, thylakoid membranes, grana, stroma, and envelope membranes, to the spatial separation of the light-dependent stage in thylakoid membranes and the light-independent stage in the stroma.
- Analyse the absorption spectra of chlorophyll a, chlorophyll b, and carotenoids and evaluate why accessory pigments broaden the range of wavelengths that can drive photosynthesis, referencing the action spectrum as corroborating evidence.
- Design a thin-layer chromatography experiment to separate photosynthetic pigments from a leaf extract, explaining how Rf values are used to identify each pigment and how the separation is governed by polarity differences.
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