A chloroplast is composed of many structures, each with a different function. Several chloroplast structures are listed. stroma lamellae thylakoid membrane ribosome starch grain DNA outer membrane thylakoid space From the list:

1. (a)(i)identify the structures involved in the production of rubisco[2]
2. (a)(ii)identify the structure that contains a high concentration of protons in daylight.[1]
3. (b)Paper chromatography is a technique that can be used to separate a mixture of four common chloroplast pigments. The pigments can be identified by calculating their R₁ values. A student carried out paper chromatography on a solution containing a mixture of chloroplast pigments. The results are shown in Table 7.1. [Table 7.1] Complete Table 7.1.[3]
4. (c)Fig. 7.1 shows the absorption spectrum for carotene and for chlorophyll a. [Figure 7.1] With reference to Fig. 7.1, describe and explain the role of carotene in photosynthesis.[4]

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