(a) Fig. 8.1 is a diagram of a chloroplast. K L M Fig. 8.1 Using the letters K–N, complete Table 8.1. Each letter may be used once, more than once, or not at all. Table 8.1 high concentration of protons location of photosynthetic pigments site of light-independent stage site of light-dependent stage N letter

1. (a)Using the letters K–N, complete Table 8.1. Each letter may be used once, more than once, or not at all. Table 8.1 high concentration of protons location of photosynthetic pigments site of light-independent stage site of light-dependent stage letter[4]
2. (b)Chlorophyll a is the main photosynthetic pigment in plants. Describe the role of other photosynthetic pigments found in plant chloroplasts.[4]
3. (c)The absorption of different wavelengths of light by chloroplast pigments can be represented by an absorption spectrum. Fig. 8.2 is an absorption spectrum of an extract of chloroplast pigments and an absorption spectrum of whole chloroplasts. 10 9 8 7- 6 absorbance / arbitrary units 5 4 3 whole chloroplasts 2 pigment extract 1 0+ 400 450 500 550 600 650 700 wavelength/nm Fig. 8.2 With reference to Fig. 8.2, describe the differences between the two spectra and suggest explanations for the differences.[4]

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