Question

Choose the correct answer from the alternatives given.
Photosynthetic pigments

• A. absorb specific wavelengths of light in their absorption spectra
• B. include chlorophyll a, b, and the carotenoids
• C. have their absorption spectra analysed using a spectrophotometer
• D. all of the above

Answer 1

The correct option is D all of the above

A photosynthetic pigment (accessory pigment; chloroplast pigment; antenna pigment) is a pigment that is present in chloroplasts or photosynthetic bacteria and captures the light energy necessary for photosynthesis. Chlorophyll a is the main pigment. It absorbs light mainly in the red and blue regions of the spectrum. Chlorophyll b, xanthophyll and carotene are 'accessory pigments'. They absorb light from other regions of the spectrum and pass the energy onto chlorophyll a. The action spectrum shows the rate of photosynthesisat different wavelengths. The absorption spectrum shows how strongly the pigments absorb at different wavelengths and recorded by a spectrophotometer.

So, the correct option is, 'All of the above'.