From that you can deduce that any part of the plant that has chloroplasts will be photosynthetic. However, some plant parts contain relatively higher numbers of chloroplasts, particularly the mesophyllic cells in leaf cells. These are openings through which CO 2 can enter the leaf and O 2 exits. Chlorophyll is the green pigment involved in harvesting light energy. Chlorophyll a absorbs light with wavelengths around 680-700 nanometers in length.
Chlorophyll b broadens the range of light wavelengths that a plant can use.
Electromagnetic Spectrum . The reaction center chlorophyll molecule then passes those excited electrons to its electron transport system. Light Independent Reactions . Through a cyclical series of reactions, carbon is captured and becomes part of a G3P molecule the precursor of a glucose molecule. One G3P leaves the cycle each time around and it takes 2 G3P molecules to form one glucose.