Describe how the functional units for beta carotene, xanthophyll, chlorophyll a, and chlorophyll b are different. be sure to identify the subunits that adhere to paper during chromatography.

Further explanation

chlorophyll is a tetrapirol pigment, a ring of porphyrin in the form of dehydro and green metal atoms. Chlorophyll, is the green pigment present in chloroplasts together with carotene and xanthophyll. Found in leaf vegetables, fruits that are still young or green. Stored in chloroplastid.

chlorophyll a and b are different from matom c no.3, methyl (a) is replaced by aldehit (CHO). chlorophyll a is included in a pigment called porphyrins; hemoglobin is also included. In principle the chlorophyll molecule is very large and consists of four pyrrole rings connected to each other. The methane group (-CH =) forms a flat molecule. In the seventh carbon there is a propionate residue that is identified with phytol and this branch chain dissolves in lipids.

carotenoids have pigments that are yellow-red, orange. Carotenoids are present in chloroplasts (0.5%) together with chlorophyll (9.3%), especially in the upper surface of the leaves, close to the walls of palisade cells. Carotenoids are found in papaya, banana peels, tomatoes, red chillies, mangoes, carrots sweet potatoes and on some yellow and red flowers.

Carotenoids are grouped into two carotenoids (there are hydrocarbon groups) and xanthophils (containing o in the form of hydroxyl, methoxyl, carboxyl groups). Based on its constituent elements, carotenoids can be classified into two groups of pigments, carotene and xanthophyll. Carotene has a chemical composition consisting only of C and H such as alpha, beta gamma carotene. While xanthophyll consists of atoms C, H and O. Examples of compounds included in xanthophyll include: cantaxanthin, astaxanthin, rodoxanthin and torularhodin.

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Class: college

Subject: biology

Keywords : chlorophyll, carotenoids, atoms, pigment.

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