Bacteria do not have chloroplast, but some bacteria are photoautotrophic in nature and perform photosynthesis.

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asked Feb 5, 2018 in Class IX Science by saurav24 Expert (1,416 points)
Bacteria do not have chloroplast, but some bacteria are photoautotrophic in nature and perform photosynthesis. Which part of bacterial cell performs this ?

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2 Answers

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answered Feb 5, 2018 by navnit40 (-2,975 points)
Bacterial cell do not have chloroplast but yet some photoautotrophic bacteria perform photosynthesis due to the presence of chlorophyll in coperated in the membrane. Embedded in the cell membrane are reaction centers which specifically absorb light energy. These reaction centre exist in forms of sacs-tubes or sheets depending on the amount of surface area needed.
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answered Apr 27 by rakshitmawa1 Basic (24 points)
Because Photosynthetic bacteria contain unstacked photosynthetic membranes with light harvesting pigments, which work like thylakoids of chloroplast.

Explanation:
Example:
The Cyanobacteria are the largest and most diverse group of photosynthetic bacteria previously known as blue green algae . These are true prokayotes having no chloroplast but still perform photosynthesis.
The reason for this is that they have chlorophylls which are dispersed in cytoplasm(not packed in chloroplast like photosynthetic eukaryotes). They carry out oxygenic photosynthesis i.e, they use water as an electron donor and generate oxygen during photosynthesis. Their photosynthetic systems closely resembles to that of eukaryotes:

These bacteria use Phycobilins as accessory pigments.
Photosynthetic pigments and electron transport chain(ETC) components are located in thylakoid membranes linked with particles called Phycobilisomes.
Phycocyanin(blue) pigment is their predominant phycobilin.
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  in these bacteria is assimilated through calvin cycle.
Hope it helps...

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