Question

Some bacteria are photosynthetic. Where are the photosynthetic pigments located in these cells?

• A. In chloroplasts
• B. On special membranes
• C. In the cell cytoplasm
• D. In the infolding of the plasma membrane

Answer 1

Answer:

D. In the infolding of the plasma membrane

• In photosynthetic bacteria, photosynthetic pigments are located in the infolding of the plasma membrane.

• This is because bacteria lack membrane-bound organelles like chloroplasts, which are found in plant cells

• .In photosynthetic bacteria, photosynthetic pigments like bacteriochlorophyll are indeed found in the infoldings of the plasma membrane, not in specialized organelles like chloroplasts.

• This is because bacteria are prokaryotes and lack the membrane-bound organelles characteristic of eukaryotic cells like plants.

• Instead of chloroplasts, bacteria have specialized structures called chromatophores (or thylakoids) that are extensions of the plasma membrane, and these structures contain the photosynthetic pigments.