Q. Consider the following statements:
1.Thylakoids provide structural support for the chloroplast in the plant cell.
2.Cyanobacteria are photosynthetic bacteria that obtain energy through photosynthesis.
Which of the statement(s) given above is/are correct?
Explanation –
Statement 1 is incorrect. Thylakoids are membrane-bound structures within chloroplasts that contain chlorophyll and other pigments involved in capturing light energy during photosynthesis. While they are essential for photosynthesis, their primary function is not to provide structural support for the chloroplast. They are found in ancient, light-sensitive bacteria called cyanobacteria. They store chlorophyll, the substance in plants that reacts to sunlight and triggers photosynthesis. The thylakoid’s function is to perform light-dependent reactions in photosynthesis.
Statement 2 is correct. Cyanobacteria, also known as blue-green algae, are photosynthetic bacteria that carry out oxygenic photosynthesis, similar to plants. They have the ability to convert light energy from the sun into chemical energy through photosynthesis, using water and carbon dioxide to produce oxygen and sugars.
Source: Forum IAS
