EVERYDAY SCIENCE

Detailed explanation-1: -Pyrenoids are composed of a dense proteinaceous region surrounded by a starchy sheath. These are unique to algae chloroplast and are related to polymerizing sugars into starch (reserve polymers).

Detailed explanation-2: -Pyrenoids contain protein enzymes like RuBisCO and also store starch.

Detailed explanation-3: -Pyrenoids are commonly present in the chloroplasts of many algae and also in the bryophyte. These are composed of a granular, homogeneous matrix around which starch deposits are found. They are associated with the operation of a carbon-concentrating mechanism (CCM).

Detailed explanation-4: -Pyrenoids are round protein bodies found in the chloroplast of green algae. They are the centres of conversion of glucose to starch.

Detailed explanation-5: -Pyrenoids are present in the chloroplasts of a wide variety of algae. In the green algae, dinoflagellates, cryptomonads, and Euglena, they appear as dense bodies surrounded by a shell of starch or paramylon.