SCIENCE
BOTANY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Protein surrounded by oil droplets
|
|
|
Starch surrounded by protein grains
|
|
|
Protein surrounded by Starch grains
|
|
|
Starch surrounded by oil droplets
|
Detailed explanation-1: -Pyrenoids consist of a protein-like central, viscous granular core and this core is surrounded by tightly packed minute plates, called starch plates or starch cells. Pyrenoids are composed of a dense proteinaceous region surrounded by a starchy sheath.
Detailed explanation-2: -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). Thus the correct answer is option B.
Detailed explanation-3: -Core of protein surroundes by fatty sheath.
Detailed explanation-4: -Final answer: Pyrenoids are made up of proteinaceous centre and starchy sheath.
Detailed explanation-5: -The pyrenoid, a dense structure inside or beside chloroplasts of certain algae, consists largely of ribulose biphosphate carboxylase, one of the enzymes necessary in photosynthesis for carbon fixation and thus sugar formation. Starch, a storage form of glucose, is often found around pyrenoids.