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The pyrenoids are made up are

(a) Proteinaceous centre and starchy sheath 

(b) Core of protein surrounded by fatty sheath 

(c) Core of starch surrounded by sheath of protein 

(d) Core of nucleic acid surrounded by protein sheath

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Correct option (a) proteinaceous centre and starchy sheath

Explanation :

Pyrenoids consist of dense proteinaceous area surrounded by starchy sheath. These are unique to chloroplast of algae and are associated in polymerising sugars into reserve polymers (starch).

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