Carotenoids

Assertion : Carotenoids play a protective role for the chloroplasts during photolysis of water. Reason : Carotenoids pick the nascent oxygen by means of their double bonds and convert the same into molecular state.

Introduction|Importance of Photosynthesis|Early Photosynthetic Experiments|Where Photosynthesis Takes Place|Chloroplast|Division of Labour|Photosynthetic Pigments|Chlorophyll|Carotenoids|Phycobillins|Action and Absorption Spectrum of Chlorophyll A|Photosy

Match the following for PGR and their chemical nature and select the correct option. {:(,"Column I",,"Column I"),(A.,"IAA",i.,"Carotenoids"),(B.,"Kinetin",ii.,"Terpenes"),(C.,"ABA",iii,"Indole compounds"),(iv,"GA3",iv.,"Adenine derivatives"):}

How many of the given characters are associated with brown algae (Laminarin, Sulphated phycocolloids, Apical flagella, Fucoxanthin, Heterokont flagellation, chlorophyll c, Carotenoids, Pear-shaped zoospores, Oogonium, Pyriform gametes, Most complex post- fertilization development)

Carotenoid pigments determine the colour of skin in man.

Which one of the following pairs is incorrectly matched {:(,(a),"Adenine derivative",-,"Kinetin"),(,(b),"Carotenoid derivative",-,"ABA"),(,(c ),"Terpenes",-,"IAA"),(,(d),"Indole compounds",-,IBA),(,(e),"Gas",-,"Ethylene"):}