#Question id: 10793
#Section 6: Plant, Animal and Microbial Biotechnology
Hydroxyl groups (−OH), and methoxy groups(−OCH3) modification provides colour variations in case of
#Question id: 10794
#Section 6: Plant, Animal and Microbial Biotechnology
Which one of the following characteristics of about lignin is incorrect?
#Question id: 10795
#Section 6: Plant, Animal and Microbial Biotechnology
basic carbon skeleton of a flavonoid contains 15 carbons arranged in two aromatic rings connected by a three-carbon bridge. This structure results from two separate biosynthetic pathways:
#Question id: 10796
#Section 6: Plant, Animal and Microbial Biotechnology
Flavonoids are one of the largest classes of plant
phenolics, structure of flavonoids;
#Question id: 10797
#Section 6: Plant, Animal and Microbial Biotechnology
The colored pigments of plants are of two principal types: carotenoids and flavonoids. Given below some statements of about these pigments;
a) Anthocyanins
are colored flavonoids that attract animals
b) Flavonoids are phenolic compounds that include a
wide range of colored substances
c) Carotenoids are coloured terpenoid compounds that
also serve as accessory pigments in photosynthesis
d) most widespread group of pigmented carotenoids is
the anthocyanins, these are glycosides that have sugars. Without their sugars,
anthocyanins are known as anthocyanidins
Which of the following is incorrect statements of these pigments;
#Question id: 10798
#Section 6: Plant, Animal and Microbial Biotechnology
Two other major groups of flavonoids found in flowers
and leaves of all green plants. The function of these two flavonoids in plants
are____
a) protect plants against being eaten by herbivores
and against being infected by microbial pathogens
b)
Protect cells from excessive UV-B radiation (280–320 nm) because they
accumulate in the epidermal layers of leaves and stems and absorb light
strongly in the UV-B region
c)
flavones and flavonols secreted into the soil by legume roots mediate the
interaction of legumes and nitrogen-fixing symbionts
d) They are are coloured terpenoid compounds that also
serve as accessory pigments in photosynthesis
Which of the following combination from the above statements is correct?