Phenyl-methane-sulfonyl-fluoride (PMSF) inactivates serine proteases by binding covalently to the catalytic serine residue at the active site; this enzyme-inhibitor bond is not cleaved by the enzyme.  This is an example of what kind of inhibition?

#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?

#Question id: 10799

#Section 6: Plant, Animal and Microbial Biotechnology

Arabidopsis thaliana mutants that lack the enzyme chalcone synthase____

#Question id: 10800

#Section 6: Plant, Animal and Microbial Biotechnology

Which of the following secondary metabolites causes infertility in the

#Question id: 10801

#Section 6: Plant, Animal and Microbial Biotechnology

Which one is not the Functions of isoflavonoid___

#Question id: 10802

#Section 6: Plant, Animal and Microbial Biotechnology

Condensed tannins are the polymerizing subunits of__

#Question id: 10803

#Section 6: Plant, Animal and Microbial Biotechnology

Which of the following are not consider as nitrogen-containing secondary metabolites?