Failure in which of the following phenomenon would result in linkage?

#Question id: 10789

#Section 6: Plant, Animal and Microbial Biotechnology

Trans-cinnamic acid, p-coumaric acid, and their derivatives are simple phenolic compounds known as

#Question id: 10790

#Section 6: Plant, Animal and Microbial Biotechnology

chalcone synthase (CHS) involved in biosynthesis of phenolic compound in plants. Following are some statements regarding the action of CHS;

 a) Chalcone synthase catalyzes the conversion of p-Coumaroyl-CoA into Chalcones

 b) Substrate for Chalcone synthase is chalcone

 c) CHS activity increased by environmental factors, such as light, and fungal infection

 d) Chalcone synthase is enzyme in flavonoid biosynthesis catalyzes stepwise condensation into p-Coumaric acid by using Malonyl-CoA molecules

 Which of the following combinations of above statement is true?

#Question id: 10791

#Section 6: Plant, Animal and Microbial Biotechnology

Following are certain statements regarding furanocoumarins;

 a) furanocoumarins have an attached furan ring

 b) These compounds are toxic until they are activated by sunlight in the ultraviolet A (UV-A) region (320–400 nm)  

 c) Light activated furanocoumarins can insert themselves into the double helix of DNA and bind to the pyrimidine bases, thus blocking transcription and repair and leading eventually to cell death   

 d) Phototoxic furanocoumarins are especially abundant in members of the Umbelliferae family, including celery, parsnip, and parsley.

 Which of the following combination from the above statements is correct?

#Question id: 10792

#Section 6: Plant, Animal and Microbial Biotechnology

Compounds such as caffeic acid and ferulic acid occur in soil in appreciable amounts and have been shown,

#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?