Chemistry of natural products

Chemistry of natural products: Carbohydrates, proteins and peptides, fatty acids, nucleic acids, terpenes, steroids and alkaloids. Biogenesis of terpenoids and alkaloids.

YEAR JUN-2016 DEC-2015 JUN-2015 DEC-2014 JUN-2014 DEC-2013 JUN-2013 DEC-2012 JUN-2012 DEC-2011 JUN-2011
No.of questions appeared 4 3 3 3 5 7 6 7 4 2 3

1.Among the following, the compound(s) that can be classified as terpene derivative is (are)

terpinoids-csir-ugc-net-chemical-sciences

(1) A and B

(2) A only

(3) B only

(4) B and C

 

2.The major product formed in the following reaction is 

reduction-reagents-csir-ugc-net-chemical-sciences

 

3.The major product formed in the following reaction is….

carbohydrates-deprotection

 

4.At pH 10, tryptophan exists as

zwitter-ion

 

 

5.D-Mannose upon fluxing in acetone with CuSO4 and H2SO4 gives

5-natural-products-csir-net-gate-chemical-science-dec-2015

 

6.The correct match of the compound in column A with the description in column B is

6-natural-products-csir-net-gate-chemical-science-dec-2015

(1.) P-Y, Q-Z, R-X

(2.) P-Z, Q-X, R-Y

(3.) P-Z, Q-Y, R-X

(4.) P-X, Q-Z, R-Y

 

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