ABC26OR0109 · Among the following, the natural product that is a steroid and contains an alpha , beta -unsaturated ketone is · JUNE 2017
ABC26OR0111 · The following natural product Enterodiol is a · DEC 2017
Amino Acids Peptides
ABC26OR0076 · Match the amino acids with their structures: · DEC 2011
ABC26OR0077 · Among the following, the amino acid which is basic in nature is: · JUNE 2012
ABC26OR0080 · A tripeptide gives the following products on Edman degradation. + The tripeptide is · DEC 2012
ABC26OR0091 · Reaction of the dipeptide, given below, with hydrogen in the presence of 10% palladium over carbon, produces a mixture of · JUNE 2013
ABC26OR0093 · The constituent amino acids present in the following dipeptide, respectively, are · DEC 2013
ABC26OR0096 · The peptide A on reaction with 1-fluoro-2, 4-dinitrobenzene followed by exhaustive hydrolysis gave phenylalanine, alanine, serine and N-(2… · DEC 2013
ABC26OR0099 · The amino acid constituents of artificial sweetener given below are · DEC 2014
ABC26OR0114 · For the successful synthesis of peptide linkage leading to the product A, the side chain of the amino acid D should have · DEC 2017
ABC26OR0110 · The major product formed in the reaction of D-glucose with ZnCl2 in MeOH is a methyl glucopyranoside (A or B). The structure of this… · JUNE 2017
ABC26OR0115 · Reaction of D - glucose with following reagents produces Reagents: 1. Acetone, H+; 2. PDC ; 3 (EtO)2 P(O) CH2 CO2 Et, NaH · JUNE 2018self-practice
ABC26OR1105 · Reaction of D - glucose with following reagents produces Reagents: 1. Acetone, H+; 2. P D C ; ~ 3 . ~(EtO)2 P(O) CH2 CO2 Et, NaH · JUNE 2018self-practice
Natural Products & – General
ABC26OR0485 · beta -D-Glucose is represented as · 2000-2022
ABC26OR0792 · In the scheme shown above (P), (Q), (R) and (S) are · 2005-2022
ABC26OR0793 · Match the isoelectric point with the amino acids. · 2005-2022
ABC26OR0487 · Which one of the following compunds will form as osazone derivative? · 2000-2022
ABC26OR0794 · A dipeptide on hydrolysis gives two amino acids (X) and (Y). If the dipeptide is first treated with HNO2 and then hydrolysis is carried… · 2005-2022self-practice
ABC26OR0488 · D-Glucose and D-fructose interconvert into each other in aqueous alkaline solution. Suggest a mechanism for the interconversion. · 2000-2022self-practice
ABC26OR0795 · The complementary strand of DNA for the following single stranded DNA sequence, 5-A-T-C-A-T-G-C-3 is · 2005-2022
ABC26OR0489 · Proteins are biopolymers. The monomer units present in them are · 2000-2022
ABC26OR0796 · 5(a) For the following scheme of transformations, draw the structures of A, B, C and D. (b) Complete hydrolysis of a pentapeptide with 6N… · 2005-2022
ABC26OR0490 · Identify the structure of the major product formed in the following reaction, and give a mechanism of its formation. · 2000-2022self-practice
ABC26OR0797 · A disaccharide K gives a silver mirror with Tollen's reagent. Treatment of K with MeOH / HCl gives a monomethyl derivative L , which does… · 2005-2022self-practice
ABC26OR0491 · For the aldotetroses I-IV, the combination of TRUE statements, among P - T, is: I II III IV P = I and II are diastereomers and II and III… · 2000-2022
ABC26OR0798 · The structure of D-galactose is Which one of these structures is L-galactose? · 2005-2022
ABC26OR0492 · Three molecular ionic states, P-R, are possible for the amino acid histidine. Identify the correct choice of pH values, respectively, for… · 2000-2022
ABC26OR0799 · Predict the product in each of the following reactions. · 2005-2022self-practice
ABC26OR0493 · The pKa values for the three ionizable groups X, Y and Z of glutamic acid are 4.3, 9.7 and 2.2 respectively. The isoelectric point for the… · 2000-2022
ABC26OR0800 · Calculate the isoelectric point (p.I.) of lysine, given the pKa of alpha .NH3 is 8.95, pKa of side chain NH3 is 10.53 and pKa of alpha… · 2005-2022
ABC26OR0494 · contain a Statement with a Reason and an Assertion. For each question, choose the correct answer from the following four choices… · 2000-2022
ABC26OR0801 · The absolute configurations at the two chiral centers in D-Ribulose are · 2005-2022
ABC26OR0495 · contain a Statement with a Reason and an Assertion. For each question, choose the correct answer from the following four choices… · 2000-2022
ABC26OR0802 · The correct relationship within each pair of the natural products is: · 2005-2022
ABC26OR0496 · Match the following compounds with their respective classes. I. II. III. IV. · 2000-2022
ABC26OR0803 · The INCORRECT statement in the following is: · 2005-2022
ABC26OR0497 · Identify the Correct set of stereochemical relationships amongst the following monosaccharides I-IV I II III IV · 2000-2022
ABC26OR0804 · The Haworth projection for alpha -anomer of D-glucose is · 2005-2022
ABC26OR0498 · Select the correct pair of statements: (I) Complementary strands run antiparallel in a double stranded DNA. (II) The triplet codons… · 2000-2022
ABC26OR0805 · The complementary DNA sequence of the given DNA 5'-G-A-A-T-T-C-3' is: · 2005-2022
ABC26OR0499 · Sucrose is converted to a mixture of glucose and fructose in a pseudo first order process under alkaline condi tions. The reaction has a… · 2000-2022
ABC26OR0806 · The correct C3 epimeric pair of the following is · 2005-2022
ABC26OR0500 · The mono protonation of adenine (X) in acidic solution (X) mainly occurs at · 2000-2022
ABC26OR0807 · alpha -Farnesene shown below is a · 2005-2022