Natural Products
86 questions in this chapter, page 1 of 2.
Study loop for Natural Products
1. Practise the PYQsPrevious-year questions, with answers
Alkaloids
ABC26OR0081 · Match the following · DEC 2012
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
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
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
Carbohydrates
ABC26OR0110 · The major product formed in the reaction of D-glucose with 2 ZnCl in MeOH is a methyl glucopyranoside (A or B). The structure of this… · JUNE 2017
Natural Products & – General
ABC26OR0485 · beta -D-Glucose is represented as · 2000-2022
ABC26OR0792 · DNA Ba(OH)2 (P) ↓ MgO/ Delta PO43- + (Q) HCl (R) + (S) + sugar 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
ABC26OR0488 · D-Glucose and D-fructose interconvert into each other in aqueous alkaline solution. Suggest a mechanism for the interconversion. · 2000-2022 self-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
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
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.COOH… · 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
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
ABC26OR0807 · alpha -Farnesene shown below is a · 2005-2022
ABC26OR0501 · Treatment of the pentapeptide Gly-Arg-Phe-Ala-Ala, in separate experiments, with the enzymes Trypsin, Chemotrypsin and Carboxypeptidase A… · 2000-2022
ABC26OR0502 · In the reaction, (X) + Acetone + 2 Formaldehyde Compound X is · 2000-2022 self-practice
ABC26OR0810 · Which one of the following statements is Correct? · 2005-2022
ABC26OR0504 · Cyanogen bromide (CNBr) specifically hydrolyses the peptide bond formed by the C–side of · 2000-2022
ABC26OR0811 · Tollen's test will be negative for: · 2005-2022
ABC26OR0505 · In the following reaction, D - Glyceraldehyde X + Y (2 diastereomers) The absolute configurations of the chiral centres in X and Y are · 2000-2022
ABC26OR0813 · Specific rotations of freshly prepared aqueous solutions of I and II are +112 and +18.7, respectively. On standing the optical rotation of… · 2005-2022
ABC26OR0814 · The pKa values of lysine are 2.18, 8.95 and 10.79. The isoelectric point of lysine is ____ IIT JAM 2016 · 2005-2022
ABC26OR0508 · The decreasing order of isoelectric point for the following alpha -amino acids is Lysine (I), Alanine (II), Glutamic acid (III) · 2000-2022
ABC26OR0815 · The most basic amino acid among the following is · 2005-2022
ABC26OR0510 · The sequence of an mRNA molecule produced from a DNA template strand with the composition 5'–AGCTACACT–3' is · 2000-2022
ABC26OR0511 · Number of thymine residues in a 5000 kb DNA containing 23% guanine residues is: · 2000-2022
ABC26OR0818 · The maximum number of dipeptides that could be obtained by reaction of phenylalanine with leucine is ____ · 2005-2022
ABC26OR0512 · A disaccharide that will not given Benedict's test and will not form osazone is · 2000-2022
ABC26OR0819 · The number of reducing sugars among the following is ____ · 2005-2022
ABC26OR0820 · The C-2 epimer of D-glucose is · 2005-2022