Description : What are the Reaction of amino acid using ninhydrin and biuret reagent?
Last Answer : What is the answer ?
Description : Ascorbic acid can reduce (A) 2, 4-dinitro benzene (B) 2, 6-Dichlorophenol Indophenol (C) 2, 4-dibromobenzene (D) 2, 6-dibromo benzene
Last Answer : Answer : B
Description : Ascorbic acid can reduce (A) 2, 6-Dibromobenzene (B) 2, 6-Diiodoxypyridine (C) 2, 6-Dichlorophenol indophenol (D) 2, 4-Dinitrobenzene
Last Answer : Answer : C
Description : The viability of seeds is tested by (a) 2, 6 dichlorophenol indophenol (b) 2, 3, 5 triphenyl tetrazolium chloride (c) DMSO (d) Safranine.
Last Answer : b) 2, 3, 5 triphenyl tetrazolium chloride
Description : Ascorbic acid can reduce A) 2, 4-dinitro benzene (B) 2, 6-Dichlorophenol Indophenol (C) 2, 4-dibromobenzene (D) 2, 6-dibromo benzene
Last Answer : (B) 2, 6-Dichlorophenol Indophenol
Description : The sequence of amino acids in human growth hormone and the synthesis were done by (A) Sanger (B) Krebs (C) Chah Holi (D) Molisch
Description : Which of the following gives a positive Ninhydrin test? (A) Reducing sugar (B) Triglycerides (C) α-amino acids (D) Phospholipids
Description : Ninhydrin with evolution of CO2 forms a blue complex with (A) Peptide bond (B) α-Amino acids (C) Serotonin (D) Histamine
Description : The general test for detection of carbohydrates is (A) Iodine test (B) Molisch test (C) Barfoed test (D) Osazone test
Last Answer : B
Description : Sanger’s reagent contains (A) Phenylisothiocyanate (B) Dansyl chloride (C) 1-Fluoro-2, 4-dinitrobenzene (D) Ninhydrin
Description : Primary structure of proteins can be determined by the use of (A) Electrophoresis (B) Chromatography (C) Ninhydrin (D) Sanger’s reagent
Last Answer : Answer : D
Description : Will amino acids give a positive biuret test?
Last Answer : No. This needs a minimum of two peptide bonds.
Description : Grignard reagent is chemically known as (A) Ethyl magnesium chloride (B) Methyl magnesium chloride (C) Dichlorophenol (D) Monochloroacetic acid
Last Answer : (A) Ethyl magnesium chloride
Description : A protein solution on warming with concentrated HNO3 may turn yellow. This test is called : (a) Xanthoproteic test (b) Ninhydrin test (c) Biuret test (d) Million's test
Last Answer : Xanthoproteic test
Description : Which of the following tests is not used for testing proteins? (a) Ninhydrin test (b) Biuret test (c) Xanthoproteic test (d) Tollens' test
Last Answer : Tollens' test
Description : A protein reacts with biuret reagent which indicates 2 or more (A) Blood clotting (B) Peptide bond (C) Disulphide bonds (D) Hydrophobic bonds
Description : Indole group of tryptophan responses positively to (A) Glyoxylic acid (B) Schiff’s reagent (C) Biuret test (D) Resorcinol test
Last Answer : Answer : A
Description : Proteins react with biuret reagent which is suggestive of 2 or more (A) Hydrogen bonds (B) Peptide bonds (C) Disulphide bonds (D) Hydrophobic bonds
Description : N-terminal amino acids of a polypeptide are estimated by (A) Edmann reaction (B) Sanger’s reagent (C) Formaldehyde test (D) Ninhydrine reaction
Description : The amino acid which gives yellow colour with Ninhydrin in paper chromatography is (A) Tyrosine (B) Proline (C) Tryptophan (D) Alanine
Description : Group that reacts in the Biuret test: (A) Peptide (B) Amino group (C) Carboxylic group (D) Aldehyde group
Description : Sodium nitroprusside `Na_(2)[Fe(CN)_(5)NO]` is used as a reagent for the detection of
Last Answer : Sodium nitroprusside `Na_(2)[Fe(CN)_(5)NO]` is used as a reagent for the detection of A. sulphur B. nitrogen C. bromine D. iodine.
Description : A compound gives a positive Tollens' test but negative Ninhydrin test. It is (a) a protein (b) an amino acid (c) a monosaccharide (d) pyridine
Last Answer : a monosaccharide
Description : Specific test for ketohexoses: (A) Seliwanoff’s test (B) Osazone test (C) Molisch test (D) None of these
Last Answer : A
Description : The purple ring of Molisch reaction is due to (A) Furfural (B) Furfural + α Napthol (C) °C Napthol (D) Furfurol + H2SO4 + α -Naphthol
Description : Reabsorption of useful substances back into the blood from the filtrate in a nephron occurs in or In which part of kidney, Glucose and amino acids are
Last Answer : Reabsorption of useful substances back into the blood from the filtrate in a nephron occurs in or In ... of Henle D. Ascending limb of loop of Henle
Description : Ninhydrin reaction gives a purple colour and evolves CO2 with (A) Peptide bonds (B) Histamine (C) Ergothioneine (D) Aspargine
Description : Which of the followings gives a positive test for Ninhydrin? (A) Reducing sugars (B) Triglycerides (C) Alpha aminoacids (D) Esterified Fats
Description : Do proteins give a color with ninhydrin?
Last Answer : Proteins do not give a true color reaction; but N- terminal end amino group of protein will react with ninhydrin, to produce a blue color.
Description : What is the importance of ninhydrin reaction?
Last Answer : It is used for qualitative test and quantitative es- timation of amino acids. It is often used for detec- tion of amino acids in chromatography.
Description : What is ninhydrin reaction?
Last Answer : All amino acids when heated with ninhydrin will give a pink colour.
Description : The term, allelopathy was given by a). Rice b). Molisch c). Decondole d). Democritus
Last Answer : b). Molisch
Description : The term allelopathy was given by a). Rice (1974) b). Molisch (1937) c). Decondole (1832) d). Molisch (1930)
Last Answer : b). Molisch (1937)
Description : Biuret test is specific for (A) Two peptide linkage (B) Phenolic group (C) Imidazole ring (D) None of these
Description : Biuret reaction is specific for (A) –CONH-linkages (B) –CSNH2 group (C) –(NH)NH2 group (D) All of these
Description : What is the disadvantage of biuret method?
Last Answer : The sensitivity of the method is less and is un- suitable for estimation of proteins in milligram or microgram quantities.
Description : What is the advantage of biuret method?
Last Answer : The biuret method is simple one step process, and is the most widely used method for plasma pro- tein estimations.
Description : What is biuret?
Last Answer : The name is derived from the compound biuret, a condensation product of two urea molecules, which also gives a positive color test.
Description : What is the use of biuret reaction?
Last Answer : This reaction can be used for qualitative identifi- cation and quantitative estimation of proteins.
Description : What is biuret reaction?
Last Answer : Cupric ions in alkaline medium form a violet colour with peptide bond nitrogen.
Description : Which is useful in the detection of landmines?
Last Answer : Wasp
Description : Which of the following function is useful in system requiring error detection and correction codes ? (A) AND-OR (B) OR (C) AND (D) Exclusive -OR
Last Answer : Which of the following function is useful in system requiring error detection and correction codes ? (A) AND-OR (B) OR (C) AND (D) Exclusive -OR
Description : Calcium absorption is inferred by (A) Fatty acids (B) Amino acids (C) Vitamin D (D) Vitamin B12
Description : Degeneracy of the genetic code denotes the existence of (A) Base triplets that do not code for any amino acids (B) Codons consisting of only two bases (C) Codons that include one or more of the unusual bases (D) Multiple codons for a single amino acid
Description : Selectins are proteins that can recognise specific (A) Carbohydrates (B) Lipids (C) Amino acids (D) Nucleotides
Description : Glycoproteins are marked for destruction by removal of their (A) Oligosaccharide prosthetic group (B) Sialic acid residues (C) Mannose residues (D) N-terminal amino acids
Description : All the following statements about recognition of a codon on mRNA by an anticodon on tRNA are correct except (A) The recognition of the third base of the codon is not very precise (B) ... degeneracy of the genetic code (D) Wobble results in incorporation of incorrect amino acids in the protein
Description : All of the following statements about nonsense codons are true except (A) They do not code for amino acids (B) They act as chain termination signals (C) They are identical in nuclear and mitochondrial DNA (D) They have no complementary anticodons
Description : Genetic code is said to be degenerate because (A) It can undergo mutations (B) A large proportion of DNA is non-coding (C) One codon can code for more than one amino acids (D) More than one codons can code for the same amino acids
Description : Introns in genes (A) Encode the amino acids which are removed during post-translational modification (B) Encode signal sequences which are removed before secretion of the proteins (C) Are the non-coding sequences which are not translated (D) Are the sequences that intervene between two genes