Biuret reaction is specific for (A) –CONH-linkages (B) –CSNH2 group (C) –(NH)NH2 group (D) All of these

1 Answer

Answer :

Answer : A

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Description : Digestion of proteins involves (a) changes in secondary structure only (b) cleavage of peptide linkages (c) removal of all carboxyl groups in the form of CO2. (d) removal of all NH2 groups in the form of NH3

Last Answer : cleavage of peptide linkages

Description : . Chemical formula of biuret is (A) NH2 .CO.NH2 (B) NH3 .COO.NH3 (C) NH2CONHCONH2 (D) NH4COONH2

Last Answer : (C) NH2CONHCONH2

Description : Urea is represented as (A) NH2 .CO.NH2 (B) NH3CO.CH3 (C) NH.CO2 .NH (D) NH3 .CO2 .NH3

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Description : Biuret test is specific for (A) Two peptide linkage (B) Phenolic group (C) Imidazole ring (D) None of these

Last Answer : Answer : A

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Description : Malonyl-CoA reacts with the central (A) —SH group (B) —NH2 group (C) —COOH group (D) —CH2OH group

Last Answer : Answer : A

Description : Indole group of tryptophan responses positively to (A) Glyoxylic acid (B) Schiff’s reagent (C) Biuret test (D) Resorcinol test

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Description : Group that reacts in the Biuret test: (A) Peptide (B) Amino group (C) Carboxylic group (D) Aldehyde group

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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 : Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) ... NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

Last Answer : the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation

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Description : Chymotrypsin in the small intestine hydrolyzes peptide linkages containing (A) Alanine (B) Pheynl alanine (C) Valine (D) Methionine

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Description : In small intestine trypsin hydrolyzes peptide linkages containing (A) Arginine (B) Histidine (C) Serine (D) Aspartate

Last Answer : Answer : A

Description : The hydrogen bonds between peptide linkages are interfered by (A) Guanidine (B) Uric acid (C) Salicylic acid (D) Oxalic acid

Last Answer : Answer : A

Description : The hydrogen bonds between peptide linkages of a protein molecules are interfered by (A) Guanidine (B) Uric acid (C) Oxalic acid (D) Salicylic acid

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Description : A dissaccharide linked by α-1-4 Glycosideic linkages is (A) Lactose (B) Sucrose (C) Cellulose (D) Maltose

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Description : Cysteine has the formula: (A) CH3SH (B) H2N—CH2—COOH (C) HS—CH2—CH(NH2)—COOH (D) S—CH2—CH(NH2)—COOH | S—CH2—CH(NH2)—COOH

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Description : What are the Reaction of amino acid using ninhydrin and biuret reagent?

Last Answer : What is the answer ?

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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

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Description : The useful reagent for detection of amino acids is (A) Molisch reagent (B) Dichlorophenol Indophenol (C) Ninhydrin (D) Biuret

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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 : Will amino acids give a positive biuret test?

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Description : In the given reaction `CH_(3)-CH_(2)-NH-CH_(2)-CH_(2)-CI overset((i)CH_(3)I ("excess"))underset((ii)AgOH//Delta)rarr[X]` is the major product, [X] wil

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Last Answer : How many S - O single bond linkages are present in peroxodisulphuric acid?

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