Description : Group that reacts in the Biuret test: (A) Peptide (B) Amino group (C) Carboxylic group (D) Aldehyde group
Last Answer : Answer : A
Description : A protein reacts with biuret reagent which indicates 2 or more (A) Blood clotting (B) Peptide bond (C) Disulphide bonds (D) Hydrophobic bonds
Last Answer : Answer : B
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 : Sakaguchi reaction is specific for (A) Guanidine group (B) Phenolic group (C) Carboxylic group (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 : Which among the following has an imidazole group? (A) Histidine (B) Tryptophan (C) Proline (D) Hydroxy proline
Description : Indole group of tryptophan responses positively to (A) Glyoxylic acid (B) Schiff’s reagent (C) Biuret test (D) Resorcinol test
Description : What is peptide linkage?
Last Answer : What is the answer ?
Description : Which of the following is the main structural feature of proteins? (a) Peptide linkage (b) Ester linkage (c) Ether linkage (d) α,β-Linkage
Last Answer : Peptide linkage
Description : One of the following has a phenolic group: (A) Histidine (B) Hydroxy lysine (C) Seratonine (D) Hydroxy proline
Last Answer : Answer : C
Description : Will amino acids give a positive biuret test?
Last Answer : No. This needs a minimum of two peptide bonds.
Description : In biotin-containing enzymes, the biotin is bound to the enzyme by (A) An amide linkage to carboxyl group of glutamine (B) A covalent bond with CO2 (C) An amide linkage to an amino group of lysine (D) An amide linkage to α-carboxyl group of protein
Description : Chymotrypsin is specific for peptide bonds containing (A) Uncharged amino acid residues (B) Acidic amino acids (C) Basic amino acid (D) Small amino acid residues
Description : The enzyme trypsin is specific for peptide bonds of (A) Basic amino acids (B) Acidic amino acids (C) Aromatic amino acids (D) Next to small amino acid residues
Description : A degree of control over the speed of a slip ring induction motor can be obtained by _____________. A. adjusting governor linkage B. changing the number of phases to the motor C. inserting resistance into the stator circuit D. inserting resistance into the rotor circuit
Last Answer : Answer: D
Description : Can I mix Calcium Hypochlorite with Benomyl imidazole?
Last Answer : I have no idea but regular spraying with diluted bleach will keep algae and mildew away without the need for a chemistry degree. LOL On what and where is this mysterious algae and mildew problem occurring, is it indoors or outdoors?
Description : The imidazole drugs are of value for treating a. Viral diseases. b. Protozoal diseases and bacterial diseases. c. Bacterial diseases. d. Fungal diseases.
Last Answer : d. Fungal diseases
Description : The most probable mechanism of action of imidazole antifungal drugs is: A. They bind to ergosterol in fungal cell membrane and make it leaky B. They interfere with ergosterol synthesis by fungi C. They interfere with fungal mitosis D. They block oxidative phosphorylation in fungi
Last Answer : B. They interfere with ergosterol synthesis by fungi
Description : Deterioration of food (rancidity) is due to presence of (A) Cholesterol (B) Vitamin E (C) Peroxidation of lipids (D) Phenolic compounds
Description : What samples gives a positive test with biuret test?
Last Answer : Biuret test is for peptide bonds.
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 : The useful reagent for detection of amino acids is (A) Molisch reagent (B) Dichlorophenol Indophenol (C) Ninhydrin (D) Biuret
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 : The movement of a gene from one linkage group to another is called (a) translocation (b) crossing over (c) inversion (d) duplication
Last Answer : (c) inversion
Description : The mechanism that causes a gene to move from one linkage group to another is called (a) inversion (b) duplication (c) translocation (d) crossing-over.
Last Answer : (c) translocation
Description : Which of the following statement(s) is/are true concerning translation of the mRNA message to protein synthesis? a. An adaptor molecule, tRNA, recognizes specific nucleic acid bases and unites them ... and the free amino acid occurs in the free cytoplasm d. Complete protein synthesis takes hours
Last Answer : Answer: a, b The synthesis of protein involves conversion from a four-letter nucleotide language to one of 20 chemically distinct amino acids. This process is referred to as ... translation and be moving down the mRNA molecules simultaneously, thus increasing the rate of protein synthesis
Description : Ultraviolet light can damage a DNA strand causing (A) Two adjacent purine residue to form a covalently bounded dimer (B) Two adjacent pyrimidine residues to form covalently bonded dimer (C) Disruption of phosphodiesterase linkage (D) Disruption of non-covalent linkage
Description : The carbon of the pentose in ester linkage with the phosphate in a nucleotide structure is (A) C1 (B) C3 (C) C4 (D) C5
Last Answer : Answer : D
Description : A dissaccharide formed by 1,1-glycosidic linkage between their monosaccharide units is (A) Lactose (B) Maltose (C) Trehalose (D) Sucrose
Last Answer : B
Last Answer : C
Description : The monosaccharide units are linked by 1 → 4 glycosidic linkage in (A) Maltose (B) Sucrose (C) Cellulose (D) Cellobiose
Last Answer : A
Description : What is the glycosidic linkage in sucrose?
Last Answer : 1-2 linkage.
Description : What is the glycosidic linkage in lactose?
Last Answer : Beta 1-4 linkage.
Description : Plexiglass (also called Lucite) because of its high optical transparency is used for making lenses. It is chemically (A) Polymethyl methacrylate (PMMA) (B) Polytetrafluroethylene (PTFE) (C) Polycarbonates (D) Phenolic resins
Last Answer : (A) Polymethyl methacrylate (PMMA)
Description : Which of the following polymers shows the highest anti-tacking properties? (A) Melamine formaldehyde resin (B) Phenolic resin (C) Epoxy resin (D) Alkyd resin
Last Answer : (A) Melamine formaldehyde resin
Description : Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces (A) Epoxy resin (B) Polyamide (C) Alkyd resin (D) Phenolic resin
Last Answer : (C) Alkyd resin
Description : Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin. (A) Resorcinol (B) Phenol (C) Para-cresol (D) Melamine
Last Answer : (D) Melamine
Description : Cation exchange resins used in water treatment is made from __________ resin. (A) Urea formaldehyde (B) Epoxy (C) Amino (D) Phenolic
Last Answer : (A) Urea formaldehyde
Description : __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine. (A) Epoxy (B) Amino (C) Alkyd (D) Phenolic
Last Answer : (B) Amino
Description : The chemical nature of GA3 is (a) Phenolic (b) Terpene (c) Purine (d) Indole
Last Answer : (b) Terpene
Description : Which of the following is not an inhibitory substance governing seed dormancy? (a) Gibberellic acid (b) Abscisic acid (c) Phenolic acid (d) Para-ascorbic acid
Last Answer : a) Gibberellic acid
Description : The cooling medium used in dry quenching of coke is (A) Nitrogen (B) Air (C) Phenolic water (D) Carbon dioxide
Last Answer : (A) Nitrogen
Description : Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by (A) Chlorination (B) Treating in biological oxygen pond (C) Chemical coagulation (D) None of these
Last Answer : (B) Treating in biological oxygen pond
Description : Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by (A) Quenching of hot coke (B) Discharging in the river stream (C) Filtration and recycling for cooling coke oven gas (D) None of these
Last Answer : (A) Quenching of hot coke
Description : Phenolic antiseptics are added in the __________ soap. (A) Shaving (B) Medicated (C) Metallic (D) Transparent
Last Answer : (B) Medicated