Description : Aromatic amino acids can be detected by (A) Sakaguchi reaction (B) Millon-Nasse reaction (C) Hopkins-Cole reaction (D) Xanthoproteic reaction
Last Answer : Answer : D
Description : Maple syrup urine diseases is an inborn error of metabolism of (A) Sulphur-containing amino acids (B) Aromatic amino acids (C) Branched chain amino acids (D) Dicarboxylic amino acids
Last Answer : Answer : C
Description : All the following are sulphur containing amino acids found in proteins except (A) Cysteine (B) Cystine (C) Methionine (D) Threonine
Last Answer : (D) Threonine
Description : Which of the following gives a positive Ninhydrin test? (A) Reducing sugar (B) Triglycerides (C) α-amino acids (D) Phospholipids
Description : All α-amino acids give positive (A) Million’s test (B) Biurete test (C) Xanthproteic test (D) Ninhydrine test
Description : The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct? - HN - CH - CO - NH - CH - CO - NH - CH - CO - ... -terminal amino acid and D is N-terminal amino acid. (d) A is a sulphur containing amino acid methionine.
Last Answer : (a) D is the acidic amino acid-glutamic acid.
Description : Proteins contain (A) Only L- α - amino acids (B) Only D-amino acids (C) DL-Amino acids (D) Both (A) and (B)
Last Answer : Answer : A
Description : Sulphur containing amino acids after catabolism produces a substance which is excreted: (A) SO2 (B) HNO3 (C) H2SO4 (D) H3PO4
Description : The third active process for amino acids transport involves (A) Acidic amino acids (B) Basic amino acids (C) Neutral amino acids (D) Sulphur containing amino acids
Description : Which of the following statement(s) is/are true concerning metabolic derangements in sepsis and the systemic inflammatory response syndrome which may follow progressive shock? a. Alterations in glucose ... The serum aromatic amino acids fall rapidly as they are actively used in oxidative metabolism
Last Answer : Answer: b, c A broad spectrum of metabolic abnormalities become apparent in sepsis and the systemic inflammatory response syndrome following shock. Disruption of the normal cycles of carbohydrate, ... acetyl coenzyme A. This results in reduced serum level of leucine, isoleucine and valine
Description : Which of the following statements is NOT correct : (a) Tollens' test is given by both aliphatic and aromatic aldehydes. (b) Fehling's test is given by aliphatic aldehydes. It is not given ... given by methyl ketones and acetaldehydes. (d) Lucas test is given by both aliphatic and aromatic aldehydes
Last Answer : Lucas test is given by both aliphatic and aromatic aldehydes
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 : Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product? (a) Small intestine : Proteins Pepsin → ... Trypsin → Monoglycerides (d) Small intestine : Starch α-Amylase → Disaccharide (maltose)
Last Answer : (d) Small intestine : Starch α-Amylase → Disaccharide
Description : Which of the following amino acids has an aliphatic R group? (a) Serine (b) Cysteine (c) Asparagine (d) Leucine
Last Answer : Leucine
Description : Will adrenaline give a positive xanthoproteic test?
Last Answer : yes
Description : Side chains of all following amino acids contain aromatic rings except (A) Phenyl alanine (B) Alanine (C) Tyrosine (D) Tryptophan
Last Answer : Answer : B
Description : Side chains of all amino acids contain aromatic rings except (A) Pheynl alanine (B) Alanine (C) Tyrosine (D) Tryptophan
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 : Give the names of aromatic amino acids.
Last Answer : Phenylalanine and tyrosine.
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 : A molecule of CO2 is captured by biotin when it acts as coenzyme for carboxylation reaction. The carboxyl group is covalently attached to (A) A nitrogen (N1) of the biotin molecule (B) Sulphur of thiophene ring (C) α-Amino group of lysine (D) α-Amino group of protein
Description : The fatty acids containing even number and odd number of carbon atoms as well as the unsaturated fatty acids are oxidized by (A) α-oxidation (B) β-oxidation (C) ω-oxidation (D) All of these
Description : What is the difference between aliphatic compounds and aromatic compounds ?
Last Answer : aliphatic compounds 1. Aliphatic compounds are mainly free-chain. 2. Aliphatic compounds can be saturated or unsaturated. 3. Aliphatic compounds have low carbon content. 4. Replacement reactions ... compounds. 5. Aromatic halides are relatively less active. . Aromatic hydroxy compounds are acidic.
Description : Wax used for making candle is chemically a mixture of – (1) aliphatic hydrocarbons (2) aromatic hydrocarbons (3) cyclic hydrocarbons (4) aliphatic and aromatic hydrocarbons
Last Answer : (1) aliphatic hydrocarbons Explanation: An aliphatic compound is a hydrocarbon compound containing carbon and hydrogen joined together in straight chains, branched trains or non-aromatic rings ... naturally occurring. Waxes are organic compounds that characteristically consist of long alkyl chains.
Description : Pick out the wrong statement regarding the solubility characteristics of high polymers. (A) Greater the degree of cross-linking in the polymer, lesser is its solubility (B) Polymers having more ... of the solvent (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Last Answer : (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Description : Coal tar (produced by high temperature carbonisation) is the main source of (A) Aromatic compounds (B) Aliphatic compounds (C) Paraffins (D) Olefins
Last Answer : (A) Aromatic compounds
Description : The diazonium salts are the reaction products of the reaction of nitrous acid with (a) primary aliphatic amines (b) primary aromatic amines (c) secondary aliphatic amines (d) secondary aromatic amines
Last Answer : primary aromatic amines
Description : Coal-tar is the main source of : (a) Aromatic compounds (b) Aliphatic compounds (c) Heterocyclic compounds (d) None of these
Last Answer : Aromatic compounds
Description : Wax used for making candle is chemically a mixture of (1) aliphatic hydrocarbons (2) aromatic hydrocarbons (3) cyclic hydrocarbons (4) aliphatic and aromatic hydrocarbons
Last Answer : aliphatic hydrocarbons
Description : An example of α-amino acid not present in proteins but essential in mammalian metabolism is (A) 3-Amino 3-hydroxypropanoic acid (B) 2-Amino 3-hydroxybutanoic acid (C) 2-Amino 4-mercaptobutanoic acid (D) 2-Amino 3-mercaptopropanoic acid
Description : What is the basis of xanthoproteic test?
Last Answer : The ring systems in phenyl alanine, tyrosine and tryptophan will answer this test.
Description : Thyroid stimulating hormone is a dimer. The α-subunits of TSH, LH, FSH are identical. Thus the biological specificity must therefore be β subunit in which the number of amino acids is (A) 78 (B) 112 (C) 130 (D) 199
Description : All of the following intermediates of citric acid cycle can be formed from amino acids except (A) α-Ketoglutarate (B) Fumarate (C) Malate (D) Oxaloacetate
Description : Thiamin diphosphate is required for oxidative decarboxylation of (A) α-Keto acids (B) α-Amino acids (C) Fatty acids (D) All of these
Description : All α-amino acids have one asymmetric carbon atom except (A) Arginine (B) Glycine (C) Aspartic acid (D) Histidine
Description : α-helix is disrupted by certain amino acids like (A) Proline (B) Arginine (C) Histidine (D) Lysine
Description : Each turn of α-helix contains the number of amino acids (A) 2.8 (B) 3.2 (C) 3.4 (D) 3.6
Description : Ninhydrin with evolution of CO2 forms a blue complex with (A) Peptide bond (B) α-Amino acids (C) Serotonin (D) Histamine
Description : Will amino acids give a positive biuret test?
Last Answer : No. This needs a minimum of two peptide bonds.
Description : Chemically, lipoic acid is (A) Saturated fatty acid (B) Unsaturated fatty acid (C) Amino acid (D) Sulphur containing fatty acid
Description : Ethereal sulphate is synthesized from the _________ amino acid. (A) Neutral (B) Acidic (C) Basic (D) Sulphur containing
Description : The sulphur containing amino acid: (A) Homoserine (B) Serine (C) Methionine (D) Valine
Description : Sulphur-containing amino acid is (A) Glutathione (B) Chondroitin sulphate (C) Homocysteine (D) Tryptophan
Description : An example of sulphur containing amino acid is (A) 2-Amino-3-mercaptopropanoic acid (B) 2-Amino-3-methylbutanoic acid (C) 2-Amino-3-hydroxypropanoic acid (D) Amino acetic acid
Description : Sulphur containing amino acid is (A) Methionine (B) Leucine (C) Valine (D) Asparagine
Last Answer : (A) 2-Amino-3-mercaptopropanoic acid
Last Answer : (A) Methionine
Description : Altering the amino acid profile in total parenteral nutrition solutions can be of benefit in certain conditions. Which of the following conditions are associated with a benefit by supplementation with the ... c. Short gut syndrome and glutamine d. Chronic renal failure and essential amino acids
Last Answer : Answer: a, c In a number of conditions, altering the amino acid profile of the total parenteral nutrition solution can be of benefit. TPN with amino acids of high biologic value ... Glutamine-enriched TPN partially attenuates villous atrophy and may be useful in treatment of short gut syndrome
Description : A modified amino acid solution with increased equimolar branched-chain amino acids and decreased aromatic amino acids has been proposed for patients with hepatic insufficiency. Which of the following ... D. In some studies of surgical patients, improvements in mortality have been reported.
Last Answer : Answer: D DISCUSSION: The use of modified amino acid solutions is based on the false neurotransmitter hypothesis of the cause of hepatic coma. According to this hypothesis, the imbalance ... in a group of patients with cirrhosis, decreasing morbidity and showing a trend toward decreased mortality