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
Last Answer : Answer : C
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 : One round of Edman degradation of the peptide: H2N- Gly-Arg-Lys-Phe- Asp- COOH would result in which of the following structures or their phenyl isothiocyanate derivatives? (A) H2N-Gly-Arg-COOH + H2N-Lys- Phe- Asp- ... C) H2N-Arg-Lys-Phe-Asp-COOH + Gly (D) H2N-Gly-Arg-Lys-COOH + H2N-Phe -Asp-COOH
Description : Urea is represented as (A) NH2 .CO.NH2 (B) NH3CO.CH3 (C) NH.CO2 .NH (D) NH3 .CO2 .NH3
Last Answer : (A) NH2 .CO.NH2
Description : Malonyl-CoA reacts with the central (A) —SH group (B) —NH2 group (C) —COOH group (D) —CH2OH group
Last Answer : Answer : A
Description : Biuret reaction is specific for (A) –CONH-linkages (B) –CSNH2 group (C) –(NH)NH2 group (D) All of these
Description : Which of the following terms best describes the compound below? CH3(CH2)7CH=CH(CH2)7CO2H (a) an unsaturated fatty acid (b) a triglyceride (c) a synthetic detergent (d) a micelle
Last Answer : an unsaturated fatty acid
Description : Compound (A) reacts with sodium metal to form one mole of H2. The compound (A) can be (a) CH3CH2CH=CH2 (b) HOCH2CH2CH2CH2OH (c) CH=CH–CH=CH2 (d) CH3CH2CH2CH2OH
Last Answer : HOCH2CH2CH2CH2OH
Description : Compound in which carbons use only sp3 hybrid orbitals for bond formation is (a) CH3CH2CH3 (b) CH3C≡CH (c) CH3CH=CH2 (d) CH2=CH—CH=CH2
Last Answer : CH3CH2CH3
Description : How many geometrical isomers are possible for the given compound? Ph-CH=CH-CH=CH-COOH
Last Answer : How many geometrical isomers are possible for the given compound? Ph-CH=CH-CH=CH-COOH A. 2 B. 4 C. 6 D. 8
Description : NH+ 4 aminates glutamate to form glutamine requiring ATP and (A) K+ (B) Na+ (C) Ca++ (D) Mg++
Last Answer : Answer : D
Description : What is the functional group in an alcohol? (a) Carbon-carbon double bond (b) NH2 (c) OH (d) COOH
Last Answer : OH
Description : Buffering action of haemoglobin is mainly due to its (A) Glutamine residues (B) Arginine residues (C) Histidine residues (D) Lysine residues
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 : In N-linked glycoproteins, oligosaccharide is attached to protein through its (A) Asparagine residue (B) Glutamine residue (C) Arginine residue (D) Lysine residue
Description : The amino acids in which the R groups have a net positive charge at pH 7.0 are (A) Lysine, Arginine, Histidine (B) Lysine, Aspargine (C) Histidine, Aspargine (D) Glutamine, Arginine
Description : The amino acid which is not optically active is (A) Alanine (B) Glycine (C) Glutamine (D) Lysine
Last Answer : Answer : B
Description : Which of the following amino acid has been shown as one of the active site of phosphoglucomutase? (A) Lysine (B) Tyrosine (C) Serine (D) Histidine
Description : Activation or inactivation of certain key regulatory enzymes is accomplished by covalent modification of the amino acid: (A) Tyrosine (B) Phenylalanine (C) Lysine (D) Serine
Description : Carnitine is synthesized from (A) Lysine (B) Serine (C) Choline (D) Arginine
Description : One of the given example is an amino acid: (A) Oh-Lysine (B) Protein (C) Leucine (D) Serine
Description : An –OH group is present in the side chain of (A) Serine (B) Arginine (C) Lysine (D) Proline
Description : At neutral pH Alanine has the following structure: (A) − − 2 3 H H N C COOH CH (B) + 3 − − 3 H H N C COO CH (C) 2 − − 3 H H N C COO CH (D) + 2 − − 3 H H N C COO CH
Description : In the following reaction, Alanine acts as a 3 3 3 3 + + → H H | | H N – – COO —— H N – – COOH C C | | CH CH (A) Acid (B) Base (C) Zwitter ion (D) None of these
Description : . Chemical formula of biuret is (A) NH2 .CO.NH2 (B) NH3 .COO.NH3 (C) NH2CONHCONH2 (D) NH4COONH2
Last Answer : (C) NH2CONHCONH2
Description : Skeletal muscle breakdown produces predominantly liberation of which two amino acids? A. Lysine. B. Tyrosine. C. Alanine. D. Glutamine. E. Arginine.
Last Answer : Answer: CD DISCUSSION: Alanine is released from skeletal muscle and extracted by the liver, where it is converted to new glucose. Glutamine is also released from muscle and participates in ... these two amino acids account for approximately two thirds of the nitrogen released from skeletal muscle
Description : Sulphur containing amino acid (A)Lysine (B) Methionine (C)Glutamine (D) Glycine
Last Answer : (B) Methionine
Description : Is (CH2 — CH — C6H5 ) n a homo polymer or a copolymer.
Last Answer : Ans. It is a homo polymer and the monomer from which it is obtained in styrene C6H5 CH = CH2 .
Description : Which of the following compounds would react most rapidly in an SN2 reaction? (a) CH3CH2I (b) CH2=CH–I (c) (CH3)2CHI (d) (CH3)3CI
Last Answer : CH3CH2I
Description : How many σ (sigma) bonds are there in CH2=CH—CH=CH2? (a) 3 (b) 6 (c) 9 (d) 12
Last Answer : 9
Description : Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of (A) 4 kgf/cm2 & 500°C (B) 10 kgf/cm2 & 1000°C (C) 40 kg/cm2 & 200°C (D) 100 kgf/cm2 & 500°C
Last Answer : (A) 4 kgf/cm2 & 500°C
Description : What is the molecular formula of the compound CH2 with molar mass = 42.0?
Last Answer : Apex
Description : `CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH` This reaction is called
Last Answer : `CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH` This reaction is called
Description : The active site of an enzyme is formed by (A) R group of amino acids (B) NH2 group of amino acids (C) CO group of amino acids (D) Sulphur bonds which are exposed
Description : Consider the given compounds : (a) `CH_(3)-CH_(2)-NH_(2)` (b) `CH_(3)-CH=NH` (c ) `CH_(3)-C=N` (d) `C_(2)H_(5)-NH-C_(2)H_(5)` Arrange basicity of thes
Last Answer : Consider the given compounds : (a) `CH_(3)-CH_(2)-NH_(2)` (b) `CH_(3)-CH=NH` (c ) `CH_(3)-C=N` (d) `C_(2 ... `a gt d gt b gt c` D. `d gt a gt c gt b`
Description : The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H20O is an example of?
Last Answer : a condensation reaction
Description : The a-helix of proteins is (A) A pleated structure (B) Made periodic by disulphide bridges (C) A non-periodic structure (D) Stabilised by hydrogen bonds between NH and CO groups of the main chain
Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane
Last Answer : Benzene
Description : A vasodilating compound is produced by the decarboxylation of the amino acid: (A) Arginine (B) Aspartic acid (C) Glutamine (D) Histidine
Description : A compound normally used to conjugate bile acids is (A) Serine (B) Glycine (C) Glucoronic acid (D) Fatty acid
Description : The compound methylamine, H3C–NH2, contains a C–N bond. In this bond, which of the following best describes the charge on the nitrogen atom? (a) slightly positive (b) uncharged (c) slightly negative (d) –1
Last Answer : slightly negative
Description : Deficiency of urea cycle enzymes results into accumulation of citrulline argininosuccinate arginine in the liver resulting in increasing concentration of …….. in the blood. (A) Calcium (B) Sodium (C) Ammonia (D) Lipid
Description : Citrulline is an intermediate of (A) TCA cycle (B) Urea cycle (C) Pentose cycle (D) Calvin cycle
Description : The metabolite which sustains urea cycle is (A) Ornithine (B) Citrulline (C) Carbamoyl phosphate (D) n-acetyl glutamate
Description : An amino acid not involved in urea cycle is (A) Arginine (B) Histidine (C) Ornithine (D) Citrulline
Description : The amino acid which contains a guanidine group is (A) Histidine (B) Arginine (C) Citrulline (D) Ornithine
Description : ATP is required in following reactions of urea cycle: (A) Synthesis of carbamoyl phosphate and citrulline (B) Synthesis of citrulline and argininosuccinate (C) Synthesis of argininosuccinate and arginine (D) Synthesis of carbamoyl phosphate and argininosuccinate
Description : In urea synthesis, the amino acid functioning solely as an enzyme activator: (A) N-acetyl glutamate(B) Ornithine (C) Citrulline (D) Arginine