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
Last Answer : Answer : C
Description : Sulphydryl group of coenzyme a is contributed by (A) β-Alanine (B) β-Aminoisobutyric acid (C) Methionine (D) Thioethanolamine
Last Answer : Answer : D
Description : Sulphydryl group is present in (A) Cysteine (B) Methionine (C) Both (A) and (B) (D) None of these
Last Answer : Answer : A
Description : Which one of the following statements concerning glutamine is correct? (A) Contains three tetratable groups (B) Is classified as an acidic amino acid (C) Contains an amide group (D) Migrates to the cathode during electrophoresis at pH 7.0
Description : Enamine contains ……. a. double bond and amino group b. double bond and alcohol c. dounle bond and amide d. Diamines
Last Answer : a. double bond and amino group
Description : The nucleophilic attack on the esterified carboxyl group of the peptidyl-tRNA occupying the P site and the α-amino group of the new amino acyl tRNA, the number of ATP required by the amino acid on the charged tRNA is (A) Zero (B) One (C) Two (D) Four
Description : The α-amino group of the new amino acyl tRNA in the A site carries out a nucleophilic attack on the esterified carboxyl group of the peptidyl tRNA occupying the P site. This reaction is catalysed by (A) DNA polymerase (B) RNA polymerase (C) Peptidyl transferase (D) DNA ligase
Description : The enzyme amino acyl tRNA synthetase is involved in (A) Dissociation of discharged tRNA from 80S ribosome (B) Charging of tRNA with specific amino acids (C) Termination of protein synthesis (D) Nucleophilic attack on esterified carboxyl group of peptidyl tRNA
Last Answer : Answer : B
Description : The active site of an enzyme is formed by a few of the enzymes: (A) R groups of the amino acids (B) Amino groups of the amino acids (C) Carboxyl group of the amino acids (D) Exposed sulfur bonds
Description : The central heavy metal cobalt of vitamin B12 is coordinately bound to (A) Cyanide group (B) Amino group (C) Carboxyl group (D) Sulphide group
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 : Reducing ability of carbohydrates is due to (A) Carboxyl group (B) Hydroxyl group (C) Enediol formation (D) Ring structure
Last Answer : A
Description : For synthesis of CTP and UTP, the amino group comes from (A) Amide group of Asparagine (B) Amide group of glutamine (C) α-Amino group of glutamine (D) α-Amino group of glutamate
Description : The carboxyl functional group (-COOH) is present in
Last Answer : The carboxyl functional group (-COOH) is present in A. picric acid B. barbituric acid C. ascorbic acid D. aspirin
Description : Which does not have a carboxyl group?
Last Answer : Which does not have a carboxyl group? A. Picric acid B. Ethanoic acid C. Aspirin D. Benzoic acid
Description : The greater acidity of carboxylic acids compared to alcohols arises primarily from : (a) the electron-donating effect of the hydroxyl group (b) the electron-withdrawing effect of the carboxyl ... of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion
Last Answer : the resonance stability associated with the carboxylate ion
Description : A functional group designated—COOH is known as a/an a. Carboxyl. b. Carbonyl. c. Amino. d. Hydroxyl.
Last Answer : a. Carboxyl.
Description : What is the name given to the bond that links an amino group of one molecule of an amino acid to a carboxyl group of another amino acid?
Last Answer : ANSWER: PEPTIDE LINK or AMIDE LINK or PEPTIDE BOND
Description : α-Oxidation i.e., the removal of one carbon at a time from the carboxyl end of the molecule has been detected in (A) Brain tissue (B) Liver (C) Adipose tissue (D) Intestine
Description : High iodine value of a lipid indicates (A) Polymerization (B) Carboxyl groups (C) Hydroxyl groups (D) Unsaturation
Description : During each cycle of β-oxidation (A) One carbon atom is removed from the carboxyl end of the fatty acid (B) One carbon atom is removed from the methyl end of the fatty acid (C) Two carbon atoms ... carboxyl end of the fatty acid (D) Two carbon atoms are removed from the methyl end of the fatty acid
Description : The acid amide of Aspartic acid is (A) Glutamine (B) Arginine (C) Aspargine (D) Ornithine
Description : What is an amide?
Last Answer : The extra carboxyl group (other thanˇalpha car- boxyl) can combine with ammonia to form the cor- responding amide.
Description : The deficiency of Niacin-a vitamin of B complex group causes the disease _____ (1) Marasmus (2) Pellagra (3) Rickets (4) Nightblindness
Last Answer : Pellagra
Description : Cobalt is a constituent of (A) Folic acid (B) Vitamin B12 (C) Niacin (D) Biotin
Description : Cofactor for transamination is (A) Thymine (B) Riboflavin (C) Pyridoxine (D) Niacin
Description : The three vitamins which are specially required for proper nerve functions are (A) Thiamine, Niacin and Riboflavin (B) Thiamin, Folic acid, Choline (C) Thiamine, Riboflavin, Pantothenic acid (D) Thiamine, Pyridoxin, Vitamin B12
Description : The sulphur containing vitamins among the following B Vitamin is (A) Thiamine (B) Riboflavin (C) Niacin (D) Pyridoxine
Description : Rice-polishings contain whcih of the following Vitamin? (A) Riboflavin (B) Niacin (C) Thiamine (D) Vitamin B12
Description : This is photo labile vitamin: (A) Thiamine (B) Riboflavin (C) Niacin (D) Cholecalciferol
Description : The human species can biosynthesize (A) Vitamin C (B) Vitamin B12 (C) Thiamine (D) Niacin
Description : Vitamins that function as dinucleotide derivatives include all the following except (A) Thiamine (B) Niacin (C) Nicotinate (D) Vitamin B2
Description : Fully activated pyruvate carboxylase depends upon the presence of (A) Malate and Niacin (B) Acetyl CoA and biotin (C) Acetyl CoA and thiamine pyrophosphate (D) Oxaloacetate and biotin
Description : Which of the following vitamins would most likely become deficient in a person who develops a completely carnivorous life style? (A) Thiamine (B) Niacin (C) Cobalamine (D) Vitamin C
Description : The three vitamins which are specially required for proper nerve functions are acid: (A) Thiamine, niacin and riboflavin (B) Thiamine, folic acid, choline (C) Thiamine, riboflavin, patothenic acid (D) Thiamine, pyridoxin, vitamin B12
Description : The sulphur-containing vitamins among the following B-Vitamin is (A) Thiamine (B) Riboflavin (C) Niacin (D) Pyridoxine
Description : Rice polishings contain this vitamin: (A) Riboflavin (B) Niacin (C) Thiamine (D) Vitamin B12
Description : Convulsions and delirium could be caused by a severe deficiency of (A) Thiamine (B) Glutamate (C) Niacin (D) Magnesium
Description : This is a photo-labile vitamin. (A) Thiamine (B) Riboflavin (C) Niacin (D) Cholecalciferol
Description : Dictary deficiency of this vitamin leads to night blindness: (A) Retinol (B) Niacin (C) Ascorbic acid (D) Cholecalciferol VITAMINS 125
Description : A vitamin which can be synthesized by human beings is (A) Thiamin (B) Niacin (C) Folic acid (D) Cyanocobalamin
Description : Niacin deficiency can occur in (A) Hartnup disease (B) Phenylketonuria (C) Alkaptonuria (D) None of these
Description : Niacin deficiency is common in people whose staple food is (A) Wheat (B) Polished rice (C) Maize and /or sorghum (D) None of these
Description : Daily requirement of niacin is (A) 5 mg (B) 10 mg (C) 20 mg (D) 30 mg
Description : Niacin can be synthesised in human beings from (A) Histidine (B) Phenylalanine (C) Tyrosine (D) Tryptophan
Description : Pellagra preventing factor is (A) Thiamin (B) Riboflavin (C) Niacin (D) Pyridoxine
Description : Subacute combined degeneration of cord is caused due to deficiency of (A) Niacin (B) Cobalamin (C) Biotin (D) Thiamin VITAMINS 117
Description : The vitamin required as coenzyme for the action of transaminases is (A) Niacin (B) Pantothenic acid (C) Pyridoxal phosphate (D) Riboflavin
Description : In the body 1 mg of niacin can be produced from (A) 60 mg of pyridoxine (B) 60 mg of tryptophan (C) 30 mg of tryptophan (D) 30 mg of pantothenic acid