Description : The biosynthesis of both Catecholamine and serotonin require (A) Tyrosine hydroxylase (B) N-methyl transferase (C) Aromatic amino acid decarboxylase (D) Tryptophan pyrrolase
Last Answer : Answer : B
Description : Tocopherols prevent the oxidation of (A) Vitamin A (B) Vitamin D (C) Vitamin K (D) Vitamin C
Last Answer : Answer : A
Description : Biological activity of tocopherols has been attributed in part to their action as (A) Antioxidant (B) Anticoagulents (C) Provitamin (D) Carriers in electron transport system
Description : The tocopherols prevent the oxidation of (A) Vitamin A (B) Vitamin D (C) Vitamin K (D) Vitamin C
Description : Some tocopherols are (A) Terpenoid in structure (B) Dional in structure (C) Isoprenoid in structure (D) Farnesyl in structure
Description : The activity of tocopherols is destroyed by (A) Oxidation (B) Reduction (C) Conjugation (D) All of these
Description : The activity of tocopherols is destroyed by (A) Commercial cooking (B) Reduction (C) Conjugation (D) All of these
Description : The Instrinisic Factor (HCl and mucoproteins) present in the gastric juice help in the absorption of (A) Vitamin B2 (B) Tocopherols (C) Folic acid (D) Vitmain B12
Last Answer : Answer : D
Description : Rancidity of butter is prevented by the addition of (A) Vitamin D (B) Tocopherols (C) Presence of priotin (D) Presence of ‘Cu’ FATS AND FATTY ACID METABOLISM 97
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 : Cholesterol is a (A) Animal sterol (B) M.F. C27 H46O (C) 5 methyl groups (D) All of these
Description : Which antibiotic contains NO2 group attached to aromatic nucleus in its structure ?
Last Answer : Ans. Chloramphenicol.
Description : (A) Tertiary butyl carbonion is more stable than methyl carbanion. (R) `+I` effect of the three methyl groups in tertiary butyl carbanion tends to mak
Last Answer : (A) Tertiary butyl carbonion is more stable than methyl carbanion. (R) `+I` effect of the three methyl ... IF (A) is incorrect but (R) is correct.
Description : The two functional groups characteristic of sugars are (a) hydroxyl and methyl (b) carbonyl and methyl (c) carbonyl and phosphate (d) carbonyl and hydroxyl.
Last Answer : (d) carbonyl and hydroxyl.
Description : The two functional groups characteristic of sugars are (1) hydroxyl and methyl (2) carbonyl and methyl (3) carbonyl and phosphate (4) carbonyl and hydroxyl
Last Answer : (4) carbonyl and hydroxyl
Description : A major structural difference between estrogens and androgens is the fact that (A) The androgens are usually C21 steroids (B) The estrogens are usually digitonin - precipitable (C) The androgens have an aromatic ring (D) The estrogens have an aromatic ring
Description : Which of one ring in the structure of the following is aromatic? (A) Androgens (B) Estrogens (C) Cholesterol (D) Bile acids
Description : An enzyme involved in catabolism of catecholamines is (A) Dopa decarboxylase (B) Aromatic amino acid decarboxylase (C) Monoamine oxidase (D) Catechol oxidas
Last Answer : Answer : C
Description : A coenzyme containing aromatic hetero ring is (A) TPP (B) Lipoic acid (C) Coenzyme Q (D) Biotin
Description : A coenzyme containing non aromatic hetero ring is (A) ATP (B) NAD (C) FMN (D) Biotin
Description : Xanthoproteic test is positive in proteins containing (A) Sulphur amino acids (B) α-Amino acids (C) Aromatic amino acids (D) Aliphatic amino acids
Description : Side chains of all following amino acids contain aromatic rings except (A) Phenyl alanine (B) Alanine (C) Tyrosine (D) Tryptophan
Description : Side chains of all amino acids contain aromatic rings except (A) Pheynl alanine (B) Alanine (C) Tyrosine (D) Tryptophan
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
Description : Edman’s reaction can be used to (A) Determine the number of tyrosine residues in a protein (B) Determine the number of aromatic amino acid residues in a protein (C) Determine the amino acid sequence of a protein (D) Hydrolyse the peptide bonds in a protein
Description : Aromatic amino acids can be detected by (A) Sakaguchi reaction (B) Millon-Nasse reaction (C) Hopkins-Cole reaction (D) Xanthoproteic reaction
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 : An aromatic amino acid is (A) Lysine (B) Tyrosine (C) Taurine (D) Arginine
Description : Give the names of aromatic amino acids.
Last Answer : Phenylalanine and tyrosine.
Last Answer : (B) Tyrosine
Description : In contrast to Eukaryotic mRNA, prokaryotic mRNA is characterized by (A) Having 7-methyl guanosine triphosphate at the 5’ end (B) Being polycystronic (C) Being only monocystronic (D) Being synthesized with introns
Description : Goitrogenic substance present in cabbage is (A) 5-vinyl-2 thio oxalzolidone (B) Pyridine-3-carboxylic acid (C) 3-Hydroxy-4, 5-dihydroxymethyl1–2-methyl pyridine (D) δ-ALA dehydratase
Description : In pernicious anemia, Urine contains high amounts of (A) Methyl malonic acid(B) FIGLU (C) VMA (D) 5 HIAA
Description : Urine bases with methyl substituents occurring in plants are (A) Caffeine (B) Theophylline (C) Theobromine (D) All of these
Description : RNA does not contain (A) adenine (B) OH methyl cytosine (C) d-ribose (D) Uracil
Description : Progressive transmethylation of ethanolamine gives (A) Creatinine (B) Choline (C) Methionine (D) N-methyl nicotinamide
Description : Which of these methyl donors is not a quanternary ammonium compound? (A) Methionine (B) Choline (C) Betain (D) Betainaldehyde
Description : For the synthesis of TMP from dump, a coenzyme is required which is (A) N10- Formyl tetrahydrofolate (B) N5- Methyl tetrahydrofolate (C) N5, N10- Methylene tetrahydrofolate (D) N5- Formimino tetrahydrofolate
Description : The rate limiting step in catecholamine synthesis is catalysed by (A) Phenylalanine hydroxylase (B) Tyrosine hydroxylase (C) Dopa decarboxylase (D) Phenylethanolamine N-methyl transferase
Description : The precursor of testosterone is (A) Aldosterone (B) Methyl testosterone (C) Estrone (D) Pregnenolone
Description : In the synthetic pathway of epinephrine, disulfiram (antabuse) inhibits the enzyme: (A) Tyrosine hydroxylase (B) Dopamine β-hydroxylase (C) DOPA decarboxylase (D) N-methyl transferase
Description : Acetoacetyl-CoA condenses with one more molecule of acetyl-CoA to form (A) Mevalonate (B) Acetoacetate (C) β-Hydroxybutyrate (D) 3-Hydroxy 3-methyl-glutaryl-CoA
Description : In the pathway leading to biosynthesis of acetoacetate from acetyl-CoA in liver, the immediate precursor of aceotacetate is (A) Acetoacetyl-CoA (B) 3-Hydroxybutyryl-CoA (C) 3-Hydroxy-3-methyl-glutaryl-CoA (D) 3-Hydroxybutyrate
Description : A biochemical indication of vitamin B12 deficiency can be obtained by measuring the urinary excretion of (A) Pyruvic acid (B) Malic acid (C) Methyl malonic acid (D) Urocanic acid
Description : Methyl malonic aciduria is seen in a deficiency of (A) Vitamin B6 (B) Folic acid (C) Thiamine (D) Vitamin B12
Description : In beri beri there will be accumulation of _________ in blood. (A) Aceto acetic acid (B) β−hydroxy butyric acid (C) Pyruvic acid (D) Methyl malonic acid
Description : This abnormal metabolite may be responsible for the neurological manifestation of pernicious anemia. (A) Taurine (B) Methyl malonic acid (C) Xanthurenic acid (D) Phenyl pyruvic acid
Description : The following has cyanide: (A) Vitamin B12 (B) Adenyl cobamide (C) Benzimidazole cobamide (D) Methyl cobamide