Description : The cyclisation of squalene in mammals results in the direct formation of the sterol. (A) Cholesterol (B) Lanosterol (C) Sistosterol (D) Zymosterol
Last Answer : Answer : B
Description : What is the first sterol ring formed during cholesterol biosynthesis?
Last Answer : Lanosterol.
Description : Prostaglandins are (A) C2 unsaturated acids (B) C27 saturated alcohols (C) C20 saturated acids (D) C27 saturated alcohols
Last Answer : Answer : A
Description : The principal sterol excreted in feces is (A) Coprostanol (B) Zymosterol (C) Lanosterol (D) Desmosterol
Description : Erythromycin contains (A) Dimethyl amino sugar (B) Trimethyl amino sugar (C) Sterol and sugar (D) Glycerol and sugar
Last Answer : A
Last Answer : (A) Dimethyl amino sugar
Description : All the following correctly describe the intermediate 3-OH-3-methyl glutaryl CoA except (A) It is generated enzymatically in the mitochondrial matrix (B) It is formed in the cytoplasm (C) It inhibits the first step in cholesterol synthesis (D) It is involved in the synthesis of ketone bodies
Last Answer : Answer : C
Description : All statements regarding 3-OH-3 methyl glutaryl CoA are true except (A) It is formed in the cytoplasm (B) Required in ketogenesis (C) Involved in synthesis of Fatty acid (D) An intermediate in cholesterol biosynthesis
Description : The methyl groups in the aromatic nucleus of a tocopherols are (A) 2 (B) 3 (C) 4 (D) 5
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 : Most animal tissues contain appreciable amounts of lipid, when in the form of depot fat it consists largely of (A) Cholesterol ester (B) Phosphatides (C) Chylomicrons (D) Triacylglycerol
Last Answer : Answer : D
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 : The biosynthesis of both Catecholamine and serotonin require (A) Tyrosine hydroxylase (B) N-methyl transferase (C) Aromatic amino acid decarboxylase (D) Tryptophan pyrrolase
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
Description : Methyl malonic aciduria is seen in the 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-OH 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) Xantherunic acid (D) Phenyl pyruvic acid
Description : Both folic acid and methyl cobalamin (vitamin B12) are required in (A) Deamination of serine (B) Deamination of threonine (C) Conversion of pyridoxal phosphate to pyridoxamine phosphate (D) Methylation of homocystein to methionine
Description : Waxes contain higher alcohols named as (A) Methyl (B) Ethyl (C) Phytyl (D) Cetyl
Description : Lecithins are soluble in ordinary solvents except (A) Benzene (B) Ethyl alcohol (C) Methyl alcohol (D) Acetone
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 : Higher alcohol present in waxes is (A) Benzyl (B) Methyl (C) Ethyl (D) Cetyl
Description : RNA does not contain (A) Uracil (B) Adenine (C) Hydroxy methyl cytosine (D) Phosphate
Description : Neogenesis of methyl group is (A) The availability of methyl group form δ adenosyl methionine (B) The availability of methyl group from betaine (C) Interaction between N5 N10 methylene tetra hydrofolate with a NAD+ dependent reductase (D) Availability of methyl group from methyl B12
Description : Tetra hydroglolate can be freed from N5 methyl tetrahydrofolate only by (A) Nor epinephrine (B) Ethanol amine (C) Nicotinamide (D) Vitamin B12
Description : Transmethylation of guanido acetic acid gives (A) Creatine phosphate (B) Creatinine (C) Choline (D) n-methyl nicotinamide
Description : Methyl dopa decreases blood pressure by (A) Inhibiting the synthesis of catecholamines (B) Antagonising the action of aldosterone (C) Stimulating the release of renin (D) Inhibiting the breakdown of angiotensin
Description : To calculate the e.m.f of the cell when does the nelsons equation is use ?
Last Answer : The Nernst equation is useful to calculate the e.m.f of the cell when the concentrations of solution are different from unity.
Description : Cholesterol 1. Is a type of chlorophyll 2. Is a derivative of chloroform 3. Is a fatty alcohol found in animal fats 4. Causes hypertension The correct answers are: (a) 1 and 2 (b) 1, 3 and 4 (c) 3 and 4 (d) 1 and 4
Last Answer : Ans:(c)
Description : The thre The three groups o e groups of indust f industrial pr rial products a oducts and servi nd services inc ces include all of t lude all of the foll he following exc owing except _____. a. materials and parts b. capital items capital items c. maintenance and operations d. supplies and services
Last Answer : c. maintenance and operations