Description : Fructose 2, 3 bi phosphate is a powerful allosteric activator of (A) Fructose 1, 6 diphosphatase (B) Phosphofructokinase (C) Hexokinase (D) Fructokinase
Last Answer : Answer : B
Description : Cytosolic and mitochondrial carbamoyl phosphate synthetase have the following similarity: (A) Both use ammonia as a substance (B) Both provide carbamoyl phosphate for urea synthesis (C) Both require N-acetylglutamate as an activator (D) Both are allosteric enzymes
Last Answer : Answer : C
Description : Pompe ’s d isease is caused due to deficiency of (A) Lysosomal α-1→4 and 1→6-glucosidase (B) Glucose-6-phosphatase (C) Glycogen synthase (D) Phosphofructokinase
Last Answer : Answer : A
Description : An essential agent for converting glucose to glycogen in liver is (A) Latic acid (B) GTP (C) UTP (D) Pyruvic acid
Description : An essential for converting Glucose to Glycogen in Liver is (A) Lactic acid (B) GTP (C) CTP (D) UTP CARBOHYDRATES AND CARBOHYDRATE METABOLISM 19
Last Answer : D
Description : Action of glycogen synthase is inhibited by (A) Insulin (B) Glucose (C) Mg2+ (D) Cyclic AMP
Description : One of the following statement is correct: (A) Glycogen synthase ‘a’ is the phosphorylated (B) cAMP converts glycogen synthase b to ‘a’ (C) Insulin converts glycogen synthase b to a (D) UDP glucose molecules interact and grow into a Glycogen tree
Last Answer : C
Description : In the reaction below, Nu TP stands for NuTP + glucose → Glucose 6–Phosphate + NuDP. (A) ATP (B) CTP (C) GTP (D) UTP
Description : Glucose-6-phosphate is an allosteric inhibitor of (A) Glucokinase (B) Hexokinase (C) Phosphohexose isomerase (D) None of these
Description : Hexokinase is inhibited in an allosteric manner by (A) Glucose-6-Phosphate (B) Glucose-1-Phosphate (C) Fructose-6-phosphate (D) Fructose-1, 6-biphosphate
Description : In gluconeogensis, an allosteric activator required in the synthesis of oxaloacetate from bicarbonate and pyruvate, which is catalysed by the enzyme pyruvate carboxylase is (A) Acetyl CoA (B) Succinate (C) Isocitrate (D) Citrate
Description : Glycogen phosphorylase liberates the following from glycogen (A) Glucose (B) Glucose-6-phosphate (C) Glucose-1-phosphate (D) Maltose
Description : In the synthesis of glycogen from glucose the reversible step is (A) Glucose → glucose 6-phosphate (B) Glucose 6-phosphate → glucose 1-phosphate (C) Glucose 1-phosphate → UDP glucose (D) UDP glucose → glycogen
Description : Glycogen while being acted upon by active phosphorylase is converted first to (A) Glucose (B) Glucose 1-phosphate and Glycogen with 1 carbon less (C) Glucose-6-phosphate and Glycogen with 1 carbon less (D) 6-Phosphogluconic acid
Description : In glycogenesis a branch point in the molecule is established by the enzyme (A) Amylo[1→ 4][1→ 6] transglucosidase (B) α [1→ 4] α [1→ 4] Glucan transferase (C) Amylo [1→ 6] glucosidase (D) Glycogen synthase
Description : Glucose-1-phosphate liberated from glycogen cannot be converted into free glucose in (A) Liver (B) Kidneys (C) Muscles (D) Brain
Description : Glycogen is converted to glucose-1- phosphate by (A) UDPG transferase (B) Branching enzyme (C) Phosphorylase (D) Phosphatase
Description : Her’s disease is characterized by deficiency of (A) Muscle phosphorylase (B) Liver phosphorylase (C) Debranching enzyme (D) Glycogen synthase
Description : Cori disease (Limit dextrinosis) is caused due to absence of (A) Branching enzyme (B) Debranching enzyme (C) Glycogen synthase (D) Phosphorylase
Description : The hormone activating the glycogen synthase activity is (A) Insulin (B) Glucagon (C) Epinephrine (D) ACTH
Description : A regulator of the enzyme Glycogen synthase is (A) Citric acid (B) 2, 3 bisphosphoglycerate (C) Pyruvate (D) GTP
Description : One of the following enzymes does not change glycogen synthase a to b. (A) Glycogen synthase kinases 3, 4, 5 (B) Ca2+ calmodulin phosphorylase kinase (C) Ca2+ calmodulin dependent protein kinase (D) Glycogen phosphorylase a
Description : Cytosolic carbamoyl phosphate synthetase is inhibited by (A) UTP (B) CTP (C) PRPP (D) TMP
Description : CTP synthetase forms CTP from (A) CDP and inorganic phosphate (B) CDP and ATP (C) UTP and glutamine (D) UTP and glutamate
Description : A regulator of the enzyme glucogen synthase is (A) Citric Acid (B) Pyruvate (C) Glucose-6-PO4 (D) GTP
Description : The best known cause of galactosemia is the deficiency of (A) Galactose 1-phosphate and uridyl transferase (B) Phosphoglucomutase (C) Galactokinase (D) Lactose synthase
Description : Glucose-6-phosphatase and PEP carboxy kinase are regulated by (A) Covalent modification (B) Allosteric regulation (C) Induction and repression (D) All of these
Description : An enzyme which acts as allosteric regulator and sensitive to both phosphate concentration and to the purine nucleotides is (A) PRPP synthetase (B) PRPP glutamyl midotransferase (C) HGPR Tase (D) Formyl transferase
Description : An example of feedback inhibition is (A) Allosteric inhibition of hexokinase by glucose6-phosphate (B) Cyanide action on cytochrome (C) Sulpha drug on folic acid synthesizer bacteria (D) Reaction between succinic dehydrogenase and succinic acid
Description : Which of the following reaction gives lactose? (A) UDP galactose and glucose (B) UDP glucose and galactose (C) Glucose and Galactose (D) Glucose, Galactose and UTP
Last Answer : A
Description : The branching enzyme acts on the glycogen when the glycogen chain has been lengthened to between glucose units: (A) 1 and 6 (B) 2 and 7 (C) 3 and 9 (D) 6 and 11
Description : Glycogen structure includes a branch in between–glucose units: (A) 6–12 (B) 8–14 (C) 6–10 (D) 12–18
Description : What is the major form of caloric storage in human body? (A) ATP (B) Glycogen (C) Creatine phosphate (D) triacylglycerol
Description : Pyridoxal phosphate is a coenzyme for (A) Glycogen synthetase (B) Phosphorylase (C) Both (A) and (B) (D) None of these
Description : The pathway of glycogen biosynthesis involves a special nucleotide of glucose. In the reaction below, NuDP stands for NuDP Glucose + glycogenn → NuDP + glycogenn+1 (A) ADP (B) GDP (C) UDP (D) CDP
Description : The process of breakdown of glycogen to glucose in the liver and pyruvate and lacate in the muscle is known as (A) Glyogenesis (B) Glycogenolysis (C) Gluconeogenesis (D) Cellular degradation
Description : Renal glycosuria occurs due to (A) Increased filtration of glucose in glomeruli (B) Increased secretion of glucose by renal tubular cells (C) Decreased reabsorption of glucose by renal tubular cells (D) Increased conversion of glycogen into glucose in tubular cells
Last Answer : Answer : D
Description : The carbohydrate reserved in human body is (A) Starch (B) Glucose (C) Glycogen (D) Inulin
Description : Starch and glycogen are polymers of (A) Fructose (B) Mannose (C) α−D-Glucose (D) Galactose
Description : Glycogen synthetase activity is depressed by (A) Glucose (B) Insulin (C) Cyclic AMP (D) Fructokinase
Description : Uridine diphosphate glucose (UDPG) is (A) Required for metabolism of galactose (B) Required for synthesis of glucuronic acid (C) A substrate for glycogen synthetase (D) All of the above
Description : Branching occurs in glycogen approximately after every (A) Five glucose units (B) Ten glucose units (C) Fifteen glucose units (D) Twenty glucose units
Last Answer : B
Description : A carbohydrate, commonly known as dextrose is (A) Dextrin (B) D-Fructose (C) D-Glucose (D) Glycogen
Description : Oxidation of which substance in the body yields the most calories (A) Glucose (B) Glycogen (C) Protein (D) Lipids
Description : In the glycogen synthesis, which is the active glucose derivative?
Last Answer : UDP-glucose.
Description : Which of the following is present as a marker in lysosomal enzymes to direct them to their destination? (A) Glucose-6-phosphate (B) Mannose-6-phosphate (C) Galactose-6-phosphate (D) N-Acetyl neuraminic acid
Description : The enzyme that converts glucose to glucose-6-phosphate is (A) Phosphatase (B) Hexokinase (C) Phosphorylase (D) Glucose synthetase
Description : A substrate for the enzyme aldolase is (A) galactose-6-phosphate (B) isocitric acid (C) Glucose-1-phosphate (D) Fructose 1, 6 diphosphate
Description : Which one of the following enzymes requires a coenzyme derived from the vitamin whose structure is shown below? (A) Enoyl CoA hydratase (B) Phosphofructokinase (C) Glucose-6-phosphatase (D) Glucose-6-phosphate dehydrogenase
Description : The regulatory enzyme in HMP shunt is (A) Glucose-6-phosphate dehydrogenase (B) 6-Phosphogluconate dehydrogenase (C) Both (A) and (B) (D) None of these