Description : Our body can get pentoses from (A) Glycolytic pathway (B) Uromic acid pathway (C) TCA cycle (D) HMP shunt
Last Answer : D
Description : HMP shunt is present in (A) Erythrocytes (B) Liver (C) Testes (D) All of these
Last Answer : Answer : D
Description : Red blood cells: a. measured 15 um in diameter b. do not contain mitochondria c. have a life span of 120 days in the circulation d. are released from the bone marrow as mature erythrocytes
Last Answer : do not contain mitochondria
Description : The reaction catalysed by phosphofructokinase (A) Is activated by high concentrations of ATP and citrate (B) Uses fruitose-1-phosphate as substrate (C) Is the rate-limiting reaction of the glycolytic pathway (D) Is inhibited by fructose 2, 6-bisphosphate
Last Answer : C
Description : What is the role of NAD+ in cellular respiration ? (1) It functions as an enzymes (2) It functions as an electron carrier (3) It is a nucleotide source for ATP synthesis (4) It is the final electron acceptor for anaerobic respiration
Last Answer : (2) It functions as an electron carrier
Description : Which one of the following statements is incorrect? (A) Insulin increases glucose phosphorylation (B) Insulin increases glycolysis (C) Insulin augments HMP shunt (D) Insulin promotes gluconeogenesis
Description : Excessive secretion of glucocorticoids raises blood glucose by (A) Decreasing glycogenesis (B) Increasing glycogenolysis (C) Increasing gluconeogenesis (D) Inhibiting HMP shunt
Last Answer : Answer : C
Description : The rate of HMP shunt reactions is (A) Increased by Insulin (B) Increased in diabetes mellitus (C) Increased by glucagons (D) Increased in starvation
Last Answer : Answer : A
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
Description : The first pentose formed in HMP shunt is (A) Ribose-5-phosphate (B) Ribulose-5-phosphate (C) Xylose-5-phosphate (D)Xylulose-5-phosphate
Last Answer : Answer : B
Description : The decarboxylation reaction in HMP shunt is catalysed by (A) Gluconolactone hydrolase (B) 6-Phosphogluconate dehydrogenase (C) 6-Phosphogluconate decarboxylase (D) Transaldolase
Description : NAD is required as a conenzyme in (A) Citric acid cycle (B) HMP shunt (C) β-Oxidation of fatty acids (D) Both (A) and (C)
Description : NADP is required as a coenzyme in (A) Glycolysis (B) Citric acid cycle (C) HMP shunt (D) Gluconeogenesis
Description : The most important source of reducing equivalents for FA synthesis on the liver is (A) Glycolysis (B) HMP-Shunt (C) TCA cycle (D) Uronic acid pathway
Description : Which of the following enzyme is not involved in HMP shunt? (A) Glyceraldehyde-3-p dehydrogenase (B) Glucose-6-p-dehydrogenase (C) Transketolase (D) Phosphogluconate dehydrogenase
Last Answer : A
Description : Dehydrogenases involved in HMP shunt are specific for (A) NADP+ (B) NAD+ (C) FAD (D) FMN
Description : One molecule of glucose gives ______ molecules of CO2 in one round of HMP shunt. (A) 6 (B) 1 (C) 2 (D) 3
Last Answer : B
Description : Pentose production is increased in (A) HMP shunt (B) Uromic acid pathway (C) EM pathway (D) TCA cycle
Description : The four membered aldose sugar phosphate formed in HMP shunt pathway is (A) Xylulose P (B) Erythrulose P (C) Erythrose P (D) Ribulose P
Description : Two important byproducts of HMP shunt are (A) NADH and pentose sugars (B) NADPH and pentose sugars (C) Pentose sugars and 4 membered sugars (D) Pentose sugars and sedoheptulose
Description : The heptose ketose sugar formed as a result of chemical reaction in HMP shunt: (A) Sedoheptulose (B) Galactoheptose (C) Glucoheptose (D) Mannoheptose
Description : An amphibolic pathway among the following is (A) HMP shunt (B) Glycolysis (C) Citirc acid cycle (D) Gluconeogenesis
Description : What is the purpose of HMP shunt pathway?
Last Answer : It generates NADPH.
Description : What is the hormonal control over HMP shunt pathway?
Last Answer : Insulin stimulates the pathway by activating the key enzyme.
Description : What are the tissues in which HMP shunt pathway is significant?
Last Answer : Liver, adipose tissue, RBC, adrenal cortex, ovary, testis, mammary gland, lens.
Description : HMP shunt pathway use how much glucose?
Last Answer : About 10% of glucose molecules per day are entering in this pathway.
Description : In conversion of lactic acid to glucose, three reactions of glycolytic pathway are circumvented, which of the following enzymes do not participate? (A) Pyruvate carboxylase (B) Phosphoenol pyruvate carboxy kinase (C) Pyruvate kinase (D) Glucose-6-phosphatase
Description : Which of the following enzymes in Glycolytic pathway is inhibited by fluoride? (A) Glyceraldehyde-3-p dehydrogenase (B) Phosphoglycerate kinase (C) Pyruvate kinase (D) Enolase
Description : In conversion of Lactic acid to Glucose, three reactions of Glycolytic pathway are circumvented, which of the following enzymes do not participate? (A) Pyruvate Carboxylase (B) Phosphoenol pyruvate carboxy kinase (C) Pyruvate kinase (D) Glucose-6-phosphatase
Description : What are key glycolytic enzymes?
Last Answer : Glucokinase, Phospho fructo kinase, Pyruvate kinase.
Description : In the erythrocytes, the net production of ATP molecules by the Rapport-Leubering pathway is (A) 0 (B) 2 (C) 4 (D) 8
Description : The pentose phosphate pathway protects erythrocytes against hemolysis by assisting the enzyme: (A) Superoxide dismutase (B) Catalase (C) Glutathionic peroxidase (D) Cytochrome oxidase ENZYMES 149
Description : The most abundant free nucleotide in mammalian cells is (A) ATP (B) NAD (C) GTP (D) FAD
Description : The pyrimidine nucleotide acting as the high energy intermediate is (A) ATP (B) UTP (C) UDPG (D) CMP
Description : G-proteins have a nucleotide binding site for (A) ADP/ATP (B) GDP/GTP (C) CDP/CTP (D) UDP/UTP
Description : All of the following enzymes are unique to purine nucleotide synthesis except (A) PRPP synthetase (B) PRPP glutamyl amido transferase (C) Adenylosuccinate synthetase (D) IMP dehydrogenase
Description : A substrate for enzymes of pyrimidine nucleotide biosynthesis is (A) Allopurinol (B) Tetracylin (C) Chloramphenicol (D) Puromycin
Description : Nucleotide found free in the cells is: (a) CAMP (b) AMP (c) ADP (d) ATP
Last Answer : Ans. ((d))
Description : What is the role of NAD+ in cellular respiration? (a) It functions as an enzyme. (b) It functions as an electron carrier. (c) It is a nucleotide source for ATP synthesis. (d) It is the final electron acceptor for anaerobic respiration.
Last Answer : c) It is a nucleotide source for ATP synthesis.
Description : ATP is (a) nucleotide (b) nucleoside (c) nucleic acid (d) vitamin.
Last Answer : (a) nucleotide
Description : Dehydrogenase enzymes of the hexose monophosphate shunt are (A) NAD+ specific (B) NADP+ specific (C) FAD specific (D) FMN specific
Description : Substrate-linked phosphorylation occurs in (A) Glycolytic pathway(B) Citric acid cycle (C) Both (A) and (B) (D) None of these
Description : Glycerol can enter glycolytic pathway via (A) Dihydroxyacetone phosphate (B) 1, 3-Biphospoglycerate (C) 3-Phosphoglycerate (D) 2-Phosphoglycerate
Description : Glycolytic pathway is located in (A) Mitochondria (B) Cytosol (C) Microsomes (D) Nucleus
Description : In the glycolytic pathway, enolpyruvate is converted to ketopyruvate by (A) Pyruvate kinase (B) Phosphoenolpyruvate (C) Pyruvate dehydrogenase (D) Spontaneously
Description : In glycolytic pathway, iodacetate inhibits the activity of the enzyme: (A) Phosphotriose isomerase (B) Glyceraldehyde-3-phosphate dehydrogenase (C) Pyruvate kinase (D) Phosphofructokinase
Description : Which of the following is a substrate for aldolase activity in Glycolytic pathway? (A) Glyceraldehyde-3-p (B) Glucose-6-p (C) Fructose-6-p (D) Fructose1, 6-bisphosphate
Description : Most of the metabolic pathways are either anabolic or catabolic. Which of the following pathways is considered as “amphibolic” in nature? (A) Glycogenesis (B) Glycolytic pathway (C) Lipolysis (D) TCA cycle
Description : Restriction endonucleases are enzymes which (a) make cuts at specific positions within the DNA molecule (b) recognize a specific nucleotide sequence for binding of DNA ligase (c) restrict the action of the enzyme DNA polymerase (d) remove nucleotides from the ends of the DNA molecule
Last Answer : (a) make cuts at specific positions within the DNA molecule
Description : In most metabolic pathways, all needed enzymes are arranged together in a multienzyme complex within a (A) Solution of ATP (B) Membrane (C) Quanternary protein (D) Coenzyme