Lactate dehydrogenase test?

1 Answer

Answer :

DefinitionThe lactate dehydrogenase (LDH) test measures the amount of LDH in the blood.See also: LDH isoenzymesAlternative NamesLDH test; Lactic acid dehydrogenase testHow the test is performedThe health care provider will take blood from a vein or from your heel, finger, toe, or earlobe.The blood sample is sent to a laboratory, where it is placed in a machine called a centrifuge. The machine quickly spins the blood, which causes the liquid part (the serum) to separate from the cells. The LDH measurement is done on the serum.How to prepare for the testYour health care provider may ask you to stop taking drugs that may affect the test. Drugs that can increase LDH measurements include anesthetics, aspirin, clofibrate, fluorides, mithramycin, narcotics, and procainamide.Why the test is perfor

Related questions

Description : Zn is present as prosthetic group in this enzyme: (A) Carbonic anhydrase (B) Carboxy peptidase (C) Lactate dehydrogenase (D) All of these

Last Answer : Answer : D

Description : Isoenzymes of lactate dehydrogenase are useful for the diagnosis of (A) Heart disease (B) Kidney disease (C) Liver disease (D) Both (A) and (C)

Last Answer : Answer : D

Description : Schardinger’s enzyme is (A) Lactate dehydrogenase (B) Xanthine dehydrogenase (C) Uric oxidase (D) L amino acid dehydrogenase

Last Answer : Answer : B

Description : Which of the following is not having an apoenzyme and coenzyme? (A) Lactate dehydrogenase (B) Succinate dehydrogenase (C) Malate dehydrogenase (D) Pepsin

Last Answer : Answer : D

Description : Coenzymes derived from the vitamin shown below are required by which of the following enzymes? (A) Lactate dehydrogenase (B) Glutamate dehydrogenase (C) Pyruvate dehydrogenase (D) Malate dehydrogenase

Last Answer : Answer : C

Description : Which of the following is an allosteric enzyme? (A) Phosphohexose isomerase (B) Phosphotriose isomerase (C) Lactate dehydrogenase (D) Phosphofructokinase

Last Answer : Answer : D

Description : Lactate dehydrogenase is a (A) Monomer (B) Dimer (C) Tetramer (D) Hexamer

Last Answer : Answer : C

Description : Lactate dehydrogenase is located in (A) Lysosomes (B) Mitochondria (C) Cytosol (D) Microsomes

Last Answer : Answer : C

Description : The first enzyme found to have isoenzymes was (A) Alkaline Phosphatase (B) Lactate dehydrogenase (C) Acid Phosphatase (D) Creatine kinase

Last Answer : Answer : B

Description : Which of the following isoenzyme of lactate dehydrogenase is raised in serum in myocardial infarction: (A) LD1 (B) LD2 (C) LD1 and LD2 (D) LD5

Last Answer : Answer : C

Description : Serum lactate dehydrogenase rises in (A) Viral hepatitis (B) Myocardial infarction (C) Carcinomatosis (D) All of these

Last Answer : Answer : D

Description : Pyruvate dehydrogenase a multienzyme complex is required for the production of (A) Acetyl-CoA (B) Lactate (C) Phosphoenolpyruvate (D) Enolpyruvate

Last Answer : Answer : A

Description : An example of functional plasma enzyme is (A) Lipoprotein lipase (B) Amylase (C) Aminotransferase (D) Lactate dehydrogenase

Last Answer : Answer : A

Description : An enzyme catalyzing oxidoreduction, using oxygen as hydrogen acceptor is (A) Cytochrome oxidase (B) Lactate dehydrogenase (C) Malate dehydrogenase (D) Succinate dehydrogenase

Last Answer : Answer : A

Description : Example of an extracellular enzyme is (A) Lactate dehydrogenase (B) Cytochrome oxidase (C) Pancreatic lipase (D) Hexokinase

Last Answer : Answer : C

Description : Lactate dehydrogenase has how many iso-enzymes?

Last Answer : H4, H3M, H2M2, M3H and M4 varieties, forming five iso-enzymes. All these five forms are seen in all persons.

Description : Lactate dehydrogenase has how many polypeptide subunits? 

Last Answer : Four. It is a tetramer.

Description : All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is (a) isocitrate dehydrogenase (b) malate dehydrogenase (c) succinate dehydrogenase (d) lactate dehydrogenase.

Last Answer : (c) succinate dehydrogenase

Description : What is the function of calcium lactate tablet ?

Last Answer : Calcium lactate tablets make bones strong and strong. Lack of calcium leads to osteoporosis or osteoporosis. Due to many small and big leaks, the bones gradually become weak. There is a risk ... needed. Therefore, taking calcium lactate tablets as per the doctor's advice eliminates bone problems.

Description : Anion gap of plasma can be due to the presence of all the following except (A) Bicarbonate (B) Lactate (C) Pyruvate (D) Citrate

Last Answer : Answer : A

Description : Quantitatively, the most significant buffer system in plasma is (A) Phosphate buffer system (B) Carbonic acid-bicarbonate buffer system (C) Lactic acid-lactate buffer system (D) Protein buffer system

Last Answer : Answer : B

Description : Glucose cannot be synthesized from (A) Glycerol (B) Lactate (C) Alanine (D) Leucine

Last Answer : Answer : D

Description : A unique by-product of glycolysis in erythrocytes is (A) Lactate (B) 1, 3-Biphosphoglycerate (C) 2, 3-Biphosphoglycerate (D) All of these

Last Answer : Answer : C

Description : Phosphofructokinase is allosterically inhibited by (A) Fructose-1, 6-biphosphate (B) Lactate (C) Pyruvate (D) Citrate

Last Answer : Answer : D

Description : End product of aerobic glycolysis is (A) Acetyl CoA (B) Lactate (C) Pyruvate (D) CO2 and H2O

Last Answer : Answer : C

Description : In non shivering thermogenesis (A) Glucose is oxidized to lactate (B) Fatty acids uncouple oxidative phosphorylation (C) Ethanol is formed (D) ATP is burned for heat production

Last Answer : Answer : B

Description : The number of ATP molecules required to convert 2 molecules of lactate into glucose in mammalian liver is (A) 2 (B) 4 (C) 5 (D) 6

Last Answer : Answer : D

Description : Which of the following intermediates of metabolism can be both a precursor and a product of glucose? (A) Lactate (B) Pyruvate (C) Alanine (D) Acetyl-CoA

Last Answer : Answer : A

Description : A reaction which may be considered an isomerisation is (A) Glucose 6-Phosphate fructose 6 phosphate (B) 3-Phosphoglycerate 2-phosphoglycerate (C) 2-phosphoglycerate phosphoenolpyruvate (D) Pyruvate Lactate

Last Answer : Answer : A

Description : Erythrocytes under normal conditions and microorganisms under anaerobic conditions may accumulate (A) NADPH (B) Pyruvate (C) Phosphoenolpyruvate (D) Lactate

Last Answer : Answer : D

Description : Vitamin B12 deficiency can be diagnosed by urinary excretion of (A) Pyruvate (B) Methylmalonate (C) Malate (D) Lactate

Last Answer : Answer : B

Description : Which of the following reactions is unique to gluconeogenesis? (A) Lactate Pyruvate (B) Phosphoenol pyruvate pyruvate (C) Oxaloacetate phosphoenol pyruvate (D) Glucose-6-phosphate Fructose-6-phosphate

Last Answer : C

Description : Which one of the following compounds cannot give rise to the net synthesis of Glucose? (A) Lactate (B) Glycerol (C) α-ketoglutarate (D) Acetyl CoA

Last Answer : B

Description : Which one of the following statements concerning glucose metabolism is correct? (A) The conversion of Glucose to lactate occurs only in the R.B.C (B) Glucose enters most cells by a mechanism in ... ) An elevated level of insulin leads to a decreased level of fructose 2, 6-bisphosphate in hepatocyte

Last Answer : C

Description : Which one of the following would be expected in pyruvate kinase deficiency? (A) Increased levels of lactate in the R.B.C (B) Hemolytic anemia (C) Decreased ratio of ADP to ATP in R.B.C (D) Increased phosphorylation of Glucose to Glucose-6-phosphate

Last Answer : B

Description : Compared to the resting state, vigorously contracting muscle shows (A) An increased conversion of pyruvate to lactate (B) Decreased oxidation of pyruvate of CO2 and water (C) A decreased NADH/NAD+ ratio (D) Decreased concentration of AMP CARBOHYDRATES AND CARBOHYDRATE METABOLISM 21

Last Answer : A

Description : Before pyruvic acid enters the TCA cycle it must be converted to (A) Acetyl CoA (B) Lactate (C) α-ketoglutarate (D) Citrate

Last Answer : A

Description : When O2 supply is inadequate, pyruvate is converted to (A) Phosphopyruvate (B) Acetyl CoA (C) Lactate (D) Alanine

Last Answer : C

Description : Which of the following metabolite integrates glucose and fatty acid metabolism? (A) Acetyl CoA (B) Pyruvate (C) Citrate (D) Lactate

Last Answer : A

Description : Ethanol decreases gluconeogenesis by (A) Inhibiting glucose-6-phosphatase (B) Inhibiting PEP carboxykinase (C) Converting NAD+ into NADH and decreasing the availability of pyruvate (D) Converting NAD+ into NADH and decreasing the availability of lactate

Last Answer : C

Description : Cori’s cycle transfers (A) Glucose from muscles to liver (B) Lactate from muscles to liver (C) Lactate from liver to muscles (D) Pyruvate from liver to muscles

Last Answer : B

Description : Lactate formed in muscles can be utilised through (A) Rapoport-Luebeling cycle (B) Glucose-alanine cycle (C) Cori’s cycle (D) Citric acid cycle

Last Answer : C

Description : An 18-year-old man shot once in the left chest has a blood pressure of 80/50 mm. Hg, a heart rate of 130 beats per minute, and distended neck veins. Immediate treatment might include: A. ... of the left chest in the second intercostal space. D. Emergency thoracotomy to cross-clamp the aorta.

Last Answer : Answer: AC DISCUSSION: The finding of distended neck veins in conjunction with hypotension should suggest tension pneumothorax or pericardial tamponade. Absent ipsilateral breath sounds and a trachea ... injuries. There is no role for aortic cross-clamping in this scenario of cardiogenic shock

Description : Which of the following statements about delivery-dependent oxygen consumption are true? A. Below the critical oxygen delivery (D(overdot)O 2crit), one would expect to see a decrease in the ... oxygen extraction ratio remains constant as long as oxygen delivery remains above D(overdot)O 2crit.

Last Answer : Answer: BC DISCUSSION: Oxygen consumption is said to be delivery dependent below a critical point, D(overdot)O 2crit, at which anaerobic metabolism supervenes. Above this point, oxygen ... the therapeutic benefit of trying to achieve supranormal oxygen delivery has not been firmly established

Description : The main product of glycolysis under aerobic conditions is a. Pyruvate b. Lactate c. None of these d. Both a and b Ans: A 2. The protein moiety of an enzyme is known as a. Holo enzyme b. Apo enzyme c. Co enzyme d. Enzyme

Last Answer : Ans: B

Description : Why lactate is transported from muscle to liver?

Last Answer : Oxygen is limited in muscle, so lactic acid could not be made to pyruvate in muscle. So, it is transported to liver, where it is made to pyruvate and then to glucose.

Description : In which condition pyruvate is produced, and when lactate? 

Last Answer : In aerobic condition pyruvate is produced. When oxygen is lacking, lactate is produced.

Description : . Vasodilatation occurs in: a. increased lactate concentration. b. decreased in skin temperature c. increased hydrogen ions concentration d. increased in potassium concentration

Last Answer : increased in potassium concentration

Description : In which one of the following processes CO2 is not released? (a) Aerobic respiration in plants (b) Aerobic respiration in animals (c) Alcoholic fermentation (d) Lactate fermentation

Last Answer : (d) Lactate fermentation

Description : The drug of choice for hypoparathyroidism is: A. Parathormone B. Calcium lactate C. Vitamin D D. Pamidronate

Last Answer : C. Vitamin D