True Or False On Carbohydrates

Disacchariduria results in the absence of disaccharidase.

In essential pentosuria, large quantities of L-xylulose appear in the urine.

Glucose-6-phosphate is not an important compound in the metabolic pathway.

Citrate synthetase forms citrate in the presence of the coenzyme CoA.

PGE5 at low concentration stimulates cGMP accumulation.

Pyruvate is converted to oxaloacetate by pyruvate decarboxylase.

Glucuronic acid is not involved in detoxication reactions.

Succinate dehydrogenase takes the help of the coenzyme NAD+.

Fluoride inhibits pyruvate dehydrogenase.

Fructose is actively transported.

In mammals, the liver and the muscles are the principal organs for gluconeogenesis.

Hyaluronic acid does not occur in the skin.

Dihydroxyacetone phosphate is also converted to glucose in the liver.

Ribose and Deoxyribose are important constituents of many coenzymes.

Chondroitin sulphates have a marked capacity to hold water.

S-acetyl lipoate reacts with coenzyme A in presence of dihydrolipoyl transacetylase.

The aglycone may be -COOH containing substances.

When the OH group around the carbon atom adjacent to the terminal primary alcohol carbon is on the right, the sugar is a member of L-series.

The osazone is formed by phenylhydrazine only.

Glycolysis in erythrocytes even under aerobic condition forms lactate.

Under anaerobic conditions, one molecule of glucose produces 8 ATP.

Glucose on reduction yields mannitol.

Mannosamine is an important constituent of mucoprotein.

Starch is a fructosan.

Muscle phosphorylase is affected by glucagon.

Cyclic AMP depresses phosphorylase activity.

In the maltose molecule, there is one 0-1, 2 glucosidic linkages.

The reduced NADP produced in HMP shunt is required for ketone bodies formation.

Insulin stimulates phosphofructokinase.

The glycolytic activity is low when there is active gluconeogenesis.

The separation of optically active isomers from a racemic mixture is called resolution.

Cis-trans isomerism occurs in compounds with double bonds.

One molecule of acetyl-CoA in TCA cycle for complete oxidation forms 12 ATP.

The amino sugars are formed by the replacement of the hydroxyl group attached to carbon atom 3 of the sugar by an amino group.

Gluconic acid on heating produces lactones.

The enzymes of the TCA cycle are located at the cytosol.

In amylopectin, each branch is at an interval of 24-30 glucose units.

Conversion of phosphorylase b to phosphorylase a signifies the mechanism for increasing glycogenolysis.

Inulin produces colour with iodine.

Disaccharides are absorbed and used in the body.

The citric acid cycle is amphibolic in nature.

The absorption of glucose is retarded in hypothyroidism.

CO2 formed in HMP shunt is utilized for the synthesis of fatty acids and purine bases, etc.

Aldolase requires a coenzyme for its activity.

Acetyl-CoA is permeable to pass through the mitochondrial membrane.

Galactose and fucose are also present in blood group substances.

Oxaloacetate inhibits succinate dehydrogenase.

Each glycogen molecule contains 5000 to 10000 glucose molecules.

Isomers formed as a result of interchange of the -OH and -H on carbon atoms 2, 3 and 4 of glucose are known as epimers.

Sucrose is also said to be “invert sugar”.

Thyroid hormones may decrease the synthesis of adenylate cyclase.

The glucogenic amino acids are converted to the intermediates of TCA cycle.