True Or False On Carbohydrates

The glycolytic activity is low when there is active gluconeogenesis.

Fructose is actively transported.

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

Cyclic AMP depresses phosphorylase activity.

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.

Disacchariduria results in the absence of disaccharidase.

Succinate dehydrogenase takes the help of the coenzyme NAD+.

Dihydroxyacetone phosphate is also converted to glucose in the liver.

Each glycogen molecule contains 5000 to 10000 glucose molecules.

The citric acid cycle is amphibolic in nature.

Pyruvate is converted to oxaloacetate by pyruvate decarboxylase.

Mannosamine is an important constituent of mucoprotein.

Muscle phosphorylase is affected by glucagon.

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

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.

Thyroid hormones may decrease the synthesis of adenylate cyclase.

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

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

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

Glycolysis in erythrocytes even under aerobic condition forms lactate.

Starch is a fructosan.

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

Hyaluronic acid does not occur in the skin.

Glucose on reduction yields mannitol.

The osazone is formed by phenylhydrazine only.

Glucuronic acid is not involved in detoxication reactions.

Disaccharides are absorbed and used in the body.

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

Oxaloacetate inhibits succinate dehydrogenase.

Galactose and fucose are also present in blood group substances.

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

Fluoride inhibits pyruvate dehydrogenase.

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

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

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

Aldolase requires a coenzyme for its activity.

Cis-trans isomerism occurs in compounds with double bonds.

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

Insulin stimulates phosphofructokinase.

Inulin produces colour with iodine.

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

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

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

The absorption of glucose is retarded in hypothyroidism.

Gluconic acid on heating produces lactones.

Ribose and Deoxyribose are important constituents of many coenzymes.

PGE5 at low concentration stimulates cGMP accumulation.

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

Sucrose is also said to be “invert sugar”.

Chondroitin sulphates have a marked capacity to hold water.

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

The aglycone may be -COOH containing substances.