True Or False On Carbohydrates

Dihydroxyacetone phosphate is also converted to glucose in the liver.

Hyaluronic acid does not occur in the skin.

Cyclic AMP depresses phosphorylase activity.

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

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

Aldolase requires a coenzyme for its activity.

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

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

The osazone is formed by phenylhydrazine only.

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

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

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

The absorption of glucose is retarded in hypothyroidism.

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

Thyroid hormones may decrease the synthesis of adenylate cyclase.

The aglycone may be -COOH containing substances.

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

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

Disaccharides are absorbed and used in the body.

Muscle phosphorylase is affected by glucagon.

PGE5 at low concentration stimulates cGMP accumulation.

Pyruvate is converted to oxaloacetate by pyruvate decarboxylase.

Glucuronic acid is not involved in detoxication reactions.

Insulin stimulates phosphofructokinase.

Ribose and Deoxyribose are important constituents of many coenzymes.

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.

Sucrose is also said to be “invert sugar”.

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

Oxaloacetate inhibits succinate dehydrogenase.

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

Glycolysis in erythrocytes even under aerobic condition forms lactate.

Fructose is actively transported.

Galactose and fucose are also present in blood group substances.

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.

Gluconic acid on heating produces lactones.

Disacchariduria results in the absence of disaccharidase.

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

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

Mannosamine is an important constituent of mucoprotein.

Fluoride inhibits pyruvate dehydrogenase.

Succinate dehydrogenase takes the help of the coenzyme NAD+.

Cis-trans isomerism occurs in compounds with double bonds.

Glucose on reduction yields mannitol.

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

The citric acid cycle is amphibolic in nature.

Chondroitin sulphates have a marked capacity to hold water.

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

Starch is a fructosan.

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

The glycolytic activity is low when there is active gluconeogenesis.

Inulin produces colour with iodine.

Each glycogen molecule contains 5000 to 10000 glucose molecules.