A level biology,  Biochemistry,  Daily Quiz,  O level biology

True Or False On Carbohydrates

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Biochemistry

True or False | Carbohydrates

Indicate “True” or “False” of the following:

1 / 52

Pyruvate is converted to oxaloacetate by pyruvate decarboxylase.

2 / 52

The osazone is formed by phenylhydrazine only.

3 / 52

Disacchariduria results in the absence of disaccharidase.

4 / 52

Fluoride inhibits pyruvate dehydrogenase.

5 / 52

Chondroitin sulphates have a marked capacity to hold water.

6 / 52

Ribose and Deoxyribose are important constituents of many coenzymes.

7 / 52

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

8 / 52

Glucuronic acid is not involved in detoxication reactions.

9 / 52

Galactose and fucose are also present in blood group substances.

10 / 52

Cis-trans isomerism occurs in compounds with double bonds.

11 / 52

PGE5 at low concentration stimulates cGMP accumulation.

12 / 52

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

13 / 52

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.

14 / 52

The citric acid cycle is amphibolic in nature.

15 / 52

The absorption of glucose is retarded in hypothyroidism.

16 / 52

Thyroid hormones may decrease the synthesis of adenylate cyclase.

17 / 52

Starch is a fructosan.

18 / 52

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

19 / 52

Cyclic AMP depresses phosphorylase activity.

20 / 52

Insulin stimulates phosphofructokinase.

21 / 52

Oxaloacetate inhibits succinate dehydrogenase.

22 / 52

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

23 / 52

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

24 / 52

Dihydroxyacetone phosphate is also converted to glucose in the liver.

25 / 52

Aldolase requires a coenzyme for its activity.

26 / 52

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

27 / 52

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

28 / 52

Fructose is actively transported.

29 / 52

Mannosamine is an important constituent of mucoprotein.

30 / 52

The aglycone may be -COOH containing substances.

31 / 52

Sucrose is also said to be “invert sugar”.

32 / 52

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

33 / 52

Disaccharides are absorbed and used in the body.

34 / 52

Succinate dehydrogenase takes the help of the coenzyme NAD+.

35 / 52

Gluconic acid on heating produces lactones.

36 / 52

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

37 / 52

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.

38 / 52

Glucose on reduction yields mannitol.

39 / 52

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

40 / 52

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

41 / 52

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

42 / 52

Hyaluronic acid does not occur in the skin.

43 / 52

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

44 / 52

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

45 / 52

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

46 / 52

Glycolysis in erythrocytes even under aerobic condition forms lactate.

47 / 52

Inulin produces colour with iodine.

48 / 52

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

49 / 52

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

50 / 52

The glycolytic activity is low when there is active gluconeogenesis.

51 / 52

Each glycogen molecule contains 5000 to 10000 glucose molecules.

52 / 52

Muscle phosphorylase is affected by glucagon.

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