A sugar can react with an alcohol to form an acetal known as glycoside (a) true

Question

A sugar can react with an alcohol to form an acetal known as glycoside (a) true (b) false The fluidity of the membrane is increased in the presence of unsaturated fatty acids (a) True (b) False In higher animals arachidonic acid reduces membrane fluidity by preventing the movement of fixity acyl chains (a) True (b) False. The proteins which can be extracted from erytheocyte membranes after treatment with detergents or organic solvents are called (a) Peripheral proteins (b) Integral proteins (c) Endoplasmic proteins (d) None of the above. A transmembrane protein is defined as ___ Heptose is an example of an oligosaccharide (a) True (b) False

Explanation / Answer

35. (a) True

This is because sugar react with an alcohol in the presence of an acid to form an acetal known as glycoside.

36. (a) True

The fluidity of the membrane is increased in the presence of unsaturated fatty acids because double bonds in unsaturated fatty acid can't pack tightly. They push adjacent phospholipid molecules away, which helps maintain fluidity in the membrane.

37. (a) True

In higher animals, arachidonic acid reduces membrane fluidity by preventing the movement of fatty acyl chains.

38. (b) Integral proteins

The proteins which can be extracted from erythrocyte membranes after treatment with detergents or organic solvents are called integral proteins. They are very firmly associated with the membrane and can be removed only by detergents, organic solvents that interfere with hydrophobic interactions.

39. A transmembrane protein is a type of integral membrane protein which function as gateways to permit the transport of specific substances across the biological membrane. They are polytopic proteins that aggregate and precipitate in water. Movement of a substance through the membrane frequently undergo significant conformational changes.

40. (b) False

Heptose is a monosacccharide with seven carbon atoms. But oligosaccharide is a polymer.

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