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141.

A phosphoglyceride is always made up of

  • only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

  • only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

  • a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

  • a saturated or unsaturated fatty acid esterified to a phosphate group, which is also attached to a glycerol molecule


C.

a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

Phosphoglycerides are esters of two fatty acids, phosphoric acid and a trifunctional alcohal glycerol.

A fat is formed of two kinds of smaller molecules, i.e., glycerol and fatty acids. Fatty acid molecules join together to glycerol by an ester linkage. A fatty acid has a long carbon skeleton, usually 16 or 18 carbon atoms in length. It there are no double bonds between carbon atoms composing the chain, then as many hydrogen atoms as possible are bonded to the carbon skeleton. Hence, this is known as saturated fatty acids. Unsaturated fatty acid has one or more double bonds.


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142.

Macromolecule chitin is

  • nitrogen containing polysaccharide

  • phosphorus containing polysaccharide

  • sulphur containing polysaccharide

  • simple polysaccharide


143.

The essential chemical components of many coenzymes are

  • proteins

  • nuclei acids

  • carbohydrates

  • vitamins


144.

One molecule of triglyceride is produced using

  • one fatty acid and one glycerol

  • one fatty acid and three glycerols

  • three fatty acids and three glycerols

  • three fatty acids and one glycerol


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145.

Glutenin is an important protein in

  • potato

  • wheat

  • soyabean

  • spinach


146.

Which one of the following is enriched with a non-reducing sugar?

  • Grapes

  • Germinating barley grains

  • Table sugar

  • Mother's milk


147.

Which of the following statements is wrong for sucrose?

  • It is a disaccharide

  • It is a non-reducing sugar

  • It accumulates in the cytoplasm

  • It is comprised of maltose and fructose


148.

The protein component of a holoenzyme is known as

  • coenzyme

  • cofactor

  • prosthetic group

  • apoenzyme


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149.

Km is

  • product

  • enzyme

  • constant

  • unit


150.

Absorption of vitamin-B;» in human requires 'P' glycoprotein secreted from 'Q'. The correct choices of P and Q are

  • P - Extrinsic factor; Q - Stomach

  • P - Intrinsic factor; Q - Stomach

  • P - Intrinsic factor; Q - Small intestine

  • P - Exopolysaccharide; Q - Small Intestine


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