Absorption of vitamin-B;» in human requires 'P' glycoprotei

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 Multiple Choice QuestionsMultiple Choice Questions

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


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


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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


B.

P - Intrinsic factor; Q - Stomach

Intrinsic Factor (IF) also known as gastric Intrinsic Factor (GIF), is a glycoprotein produced by the parietal cells of the stomach. It is present in the gastric juice as well as gastric mucous membrane. 

Upon entry into the stomach, vitamin-B12 becomes bound to haptocorrin (a glycoprotein.) The resulting complex enters the duodenum, where pancreatic enzymes digest haptocorrin. In the less acidic environment of the small intestine, B12 can then bind to intrinsic factor.


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