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 Multiple Choice QuestionsMultiple Choice Questions

491.

Which of the following statement is false?

  • Ca2+ ions are important in blood clotting

  • Ca2+ ions are not important in maintaining the regular beating of the heart.

  • Mg2+ ions are important in the green parts of plants

  • Mg2+ ions are important in the green parts of plants

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492.

The correct statement regarding RNA and DNA, respectively is

  • The sugar component in RNA is ribose and sugar component in DNA is 2' deoxyribose

  • The sugar component in RNA is arabinose and the sugar component in DNA is ribose

  • The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose

  • The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose

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493.

Which one given below is a non - reducing sugar?

  • Lactose

  • Glucose

  • Sucrose

  • Sucrose

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494.

The function of 'sodium pump' is a biological process operating in each and every cell of all animal. Which of the following biologically important ions is also a constituent of this pump?

  • Ca2+

  • Mg2+

  • K+

  • Fe2+

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495.

D-(+)- glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime.The structure of the oxime would be

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496.

Which one of the following statement is incorrect about enzyme catalysis?

  • Enzymes are mostly proteinous in nature

  • Enzyme action is specific

  • Enzymes are denaturated by ultraviolet rays and at high temperature

  • Enzymes are denaturated by ultraviolet rays and at high temperature


D.

Enzymes are denaturated by ultraviolet rays and at high temperature

Most of the enzymes have proteinous nature. They are highly specific and get denaturated by high temperature or UV rays. At optimum temperature, which is generally in between 25-35o, enzyme activity is maximum.

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497.

Deficiency of vitamin Bcauses the disease

  • convulsions

  • beri-beri

  • cheilosis

  • cheilosis

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498.

Which one of the following sets of monosaccharides forms sucrose?

  • α-D-galactopyranose and α-D- glucopyranose
  • α-D-glucopyranose and β-D-fructofuranose
  • β-D-glucopyranose and α-D-fructofuranose
  • β-D-glucopyranose and α-D-fructofuranose
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499.

Which one of the following statements is not true regarding (+) lactose?

  • (+) lactose is a  β - glycoside formed by the union of a molecule of D (+) galactose

  • (+) lactose is a reducing sugar and does not exhibit mutarotation

  • (+) lactose, C12H22O11 contains 8 - OH groups

  • (+) lactose, C12H22O11 contains 8 - OH groups

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500.

Which of the following is not a fat soluble vitamin?

  • Vitamin- B - complex

  • Vitamin -D

  • Vitamin -E

  • Vitamin -E

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