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Multiple Choice Questions

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

634 Views

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

1016 Views

Deficiency of vitamin Bcauses the disease

  • convulsions

  • beri-beri

  • cheilosis

  • cheilosis

411 Views

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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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

482 Views

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
468 Views

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

978 Views

Which one given below is a non - reducing sugar?

  • Lactose

  • Glucose

  • Sucrose

  • Sucrose

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Which of the following is not a fat soluble vitamin?

  • Vitamin- B - complex

  • Vitamin -D

  • Vitamin -E

  • Vitamin -E

268 Views

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+

1198 Views

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