Biomolecules

Multiple Choice Questions

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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+

C.

K+

The sodium pump is also known as a sodium Potassium pump. This pump is important contributor to action potential produced by nerve cells. The process of moving sodium potassium ions across the cell membranes is active transport process involving the hydrolysis of ATP to provide the necessary energy. 

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    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

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    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 of the following is not a fat soluble vitamin?

    • Vitamin- B - complex

    • Vitamin -D

    • Vitamin -E

    • Vitamin -E

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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

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    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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    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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    Which one given below is a non - reducing sugar?

    • Lactose

    • Glucose

    • Sucrose

    • Sucrose

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    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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    Deficiency of vitamin B1 causes the disease

    • convulsions

    • beri-beri

    • cheilosis

    • cheilosis

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