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Biomolecules Test - 12

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Biomolecules Test - 12
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  • Question 1
    1 / -0
    Match the metals (Column I) with the coordination
    compound(s) / enzyme(s) (Column II) 
    Column-IColumn-II
    (A)Co (i)Wilkinson catalyst
    (B)Zn(ii)Chlorophyll 
    (C)Rh(iii)Vitamin $$B_{12}$$ 
    (D)Mg(iv)Carbonic anhydrase 
    Solution
    (i) Wilkinson catalyst : $$RhCl(PPh_3)_3$$

    (ii) Chlorophyll : $$C_{55}H_{72}O_5N_4Mg $$

    (iii) Vitamin $$B_{12}$$ (also known as cyanocobalamin) contain cobalt.

    (iv) Carbonic anhydrase contains a zinc ion.
  • Question 2
    1 / -0
    Which of the following does not contain metal?
    Solution
    Glycoproteins do not contain metal. Glycoproteins are proteins that contain oligosaccharide chains covalently attached to polypeptide side-chains. The carbohydrate is attached to the protein. Glycoproteins are often important integral membrane proteins, where they play a role in cell-cell interactions. 
  • Question 3
    1 / -0
    Which one is the most abundant protein in the animal world?
    Solution
    Correct option: C

    Explanation:
    • The most abundant protein in the animal world is Collagen. It is found in the extracellular matrix of connective tissues like cartilage, bones, tendons, ligaments, and skin.
    • Trypsin is an enzyme which hydrolyses proteins into smaller peptides in the small intestine. It is produced as the inactive zymogen trypsinogen in the pancreas.
    • Haemoglobin is a iron-containing oxygen-transport protein found in red blood cells.
    • Insulin is a peptide hormone produced by beta cells of the pancreatic islets in response to high level of blood glucose.
      Thus, Option C is correct.
  • Question 4
    1 / -0
    Proteoglycan is a part of which polysaccharide in cartilages?
    Solution
    Chondroitin contains repeating unit of alternating sugars N-acetylgalactosamine and glucuronic acid. It mostly attaches to proteins as part of a proteoglycan. A chondroitin chain can have over 100 individual sugars, each of which can be sulfated in variable positions and quantities. Chondroitin sulfate is an important structural component of cartilage and provides much of its resistance to compression.
  • Question 5
    1 / -0
    Which of the following protein is found in maximum amount?
    Solution
    RUBISCO stands for ribulose-1, 5-bis phosphate carboxylase oxygenase. It is the carboxylating enzyme of dark reaction in C3 plants. RUBISCO is the most abundant protein in biosphere occurring in all green parts of photosynthetic plants.
  • Question 6
    1 / -0
    The link between successive generation is provided by
    Solution
    The link between successive generation is provided by nucleic acids. Nucleic acids are polymolecules, or large biomolecules, essential for all known forms of life. Nucleic acids, which include DNA and RNA, are made from monomers known as nucleotides. Together with proteins, nucleic acids are the most important biological macromolecules. They are found in abundance in all living things, where they function in encoding, transmitting and expressing genetic information, in other words, information is conveyed through the nucleic acid sequence, or the order of nucleotides within a DNA or RNA molecule. 
    So, the correct answer is option D.
  • Question 7
    1 / -0
    For growth of body and its repair one needs which of the following component?
    Solution
    Proteins (polymers of amino acids) are the most important biomolecules. They are the primary body building biomolecules. Carbohydrates are the primary fuel for cellular respiration. Fats are important for biological membranes, long term energy storage, insulation, hormones etc. Vitamins are required in extremely minute quantities for proper cellular metabolism.
  • Question 8
    1 / -0
    Variations in proteins are due to
    Solution
    • Proteins are polymers of amino acids. A number of amino acids are joined together by peptide bonds to form proteins. 
    • The sequence of amino acids is decided by the sequence of nucleotides in DNA. The sequence of nucleotides in DNA determines the sequence of nucleotides in mRNA. 
    • The sequence of nucleotides in mRNA decides the sequence of amino acids in the protein.
    So, the correct answer is option A.
  • Question 9
    1 / -0
    Nucleic acids are polymer of
    Solution
    • Nucleic acids are long-chain polymers of nucleotides. The nucleotides, in turn, are phosphoric acid esters of nucleosides which mainly consist of a nitrogenous base, sugar, and phosphate. 
    • The nitrogenous base includes purines and pyrimidines while the sugar contains ribose and deoxyribose sugar. phosphate is formed of phosphoric acid.
    So, the correct answer is option A.
  • Question 10
    1 / -0
    The units of proteins which unite in long chains to form proteins, are called as
    Solution
    Proteins are macromolecules made up of monomers called amino acids. The amino acid residues are joined together by peptide bonds to form proteins. The amino acids are compounds having both amino group and a carboxylic group bonded to same carbon atom called $$\alpha$$-carbon atom. Other atoms bonded to $$\alpha$$-carbon atom are a variable substituent group and a hydrogen atom.
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