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Biomolecules Test - 46

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Biomolecules Test - 46
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  • Question 1
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    Which one of the following will be largely different in various animal species ? 
  • Question 2
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    The fundamental building block of protein is 
  • Question 3
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    Activation energy is required for 
  • Question 4
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    In which process under metabolism energy is liberated because of respiration?
    Solution
    The catabolic processes are the reactions in which the large complex molecules are broken down to form the smaller molecules. The process is an exergonic process in which the energy is released due to the breaking of the bonds of the larger complex molecules. Respiration is the process in which the glucose molecule is broken down in order to release energy. 
    Thus, the correct answer is option A. 
  • Question 5
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    Which of the following structural formulae of two organic compounds is correctly identified along with its related function ?

    Solution
    Lecithin is a component of cell membrane and are mixtures of Glycerophospholipids including phosphatidylcholine, Phosphatidylethanolamine, phophosphatidylinositol ,Phosphatidylserine, Phosphatidic acid So, the correct answer is 'Lecithin - a component of cell membrane'
  • Question 6
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    Aleurone grains are ____________.
    Solution
    Aleurone grains are found in endosperms of monocots. They are rich in proteins which help in the growth and development of the seed. It is the outermost layer of the endosperm which is followed by inner starchy endosperm. During seed germination, the plant embryo produces the hormone gibberellin which triggers the aleurone cells to release α-amylase for the hydrolysis of starch, proteases, and storage proteins into the endosperm.
    So, the correct answer is option C.
  • Question 7
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    Conjugated proteins containing carbohydrates as prosthetic group are known as _____________.
    Solution
    Conjugated proteins containing carbohydrates as prosthetic group are known as Glycoproteins (mucoproteins) are conjugated protein having a simple or complex sugar (galactose) residue at then N-terminal end. Glycoprotein is found in egg white, mucin, cell membrane, saliva, synovial fluid, heparin.
    Hence B is the correct option. 
  • Question 8
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    What are the most diversed molecules in the cell ____________.
    Solution
    • Proteins show enormous diversity because of different proportions and sequences of twenty amino acid within the protein molecule. A large number of permutations and combinations of these amino acids are responsible for the unlimited variety of proteins. 
    • Proteins are the most abundant and most varied of the macromolecules having one or more polypeptides (chains of amino acids). The proteins constitute almost 50% of the total dry weight of the cell. Proteins maybe simple or conjugated. 
    • Among conjugated, proteins may be phosphoprotein, glycoprotein, nucleoprotein, chromoprotein, lipoprotein, flavoprotein, metallo protein etc. Functionally proteins may be structural protein, enzymes, hormones, respiratory pigment etc.
  • Question 9
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    Which protein is found in maximum amount ________________.
    Solution
    RUBISCO is the most abundant enzyme which is used to fix carbon during dark reaction of the photosynthesis. It is a primary acceptor of carbon dioxide during Calvin cycle. It is also known as Ribulose-1,5-bisphosphate carboxylase/oxygenase. 
    It fixes the carbon dioxide to 3-phosphoglycerate. It also accepts oxygen during photorespiration and forms phosphoglycolate and 3-phosphoglycerate.
    Collagen is an amino acid protein. It is a structural protein. It is mostly found in tendon, ligament, and skin. 90% collagen is present in the animal cells.
    So, the correct answer is option A.
  • Question 10
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    The "repeating unit" of glycogen is ____________.
    Solution
    Glycogen is a storage polysaccharide in animals. It is a homopolymer made up of repeating units of glucose only. Animals store glycogen in their liver and muscles. In humans, the most glycogen is found in the liver. 
    Thus, the correct answer is option C.
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