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Biomolecules Test - 54

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Biomolecules Test - 54
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  • Question 1
    1 / -0
    Only a little quantity of which of these can influence the rate of chemical reaction
    Solution
    Enzymes are proteins which accelerate the rate of the reaction. The substrate and product have different energy state. The energy gap between the substrate and the product is known as activation energy which is the minimum energy required to initiate a reaction. The enzymes lower the activation energy and lead to the faster conversion of substrate to the product. It accelerates the biochemical reaction so it is also known as a biocatalyst. Whereas, alkaloids do not influence the chemical reaction and small amount of hormones causes deficiency disorders.
    So, the correct answer is option B.
  • Question 2
    1 / -0
    Enzyme invertase hydrolyses
    Solution
     Invertase is an enzyme that catalyzes the hydrolysis (breakdown) of sucrose (table sugar) into fructose and glucose. The resulting mixture of fructose and glucose is called inverted sugar syrup. Related to invertases are sucrases.
    Thus the correct option is A.
  • Question 3
    1 / -0
    Hydrolysis of starch involves the use of the enzyme: 
    Solution

    Amylase is an enzyme that catalyzes the hydrolysis of starch into sugars. ... The pancreas and salivary gland produces amylase (alpha amylase) to hydrolyze dietary starch into disaccharides and trisaccharides which are converted by other enzymes to glucose to supply the body with energy.  Diastase is an amylase was the first enzyme to be discovered and isolated

  • Question 4
    1 / -0
    Which of the following test is performed by carbohydrates?
    Solution
    Molisch's test is a general test for carbohydrates, while ninhydrin test is given by all proteins. Nitroprusside test is given by proteins which contain$$-SH$$ group. Due to the presence of $$-CONH$$ linkage, alkaline solution of proteins give biuret test.
  • Question 5
    1 / -0
    Molecules which can also function as biocatalysts are
    Solution
    Ribozymes are also known as ribonucleic acid enzymes. These are RNA molecules which helps in the catalysis of a particular reaction. It was discovered in the year 1982. The RNA can act as both genetic material and can act as a biocatalyst. It acts as a part of ribosome which attaches to the amino acid during protein synthesis. Thomas R. Cech and Sidney Altman discovered catalytic properties of RNA. So, the correct answer is option B.
  • Question 6
    1 / -0
    Apoenzyme is a
    Solution
    Correct option: A
    Explanation:
    • Normally enzymes are regarded as holoenzymes.
    • Holoenzymes have two parts- apoenzyme and cofactors.
    • Apoenezyme is the protein subunit of the enzyme.
    • A cofactor is a non-protein part required for the proper functioning of the enzyme.
    Hence, apoenzyme is a "protein".
  • Question 7
    1 / -0
    Iron containing haeme is attached with globin of haemoglobin as
    Solution
    Prosthetic group is the non proteinaceous compound which is essential for the functioning of biological proteins. Metal ions such as Fe, Co, Mg etc. act as prosthetic group. Haem is a large iron (Fe) containing molecule which gives haemoglobin red colour. It is non proteinaceous part of haemoglobin and thus, it is a prosthetic group. It is responsible for binding to oxygen that is transported by haemoglobin in the blood streams during respiration.
    So, the correct answer is 'Prosthetic group'.
  • Question 8
    1 / -0
    Which of these is a non-protein enzyme?
    Solution
    Ribozymes are also known as ribonucleic acid enzymes. These are RNA molecules which helps in the catalysis of a particular reaction. The RNA can act as both genetic material and can act as a biocatalyst. It act as a part of ribosome which attaches to the amino acid during protein synthesis. Thomas R. Cech and Sidney Altman discovered catalytic properties of RNA. So, the correct answer is option D.
  • Question 9
    1 / -0
    Papain is obtained from
    Solution
    Carica papaya is a giant papaya plant. The tree latex and the fruit is rich in a protein known as papain. Papain is also known as papaya proteinase I. It is found in papaya. It breaks the peptide bond of the proteins.  It also hydrolyzes esters and amides. It is also used for tenderizing meat. It has the ability to digest the antibody into two 50 kDa Fab fragments and one 50kDa Fc fragment and prevent it from agglutination.
    So, the correct answer is option B.
  • Question 10
    1 / -0
    Baking powder is more commonly used to make cakes or bread "rise". Filler in baking powder is:
    Solution
    An improved combination of baking powder contains about 40% starch, 30% $$NaHCO_3$$, 20% $$NaAl(SO_4)_2$$ and 10% $$Ca(H_2PO_4)_2$$. 
    Here starch acts as filler. 
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