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Biomolecules Test - 71

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Biomolecules Test - 71
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  • Question 1
    1 / -0
    The most abundant protein is
    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.
    So, the correct answer is option A.
  • Question 2
    1 / -0
    Which of the following enzymes is present in animals like cows, buffaloes, etc to digest compound like paper, cloth, etc.?
    Solution
    Animals like cows, buffaloes contain certain symbiotic an aerobic bacteria in the flora of the rumen and these bacteria produce enzyme called cellulases that help the micro-organism to break down cellulose.
  • Question 3
    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 4
    1 / -0
    A simple enzyme is
    Solution
    Succinate dehydrogenase is a enzyme which is present in the inner mitochondrial membrane. It plays an important role in citric acid cycle and the electron transport chain.
    It catalyzes the oxidation of succinate to fumarate. It is a conjugated protein as it has flavo protein which has FMN or FAD molecule as a prosthetic group.
    So, the correct answer is option A.
  • Question 5
    1 / -0
    Energy liberated during respiration is stored as
    Solution
    Cellular respiration requires oxidation of organic substrates for the liberation of energy. The energy released is stored in every living cell in the form of a universal high energy molecule called ATP or adenosine triphosphate.
    So the answer is 'ATP'.
  • Question 6
    1 / -0
    Arginosuccinase is a .............. enzyme.
    Solution
    Hydrolase is a class of enzyme which act as biochemical catalysts that use water to break chemical bonds.
    Ligase is an enzyme which catalyses the joining of two large molecules by forming a new bond generally accompanied by hydrolysis of a small chemical group.
    Lyase is an enzyme which catalyses the breaking of C-C, C-O and C-N bonds by any methods other than hydrolysis or oxidation. Arginosuccinase is an enzyme which catalyses the breakdown of argininosuccinate producing arginine and fumarate.
    Oxido-reductase is an enzyme which catalyses the transfer of electrons from the molecule of the reductant which acts as the electron donor to another molecule of the oxidant which accepts the electron.
    So, the correct answer is 'Lyase'.
  • Question 7
    1 / -0
    The efficiency of an enzyme to catalyse a reaction is due to its capacity to:
    Solution
    Enzymes bind the substrate and hold it in such a way that allows the reaction to happen in an efficient manner. This lowers down the amount of energy required for the reaction to occur, i.e, the activation energy, as a result of which the rate of the reaction is increased significantly.
  • Question 8
    1 / -0
    ATP is
    Solution
    Adenosine triphosphate is the long form of ATP, it is the complex organic chemical that participates in many processes. Found in all forms of life, ATP is often referred to as the "molecular unit of currency" of intracellular energy transfer.
    So, the correct option is C.
  • Question 9
    1 / -0
    Bond found between two molecules of carbohydrate is
    Solution
    A glycosidic bond or glycosidic linkage is a type of covalent bond that joins a carbohydrate (sugar) molecule to another group, which may or may not be another carbohydrate. So, the correct answer is option C.
  • Question 10
    1 / -0
    Enzyme involved in transfer of electrons belongs to 
    Solution
    Dehydrogenase is an enzyme which participates in the oxidoreductase reaction by using an electron acceptor. It is involved in the transfer of electrons because it oxidizes a substrate by reducing it which means it transfers the electron from the substrate to an electron acceptor. Succinate dehydrogenase is an enzyme which is present in the inner mitochondrial membrane. It catalyzes the oxidation of succinate to fumarate.
    So, the correct answer is option D.
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