Quick Biochemistry - Enzymes (Section 12)

  • 1
    In the reaction Glucose + ATP → Glucose-6P + ADP, to what class of enzymes does the catalyst belong?
    Respuesta
    (C)
    Oxidoreductases
  • 2
    Which type of enzyme is primarily involved in transferring electrons?
    Respuesta
    (A)
    Desmolase
  • 3
    What is a prime example of an enzyme that functions outside of a cell?
    Respuesta
    (C)
    Succinic dehydrogenase
  • 4
    Which trace element regulates the action of Nitrate reductase?
    Respuesta
    (A)
    Fe
  • 5
    Which enzyme demonstrates both carboxylase and oxygenase activity?
    Respuesta
    (B)
    RuBP carboxylase
  • 6
    A metabolic pathway can best be described as a
    Respuesta
    (B)
    Sequence of enzyme facilitated chemical reactions
  • 7
    What is the energy needed to initiate an enzymatic reaction called?
    Respuesta
    (C)
    Activation energy
  • 8
    Approximately what percentage of a cell's total enzymes are found exclusively within the mitochondria?
    Respuesta
    (B)
    70%
  • 9
    An elevated level of creatine phosphokinase isoenzyme is a key indicator of what medical condition?
    Respuesta
    (C)
    Myocardial infarction
  • 10
    What type of substance prevents an enzyme from functioning by attaching to its active location?
    Respuesta
    (A)
    Competitive inhibitor
  • 11
    What is a coenzyme?
    Respuesta
    (D)
    All of these
  • 12
    What structures make up an enzyme's active site?
    Respuesta
    (A)
    R group of amino acids
  • 13
    The carbonic anhydrase enzyme has a maximum turnover number of 36 million. Which of the following enzymes has the lowest turnover number?
    Respuesta
    (B)
    Lysozyme
  • 14
    Where are digestive enzymes primarily located within a cell?
    Respuesta
    (B)
    Ribosomes
  • 15
    What is the term for the substrate concentration at which an enzyme reaches half of its maximum velocity?
    Respuesta
    (B)
    Michaelis-Menton constant
  • 16
    Which enzyme breaks down starch?
    Respuesta
    (D)
    Diastase
  • 17
    What type of enzymes function within cells or mitochondria?
    Respuesta
    (A)
    Endoenzymes
  • 18
    Which enzymes are found in the mitochondrial membrane?
    Respuesta
    (A)
    Flavoproteins and cytochromes
  • 19
    Which enzyme is considered a marker for the mitochondria?
    Respuesta
    (C)
    Succinic dehydrogenase
  • 20
    Which enzyme is used in polymerase chain reaction (PCR)?
    Respuesta
    (D)
    Endonuclease
  • 21
    What substance is known to enhance the activity of microsomal enzymes?
    Respuesta
    (D)
    Glutethamide
  • 22
    In biological systems, which molecule is directly responsible for guiding the creation of proteins?
    Respuesta
    (A)
    DNA
  • 23
    What is the name of the enzyme found in tears that has the ability to fight against bacteria?
    Respuesta
    (C)
    Lysozyme
  • 24
    Which of the following substances specifically blocks the action of carbonic anhydrase within the internal space of cells?
    Respuesta
    (B)
    Acetazolamide
  • 25
    Which co-enzyme is most closely associated with the transfer of molecular groups?
    Respuesta
    (A)
    CoA
  • 26
    Which co-enzyme's structure includes a ring that is not made up of the same kind of atoms?
    Respuesta
    (C)
    Sugar Phosphate
  • 27
    Which co-enzyme is involved in the transfer of hydrogen atoms?
    Respuesta
    (D)
    ATP
  • 28
    The breakdown of proteins with the help of enzymes yields amino acids that are configured as
    Respuesta
    (C)
    L
  • 29
    Which coenzyme is essential for the function of transaminase?
    Respuesta
    (B)
    FADT
  • 30
    The urea synthesis process mainly takes place inside which part of the liver cell?
    Respuesta
    (B)
    Microsomes
  • 31
    What is the role of bile salts in fat digestion?
    Respuesta
    (B)
    Lipase's function
  • 32
    Which of the following is NOT involved in the TCA cycle as an intermediate?
    Respuesta
    (B)
    Pyruvate
  • 33
    During gluconeogenesis (lactic acid to glucose), certain glycolysis reactions are bypassed. Which enzyme is NOT involved in this process?
    Respuesta
    (B)
    Phosphoenol pyruvate carboxy kinase
  • 34
    In a typical human at rest, where is the majority of blood glucose utilized?
    Respuesta
    (B)
    Brain
  • 35
    Which molecule regulates the enzyme glycogen synthase?
    Respuesta
    (C)
    Glucose-6-PO4
  • 36
    What substance specifically inhibits succinate dehydrogenase?
    Respuesta
    (B)
    Malonate