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biochemistry yeni 361/423

biochemistry yeni 361/423
63問 • 2年前
  • Alper Gürel
    • 通報

    問題一覧

  • 1

    Which of the following is not coenzyme?

    pyridoxine

  • 2

    Determine the enzyme with the relative specificity.

    hexokinase

  • 3

    Substrates of proteases are:

    proteins

  • 4

    What is the basis for the classification of enzymes?

    type of catalyzing reaction

  • 5

    Reduced concentration of which substances increases the speed of reaction with participation of proteases?

    amino acids

  • 6

    Which of the following functional groups of enzyme molecule participate in catalytic process? 1) SH- group of cysteine 2) Imidazole group of histidine molecule 3) Hydroxyl group of serine and threonine 4) COOH group of glutamic and aspartic acid

    all

  • 7

    What determines the catalytic activity and the specificity of enzyme?

    active site

  • 8

    What does not determine the rate of enzymatic reaction?

    the molecular mass of enzyme

  • 9

    Active site of complex enzymes consists of:

    functionally active amino acids

  • 10

    Determine the enzyme (I), which catalyzes the following reaction: Carbamide + H2O→ 2 NH3 + CO2; and its specificity (II):

    urease-absolute

  • 11

    How is enzyme different from inorganic catalyst?

    It is highly specific

  • 12

    Which one is not the coenzyme of transferases?

    FMN

  • 13

    What does the non-competitive inhibitor bind to?

    enzyme substrate complex

  • 14

    Lipase, α-amylase and trypsin belong to the class of:

    hydrolases

  • 15

    Which of the following classes of enzymes promotes the intramolecular bond cleavage with the participation of water?

    hydrolases

  • 16

    Which of the following classes of enzymes catalyzes intramolecular changes?

    isomerases

  • 17

    The other name of synthases is:

    lyases

  • 18

    Which of the following enzymes catalyzes the following reaction: R – R1 + H OD R – H + R1OH. 2

    hydrolase

  • 19

    Which class does the enzyme, which catalyzes the following reaction, belong to? CH3COOH+HS-CоА + ATP→CH3CO-CоА + АMP + H4P207

    lygases

  • 20

    Which class does the enzyme, which catalyzes the following reaction, belong to? Glutamic acid + H2O + NAD+ → α-KGA + NH3+ NADH2

    oxidoreductase

  • 21

    Select coenzymes which have vitamin nature:

    ubiquinone, TPP, NAD+, carnitine

  • 22

    Activity of which enzyme increases in blood in acute pancreatitis?

    lipase

  • 23

    Inhibitor of which enzyme in blood is contrical?

    trypsin

  • 24

    How are called enzymes which have ion metals as the regular part of active site?

    true metalloenzymes

  • 25

    Determine the compliance for moniiodacetamid (I) inhibitor type and functional group (II) related with it.

    irreversible(I) sulfhydryl(II)

  • 26

    What does pH in the enzyme molecule act on?

    ionization degree of functional groups

  • 27

    Activity of which isoenzyme of lactate dehydrogenase increases in blood in myocardial infarction (I) and Botkin's disease (II)?

    LDH-1 LDH-5

  • 28

    Determine the reason of the change of cholinesterase activity under optimal conditions change pH- 5,0 (I), t=50 °C (II):

    change in the conformation of the enzyme molecule

  • 29

    Non-protein part of complex enzymes is called ?

    coenzyme

  • 30

    Enzymes are classified into ?

    6

  • 31

    Which site of enzyme provides conversion of substrate?

    catalytic site

  • 32

    What is not observed under physiological conditions?

    retro inhibition

  • 33

    Reason of enzymes inactivation at the temperature more than 50°C is:

    denaruration

  • 34

    Select the correct arrangement of pH optimum for the following enzymes: pepsin (I), α-amylase (II), ximotripsin (III).

    I < II < III

  • 35

    Which amino acid in the enzyme molecule binds with diisopropyl fluorophosphate (DFP) as inhibitor?

    serine

  • 36

    Which value of pH activity of pepsin is maximum?

    1,5-2,5

  • 37

    397.

    urease, the absolute

  • 38

    What is the unit of enzyme activity in the International System of Units?

    katal

  • 39

    Which enzyme is used in the diagnosis of liver diseases?

    alkaline phosphatase

  • 40

    Which enzyme drug stops the development of RNA- containing viruses?

    ribonuclease

  • 41

    401

    pyruvate carboxylase-FAD-pyruvic acid

  • 42

    402

    3 2 4 1

  • 43

    Which of the following belong to the iron and sulfur- containing flavoproteins?

    xanthine oxidase, aldehyde oxidase, succinate dehydrogenase

  • 44

    Which factors determine the speed of the enzyme reaction?

    substrate concentration

  • 45

    405

    e a d b c

  • 46

    406

    c d b a

  • 47

    407

    2,3,5. 1,4

  • 48

    Which enzyme class does catalase belong to?

    oxidoreductases

  • 49

    For which organ does the LDH1 have a diagnostic value?

    heart muscle

  • 50

    410

    quantity of enzyme

  • 51

    Which enzyme belongs to oxidoreductases class?

    succinate dehydrogenase

  • 52

    Which class of enzymes catalyzes the decomposition reaction without the presence of water?

    lyases

  • 53

    Which curve reflects the dependence of the rate of enzymatic reaction from the substrate concentration?

    3

  • 54

    How are called enzymes, catalyzing the same reactions, but having different physicochemical properties?

    isoenzymes

  • 55

    The curve reflects dependence of the rate of enzymatic reaction from:

    concentration of substrate with the presence of allosteric enzymes

  • 56

    Which curve reflects the dependence of rate of enzymatic reaction from pH?

    1

  • 57

    Which group of catalytic site of enzyme is the action of mercury ions associated with as inhibitors?

    thiol group of cysteine

  • 58

    Which coenzyme contains a disulfide group?

    glutathione

  • 59

    With residues of which amino acids does phosphoric acid bind with ether bond in the polypeptide chain in modification of enzyme with phosphorylation?

    serine, threonine

  • 60

    420

    hydrolase proserin

  • 61

    Holoenzymes is ?

    apoenzyme+coenzyme

  • 62

    Belong to lyases:

    fumarate hydrotase

  • 63

    Which of the following enzymes is not a protein?

    ribozyme

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    問題一覧

  • 1

    Which of the following is not coenzyme?

    pyridoxine

  • 2

    Determine the enzyme with the relative specificity.

    hexokinase

  • 3

    Substrates of proteases are:

    proteins

  • 4

    What is the basis for the classification of enzymes?

    type of catalyzing reaction

  • 5

    Reduced concentration of which substances increases the speed of reaction with participation of proteases?

    amino acids

  • 6

    Which of the following functional groups of enzyme molecule participate in catalytic process? 1) SH- group of cysteine 2) Imidazole group of histidine molecule 3) Hydroxyl group of serine and threonine 4) COOH group of glutamic and aspartic acid

    all

  • 7

    What determines the catalytic activity and the specificity of enzyme?

    active site

  • 8

    What does not determine the rate of enzymatic reaction?

    the molecular mass of enzyme

  • 9

    Active site of complex enzymes consists of:

    functionally active amino acids

  • 10

    Determine the enzyme (I), which catalyzes the following reaction: Carbamide + H2O→ 2 NH3 + CO2; and its specificity (II):

    urease-absolute

  • 11

    How is enzyme different from inorganic catalyst?

    It is highly specific

  • 12

    Which one is not the coenzyme of transferases?

    FMN

  • 13

    What does the non-competitive inhibitor bind to?

    enzyme substrate complex

  • 14

    Lipase, α-amylase and trypsin belong to the class of:

    hydrolases

  • 15

    Which of the following classes of enzymes promotes the intramolecular bond cleavage with the participation of water?

    hydrolases

  • 16

    Which of the following classes of enzymes catalyzes intramolecular changes?

    isomerases

  • 17

    The other name of synthases is:

    lyases

  • 18

    Which of the following enzymes catalyzes the following reaction: R – R1 + H OD R – H + R1OH. 2

    hydrolase

  • 19

    Which class does the enzyme, which catalyzes the following reaction, belong to? CH3COOH+HS-CоА + ATP→CH3CO-CоА + АMP + H4P207

    lygases

  • 20

    Which class does the enzyme, which catalyzes the following reaction, belong to? Glutamic acid + H2O + NAD+ → α-KGA + NH3+ NADH2

    oxidoreductase

  • 21

    Select coenzymes which have vitamin nature:

    ubiquinone, TPP, NAD+, carnitine

  • 22

    Activity of which enzyme increases in blood in acute pancreatitis?

    lipase

  • 23

    Inhibitor of which enzyme in blood is contrical?

    trypsin

  • 24

    How are called enzymes which have ion metals as the regular part of active site?

    true metalloenzymes

  • 25

    Determine the compliance for moniiodacetamid (I) inhibitor type and functional group (II) related with it.

    irreversible(I) sulfhydryl(II)

  • 26

    What does pH in the enzyme molecule act on?

    ionization degree of functional groups

  • 27

    Activity of which isoenzyme of lactate dehydrogenase increases in blood in myocardial infarction (I) and Botkin's disease (II)?

    LDH-1 LDH-5

  • 28

    Determine the reason of the change of cholinesterase activity under optimal conditions change pH- 5,0 (I), t=50 °C (II):

    change in the conformation of the enzyme molecule

  • 29

    Non-protein part of complex enzymes is called ?

    coenzyme

  • 30

    Enzymes are classified into ?

    6

  • 31

    Which site of enzyme provides conversion of substrate?

    catalytic site

  • 32

    What is not observed under physiological conditions?

    retro inhibition

  • 33

    Reason of enzymes inactivation at the temperature more than 50°C is:

    denaruration

  • 34

    Select the correct arrangement of pH optimum for the following enzymes: pepsin (I), α-amylase (II), ximotripsin (III).

    I < II < III

  • 35

    Which amino acid in the enzyme molecule binds with diisopropyl fluorophosphate (DFP) as inhibitor?

    serine

  • 36

    Which value of pH activity of pepsin is maximum?

    1,5-2,5

  • 37

    397.

    urease, the absolute

  • 38

    What is the unit of enzyme activity in the International System of Units?

    katal

  • 39

    Which enzyme is used in the diagnosis of liver diseases?

    alkaline phosphatase

  • 40

    Which enzyme drug stops the development of RNA- containing viruses?

    ribonuclease

  • 41

    401

    pyruvate carboxylase-FAD-pyruvic acid

  • 42

    402

    3 2 4 1

  • 43

    Which of the following belong to the iron and sulfur- containing flavoproteins?

    xanthine oxidase, aldehyde oxidase, succinate dehydrogenase

  • 44

    Which factors determine the speed of the enzyme reaction?

    substrate concentration

  • 45

    405

    e a d b c

  • 46

    406

    c d b a

  • 47

    407

    2,3,5. 1,4

  • 48

    Which enzyme class does catalase belong to?

    oxidoreductases

  • 49

    For which organ does the LDH1 have a diagnostic value?

    heart muscle

  • 50

    410

    quantity of enzyme

  • 51

    Which enzyme belongs to oxidoreductases class?

    succinate dehydrogenase

  • 52

    Which class of enzymes catalyzes the decomposition reaction without the presence of water?

    lyases

  • 53

    Which curve reflects the dependence of the rate of enzymatic reaction from the substrate concentration?

    3

  • 54

    How are called enzymes, catalyzing the same reactions, but having different physicochemical properties?

    isoenzymes

  • 55

    The curve reflects dependence of the rate of enzymatic reaction from:

    concentration of substrate with the presence of allosteric enzymes

  • 56

    Which curve reflects the dependence of rate of enzymatic reaction from pH?

    1

  • 57

    Which group of catalytic site of enzyme is the action of mercury ions associated with as inhibitors?

    thiol group of cysteine

  • 58

    Which coenzyme contains a disulfide group?

    glutathione

  • 59

    With residues of which amino acids does phosphoric acid bind with ether bond in the polypeptide chain in modification of enzyme with phosphorylation?

    serine, threonine

  • 60

    420

    hydrolase proserin

  • 61

    Holoenzymes is ?

    apoenzyme+coenzyme

  • 62

    Belong to lyases:

    fumarate hydrotase

  • 63

    Which of the following enzymes is not a protein?

    ribozyme