問題一覧
1
Which coenzyme contains a disulfide group?
glutathione
2
What is the unit of enzyme activity in the International System of Units?
katal
3
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
4
Lipase, α-amylase and trypsin belong to the class of:
hydrolases
5
Which enzyme belongs to oxidoreductases class?
succinate dehydrogenase
6
387.Activity of which isoenzyme of lactate dehydrogenase increases in blood in myocardial infarction (I) and Botkin's disease (II)?
LDH-1 LDH-5
7
Activity of which enzyme increases in blood in acute pancreatitis?
lipase
8
401.Define accordingly enzyme, coenzyme and inhibitor for the following reaction:
pyruvate carboxylase- carboxybiotin- ADP
9
Select the correct arrangement of pH optimum for the following enzymes: pepsin (I), α-amylase (II), ximotripsin (III).
I < II < III
10
Which enzyme is used in the diagnosis of liver diseases?
alkaline phosphatase
11
Which curve reflects the dependence of rate of enzymatic reaction from pH?
1
12
Which enzyme drug stops the development of RNA-containing viruses?
ribonuclease
13
The curve reflects dependence of the rate of enzymatic reaction from:
concentration of substrate with the presence of allosteric enzymes
14
Active site of complex enzymes consists of:
functionally active amino acids
15
For which organ does the LDH1 have a diagnostic value?
heart muscle
16
Determine the enzyme, that which catalyzes the reaction (NH2)2CO+H2O2NH3 + CO2 and its specificity:
urease, the absolute
17
Reduced concentration of which substances increases the speed of reaction with participation of proteases?
amino acids
18
Select coenzymes which have vitamin nature:
ubiquinone, TPP, NAD+, carnitine
19
What does the non-competitive inhibitor bind to?
enzyme substrate complex
20
Which one is not the coenzyme of transferases?
FMN
21
How is enzyme different from inorganic catalyst?
It is highly specific
22
Indicate the class which acetylcholinesterase (I) and its inhibitor (II) belong to.
hydrolase proserin
23
The other name of synthases is:
lyases
24
What is the basis for the classification of enzymes?
type of catalyzing reaction
25
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
26
what does not determine the rate of enzymatic reaction?
the molecular mass of enzyme
27
Reason of enzymes inactivation at the temperature more than 50°C is:
denaruration
28
Enzymes are classified into ?
6
29
Which site of enzyme provides conversion of substrate?
catalytic site
30
407. Which effects can activate (I) and inhibit (II) enzyme? 1. Binding of heavy metal2. Joining a phosphoric acid residue 3. Joining effector4. Accession cyanide 5. Education multienzyme complex
2,3,5 1,4
31
How are called enzymes, catalyzing the same reactions, but having different physicochemical properties?
isoenzymes
32
What does pH in the enzyme molecule act on?
ionization degree of functional groups
33
385.Determine the compliance for moniiodacetamid (I) inhibitor type and functional group (II) related with it.
irreversible sulfhydryl
34
370.Determine the enzyme (I), which catalyzes the following reaction: Carbamide + H2O→ 2 NH3 + CO2; and its specificity (II):
urease absolute
35
Which of the following belong to the iron and sulfur-containing flavoproteins?
xanthine oxidase, aldehyde oxidase, succinate dehydrogenase
36
Which amino acid in the enzyme molecule binds with diisopropyl fluorophosphate (DFP) as inhibitor?
serine
37
Which of the following enzymes catalyzes the following reaction: R – R1 + H2OD R – H + R1OH.
hydrolase
38
405.Find the correspondence. A class of enzymes Vitamins-Coenzymes I. Oxidoreductases a. PALF, CH3-B12 II. Transferase b. TPF, HS-CoA III. Isomerase c. carboxybiotin, N5, N10-CH = THFT IV. Lyase d. PALF, DOAK V. Ligases e. NAD, FAD
e a d b c
39
Which of the following enzymes is not a protein?
ribozyme
40
Which class does the enzyme, which catalyzes the following reaction, belong to? CH3COOH+HS-CоА + ATP→CH3CO-CоА + АMP + H4P207
lygases
41
Which enzyme class does catalase belong to?
oxidoreductases
42
Belong to lyases:
fumarate hydrotase
43
Which class of enzymes catalyzes the decomposition reaction without the presence of water?
lyases
44
Which of the following classes of enzymes catalyzes intramolecular changes?
isomerases
45
Which curve reflects the dependence of the rate of enzymatic reaction from the substrate concentration?
3
46
what determines the catalytic activity and the specificity of enzyme .
active site
47
Substrates of proteases are:
proteins
48
Determine the enzyme with the relative specificity.
hexokinase
49
How are called enzymes which have ion metals as the regular part of active site?
true metalloenzymes
50
402.Determine the correspondence between enzymes that have importance in clinical diagnostics and following diseases: I. Acid phosphatase 1) myocardial infarction II. α-Amylase 2) acute pancreatitis III. γ-glutamyltransferase 3) prostate cancer IV. Creatine kinase 4) liver disease
3 2 4 1
51
What is not observed under physiological conditions?
retro inhibition
52
Which of the following is not coenzyme?
pyridoxine
53
406. Find the correspondence between processes and enzymes, used in the treatment. I. Thrombosisa. pepsin II. Regeneration of tissue b. ribonuclease III. Treatment of purulent wounds c. urokinase IV. Diseases of the stomach d. hyaluronidase
c d b a
54
Holoenzymes is ?
apoenzyme+coenzyme
55
366. which of the following functional groups of enzyme molecule participate in catalytic process? 1)SH-group 2)imidazole group of histidine molecule 3)hydroxyl group of serine and threonine 4)COOH group of glutamic and aspartic acid
all
56
Which factors determine the speed of the enzyme reaction?
substrate concentration
57
Which value of pH activity of pepsin is maximum?
1,5-2,5
58
The curve reflects the dependence of the rate of enzymatic reaction from:
quantity of enzyme
59
Which of the following classes of enzymes promotes the intramolecular bond cleavage with the participation of water?
hydrolases
60
Non-protein part of complex enzymes is called ?
coenzyme
61
Which class does the enzyme, which catalyzes the following reaction, belong to? Glutamic acid + H2O + NAD+ → α-KGA + NH3+ NADH2
oxidoreductase
62
Inhibitor of which enzyme in blood is contrical?
trypsin
63
Which group of catalytic site of enzyme is the action of mercury ions associated with as inhibitors?
thiol group of cysteine