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Вопрос 1
Choose proper definition of anabolism:
Варианты ответов
- complex molecule synthesis from simple molecules as a result of which structural elements of living organism are renewed and formed
- system of all chemical reactions in cells tissues and organs of plants and animals
- reactions of substance degradation these substances come to organism with food reactions lead to energy discharge
- chemical reactions which go on with the help of special proteins which are called enzymes
Вопрос 2
Medications acidic nature is best absorbed:
Варианты ответов
- from the stomach (pH 1-3)
- from the intestine (pH 7-8)
- from the oral cavity (pH 5-8)
- from the esophagus (pH 6-7)
Вопрос 3
To what electrode would valine move (pI=5,97) if electrophoresis goes on at pH=3,0?
Варианты ответов
- cathode
- anode
- diode
- triode
Вопрос 4
In the organism serine transforms to 2-amino-1-ethanol according to the following reaction:
Варианты ответов
- deamination
- decarboxylation
- neutralization
- transamination
Вопрос 5
Biuretic reaction is a qualitative reaction of proteins with:
Варианты ответов
- aromatic parts
- carbonyl group
- sulfur presence
- peptide bond
Вопрос 6
The oxidoreductases prolyl hydroxylase and lysyl hydroxylase are necessary for collagen synthesis – the protein of connective tissues What vitamin is there in the composition of coenzymes of these enzymes?
Варианты ответов
- vitamin В2
- vitamin В6
- vitamin РР
- vitamin С
- pantothenic acid
Вопрос 7
Choose the class to which casein belongs
Варианты ответов
- phosphoprotein
- chromoprotein
- nucleoprotein
- metalloproteine
- glycoproteins
- lipoproteins
Вопрос 8
There is a large number of arginine molecules (from 60 to 85%) in protamines. Determine the charge of protamines Determine the charge protamines:
Варианты ответов
- negative
- neutral
- positive
- bipolar
Вопрос 9
How will the rate of enzymatic reaction change if the temperature increases from 7 to 37 °С?
Варианты ответов
- it will continuously increase
- at first it will increase and then it will go down
- it will continuously decrease
- at first it will decrease and then it will go up
Вопрос 10
Pyridoxalphosphate is found in the composition of coenzymes of those enzymes which catalyze decarboxylation reactions Which vitamin active form is pyridoxalphosphate?
Варианты ответов
- vitamin В2
- vitamin В6
- vitamin РР
- vitamin С
- pantothenic acid
Вопрос 11
Uronic acids are formed:
Варианты ответов
- during monose oxidation by weak oxidizer
- during monose oxidation by strong oxidizer
- during monose enzymatic oxidation
- during monose reduction
- during monose mutarotation
Вопрос 12
In heparin in the structure of repeated di-saccharide units there are residues of D-glucosamine and two uronic acids: D-glucuronic acid and L-iduronic acid What is the class of heparin:
Варианты ответов
- homopolysaccharides
- tri-saccharides
- heteropolysaccharides
- reducing di-saccharides
- non-reducing di-saccharides
Вопрос 13
Sucrose isomer is:
Варианты ответов
- galactose
- maltose
- arabinose
- fructose
- glucose
Вопрос 14
How many macroergic bonds in the ATP molecule:
Варианты ответов
- none
- 1
- 2
- 3
- 4
Вопрос 15
Among pyrimidine base and carbohydrate in nucleosides there is a bond:
Варианты ответов
- beta -N-glycoside
- alpha-O-glycoside
- beta -O-glycoside
- alpha-N-glycoside
Вопрос 16
Protein synthesis on RNA matrix is:
Варианты ответов
- replication
- duplication
- compilation
- transcription
- reparation
- translation
Вопрос 17
Choose reagent (reagents) which has a discoloration at reactions with vegetative oils:
Варианты ответов
- bromine water
- hydrogen in the presence of a catalyst
- water solution of NaOH
Вопрос 18
Choose one main function of the minor components of tRNA (thiouracil, dihydrouracil, pseudouridine)
Варианты ответов
- they protect «their own» DNA from destruction by enzymes DNA-ases
- they prevent spiralization of certain parts at poly-nucleotide sequence of tRNA
- they increase the rate of DNA filial chain in replication
- they slow the rate of DNA filial chain in replication
Вопрос 19
Choose the name of biologically active organic substances that are produced by the endocrine glands:
Варианты ответов
- vitamins
- drugs
- enzymes
- hormones
- alkaloids
Вопрос 20
The enzyme of saliva and pancreatic juice L-amylase breaks up only L-glycoside bonds in starch and does not break up D-glycoside bonds in cellulose. This is the enzyme which exhibits:
Варианты ответов
- absolute specificity
- relative specificity
- stereochemic specificity
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