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Injection of the drug dicoumarol causes a sharp decrease in blood of blood clotting factors. Dicoumarol is an antivitamin of:

A patient presents with hyperkeratosis,

disturbed twilight vision, and frequent

infectious processes of the skin and

mucosa. What preparation needs to be

administered in this case?

An analytical chemist performs a

qualitative   analysis   of   cations   that

belong to  the  6th  analytical group.

If   nickel   ions   are   processed   with

Chugaiev's reagent (dimethylglyoxime),

a colored substance is produced. What

is the color of the resulting substance?

The following microorganisms have

been detected in the hand lavage of a

kindergarten cook: colibacilli, ray fungi,

staphylococci, bacilli, mold fungi. What

microbes indicate a fecal contamination

of the hands?

Permanganametometry      is      a

titrimetric method for determination

of substances. It is based on oxidation

reactions involving permanganate ions.

Which of the following are the standard

solutions that are used in this method

for    quantitative    determination    of

oxidants by reverse titration?

During   hemoglobin   catabolism,

iron is  released.  Then it enters the

bone marrow and is again used for

the synthesis of hemoglobin.Which of

the following proteins helps in iron

transport?

In the process of systematic analysis

it   is   necessary   to   separate   PbSO^

from  the  mixture  of cation  sulfates

belonging to the 3rd analytical group.

What approach will be optimal for this

purpose?

X-ray examination of a 59-year-

old patient detected a distinct shadow,

differential for tumor, in the lower lobe

of the right lung. It was pre-determined

that the tumor is benign. Which of

the following features characterizes the

tumor as benign?

Each root zone performs a certain

function due to the special cells that

form tissues. The root zones allow the

plants to grow in the soil, absorbing

substances from it and carrying them

to all the other plant parts. What type

of vascular bundles is characteristic of

all root zones of single-seed plants?

    A study of the microbiological purity

of  tablet   formulations  is   conducted

at the production site. Cultivation of

the   samples   on  mannitol  salt  agar

resulted in the growth of golden-yellow colonies. Microscopic examination of the colonies determined the presence of spherical gram-positive bacteria, arranged in clusters; the microorganisms had the ability to coagulate the plasma. The pure culture of which of the following bacteria was detected in the samples?

The study object is an undeveloped

or  embryonic shoot which  normally

occurs at the tip of a stem or in the

axil of a leaf. It has growing point and

germinal leaves. Which of the following

is described?

The   fruit   is   a  bright-red  juicy

follicetum with a sweet-sour taste. The seeds are kidney-shaped   and   smell

similar to lemon. Such fruits belong to:

After   examination,   a   newborn

was diagnosed with congenital rubella

syndrome. Name the route of disease

transmission in this case:

A patient is  suspected to  have

typhoid fever. A sample of blood serum

was obtained for analysis and a reaction

with    salmonella   diagnosticum   was

performed. What type of serological

reaction is it?

Colamine HO - CH₂ - CH₂ - NH₂

belongs   to   the   following   group   of

heterofunctional compounds:

A 50-year-old patient in a poor

condition was delivered to the hospital.

Objectively, the skin and visible mucosa

are cyanotic, arterial blood saturation

- 88%, NIBP- 90/60 mm Hg, pulse is

117 per minute, respiratory rate is 22

per minute. The patient has a history

of chronic heart failure. Which of the

following types of hypoxia is most likely

to develop in this case?

A  student  studies  the  digestive

system   of   vertebrates.   This   organ

is   primarily   located   in   the   right

upper   quadrant   of   the   abdomen.

It    detoxifies    different    metabolites,

produces    hormones    and    digestive

biochemicals,      regulates      glycogen

storage,    synthesizes    proteins,    and

decomposes red blood cells. Which of

the following organs is being studied by

the student?

A  28-year-old male  patient was

brought to the toxicology department.

He developed decreased vision, poor

coordination,     decreased     level     of

consciousness, vomiting and abdominal

pain. This signs appeared after drinking

alcohol   substitutes.   Which   of   the

following   should   be   used   as    an

antidote?

After  a  car  accident  a  patient

presents   with   complete   absence   of

voluntary movements of the upper and

lower limbs. Name this disorder of the

nervous system:

Acetic    acid    concentration    in

a   solution   being   analyzed   can   be

determined by means of potentiometric

titration.      Specify      the      indicator

electrode:

There   are   certain   patterns   of

chemical    and    biological    processes

occurring with the medicine in the body.

Reduced , absorption   of   tetracycline,

when    it    is    co-administered    with

antacids, is an example of: