KROK (Medicine) questions: Biology — page 3

183 questions in Biology. Open a question to see the answer options and a hint.

101. In one of Polessia regions there was an outbreak of helminthiasis manifested by cramps and facial edemas. The developed preventive measures in particular included ban… KROK 1 2016 – Question 128
102. A 2-year-old boy is diagnosed with Down syndrome. What chromosomal changes can cause this disease? KROK 1 2016 – Question 141
103. A patient consulted a physician about chest pain, cough, fever. Roentgenography of lungs revealed eosinophilic infiltrates that were found to contain larvae. What kind… KROK 1 2016 – Question 154
104. A person with the fourth blood group (genotype IAIB) has in erythrocytes both antigen A controlled by allele IA and antigen B controlled by allele IB. This phenomenon… KROK 1 2016 – Question 189
105. A shepherd, who tended to the flock of sheep with his dogs, gradually developed pain in the chest and bloody expectorations. X-ray revealed spheric helminth larvae in… KROK 1 2017 – Question 22
106. Exposure to colchicine resulted in metaphase plate of a human containing 23 chromosomes more than it is normal. Name this mutation: KROK 1 2017 – Question 33
107. A woman with the III (B), Rh (-) blood group gave birth to a child with the II (A) blood group. The child is diagnosed with hemolytic disease of newborn caused by… KROK 1 2017 – Question 85
108. A married couple came for a genetic counseling. The husband suffers from insulin-independent diabetes mellitus, while the wife is healthy. What is the probability of… KROK 1 2017 – Question 97
109. A 45-year-old woman gave birth to a boy with cleft maxilla (cleft lip and palate). On additional examination there are significant disturbances of the boy’s nervous… KROK 1 2017 – Question 105
110. Clinical presentations of a woman allowed provisionally diagnosing her with X polysomy. Cytogenetic method is applied to clarify the diagnosis. The diagnosis will be… KROK 1 2017 – Question 113
111. During dehelmintization there was a 3,5-meter-long tapeworm produced from the patient’s intestine. There are 4 suckers and hooks on the tapeworm’s scolex. Mature… KROK 1 2017 – Question 114
112. Cystinuria manifests itself in a human as cystine stones in the kidneys (homozygous individuals) or increased cystine content in the urine (heterozygous individuals)… KROK 1 2017 – Question 137
113. In one of Polessye regions there was an outbreak of helminthiasis manifested by cramps and facial edemas. The developed preventive measures in particular included ban… KROK 1 2017 – Question 141
114. Students study the stages of gametogenesis. They analyze a cell with haploid number of chromosomes, with each chromosome consisting of two chromatids. The chromosomes… KROK 1 2017 – Question 159
115. In the South and Central America there can be found a species of trypanosomes that is the causative agent of Chagas disease. What animal is the infection carrier… KROK 1 2017 – Question 163
116. Deaf parents with genotypes DDee and ddEE gave birth to a child with normal hearing. Specify the interaction of D and E genes: KROK 1 2017 – Question 174
117. A young family came for a genetic counseling to identify the father of their child. The husband insists that the child does not resemble him at all and cannot possibly… KROK 1 2017 – Question 188
118. A patient presents with indigestion, stomachaches, and excessive salivation. Similar symptoms had already been observed in this patient previously. Laboratory analysis… KROK 1 2018 – Question 37
119. A 40-year-old pregnant woman underwent amniocentesis. Examination determined the fetal karyotype to be 47, XY+21. What fetal pathology was detected? KROK 1 2018 – Question 42
120. A 20-year-old young man with tall stature, asthenic body type, signs of hypogonadism and gynecomastia, and low sperm count (azoospermia) has karyotype 47, XXY. What… KROK 1 2018 – Question 47
121. Representatives of a certain human population can be characterized by elongated body, height variability, decreased volume of muscle mass, increased length of limbs… KROK 1 2018 – Question 60
122. General structure of eukaryotic genes is as follows: exon-intron-exon. Such functional structure of a gene leads to certain specifics of the transcription process. What… KROK 1 2018 – Question 80
123. A mutation has occurred in a cell in the first exon of the structural gene. The number of nucleotide pairs changed from 290 to 250. Name this type of mutation: KROK 1 2018 – Question 87
124. A patient has an open facial wound with undermined edges; tissue necrosis with gradually developing partial gangrene that nearly reaches the bone tissue is observed. On… KROK 1 2018 – Question 128
125. Genealogical analysis of a child with myotonic dystrophy determined that this disease is present in every generation, equally presented by the relatives of both… KROK 1 2018 – Question 136
126. A young woman, a foreign student from Tehran, has made an appointment with the urologist. She complains of the sensation of heaviness in her lower abdomen and a small… KROK 1 2018 – Question 138
127. Sanitary assessment of a pond, where the children from a recreation summer camp take their swims, detected there oval cysts 50-60 micron in diameter, with 2 nuclei… KROK 1 2018 – Question 148
128. Genetic recombination is achieved via several mechanisms. One such mechanism is crossing-over. It occurs at the following stage of prophase in the first meiotic division: KROK 1 2018 – Question 171
129. A person with the fourth blood group (genotype IAIB) has in erythrocytes both antigen A controlled by allele IA and antigen B controlled by allele IB. This phenomenon… KROK 1 2018 – Question 180
130. The parents with normal hearing have two daughters and a son, who are congenitally deaf. Their other 5 children are healthy. What is the pattern of deafness inheritance… KROK 1 2019 – Question 42
131. Human genetic apparatus consists of approximately 30 thousand of genes, while the number of antibody variants can be as high as millions. What mechanism leads to… KROK 1 2019 – Question 54
132. Ingestion of plants and mushrooms that grow along highways is dangerous due to risk of lead poisoning. What is the main source of environmental pollution with this… KROK 1 2019 – Question 57
133. A young woman, a foreign student from Tehran, has made an appointment with the urologist. She complains of the sensation of heaviness in her lower abdomen and a small… KROK 1 2019 – Question 59
134. The mother’s karyotype has 45 chromosomes. It was determined that translocation of chromosome 21 to chromosome 14 had occurred. What disorder is likely to be observed… KROK 1 2019 – Question 67
135. During regular examination of schoolchildren, a scrape from the perianal folds of a 10-year-old girl shows asymmetrical oval eggs with larvae inside. What diagnosis can… KROK 1 2019 – Question 69
136. A married couple came for a genetic counseling. The husband suffers from insulin-independent diabetes mellitus, while the wife is healthy. What is the probability of… KROK 1 2019 – Question 83
137. Cells of a person working in the Chornobyl Exclusion Zone have undergone a mutation in DNA molecule. However, with time the damaged interval of DNA molecule restored… KROK 1 2019 – Question 118
138. Dwellers of a village located in the taiga make a living by harvesting berries. Lately the occurrence of alveococcosis in the village population has increased. What is… KROK 1 2019 – Question 142
139. An 18-year-old girl comes to her physician with concern about her health because she has not achieved menarche. She denies any significant weight loss, changes in mood… KROK 1 2019 – Question 152
140. After dehelmintization, a 35-year-old man passed a 3.5 m tapeworm during a bowel movement. A stool examination reveals scolex with four suckers and hooks. Mature… KROK 1 2019 – Question 156
141. Biological studies proved that the intensity of testosterone secretion and spermatogenesis varies in men throughout each 24 hours. These biorhythms are called: KROK 1 2020 – Question 6
142. Histology of the liver detected there a vesicle with chitin and protein membrane, filled with a colorless transparent fluid. What disease can manifest this way? KROK 1 2020 – Question 28
143. A young woman, a foreign student from Tehran, has made an appointment with the urologist. She complains of the sensation of heaviness in her lower abdomen and a small… KROK 1 2020 – Question 33
144. Protein synthesis occurs in several stages. During one of them, messenger RNA is being synthesized on one of the strands of a DNA segment. Name this process: KROK 1 2020 – Question 63
145. A patient diagnosed with liver abscess was hospitalized into the surgery department. He has a history of frequent gastrointestinal disturbances. Laboratory analysis of… KROK 1 2020 – Question 73
146. A woman gave birth to twins. One of them was provisionally diagnosed with Cri-du-chat syndrome that manifests as underdeveloped laryngeal muscles and ’’meowing” voice… KROK 1 2020 – Question 99
147. Genealogical analysis of a child with myotonic dystrophy determined that this disease manifests in every generation, is in equal measure present in the relatives of… KROK 1 2020 – Question 106
148. A patient with inherited immunodeficiency underwent gene therapy: the gene of an enzyme was introduced into the patient’s cells using a retrovirus. What characteristic… KROK 1 2020 – Question 136
149. The parents with normal hearing have two daughters and a son, who are congenitally deaf. Their other 5 children are healthy. What is the pattern of deafness inheritance… KROK 1 2023 – Question 3
150. At a medical genetic consultancy, the karyotype of a child with physical development problems was examined. Trisomy 13 was detected. What syndrome is it? KROK 1 2023 – Question 48

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