KROK 1 2011 – Question 152 · KROK (Medicine) · Histology, Cytology, and Embryology
On an electron micrograph a scientist has identified a structure formed by eight histone proteins and a part of DNA molecule which makes about 1,75 revolutions around the molecules. Which structure has been identified?
- A. Elementary fibril
- B. Half-chromatid
- C. Nucleosoma
- D. Chromosome
- E. Chromatid
Hint
Place the described histone-DNA complex in the hierarchy of DNA packing and ask whether it is the first, an intermediate or the final level.
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.
More questions on Histology, Cytology, and Embryology
- Electronic microphotography of pulmonary alveole’s wall presents a big cell. Its cytoplasm has a lot of mitochondria, developed Golgi apparatus…
- In course of a conditional experiment the development of mesenchyma cells was completely inhibited. Development of the following muscular tissue…
- A histologic specimen shows an organ’s parenchyma which is presented by lymphoid tissue making some lymph nodes. The nodes are located diffusively…
- Ultramicroscopical examination of "dark"hepatocyte population in the cell cytoplasm detected a developed granular endoplasmic reticulum. What…
- During postembryonal haemopoiesis in the red bone marrow the cells of one of the cellular differons demonstrate a gradual decrease in cytoplasmic…
- A microspecimen of heart shows rectangular cells from 50 to 120 mcm large with central position of nucleus, developed myofibrils. The cells are…