A cell laboratory animal have subjected to an exuberant X-ray irradiating. In outcome roteinaceous fragments in cytoplasm were formed. What organelles of a cell will take part in their salvaging?

Lysosomes

Ribosomes

Endoplasmic reticulum

Cell center

Ribosomes

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To hospital converted the man with genetical set of Kartenger’s symptoms, in which locomotion of cilia and flagella absent. What are molecular mechanisms of this pathology?

Lack of dynein

An excess of dynein

Lack of tubulin

A deficit of spectrins

A deficit of hyaluronidase

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Moving of the daughter chromatids to the poles of the cell is observed in the mitotically dividing cell. On what stage of the mitotic cycle is this cell?

Anaphase

Interphase

Metaphase

Prophase

Telophase

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The cell of the laboratory animal was overdosed with Roentgen rays. As a result, albuminous fragments formed in the cytoplasm. What cell organelles will take part at their utilization?

Lysosomes

Cells center

Ribosome

Endoplasmic reticulum

Golgi complex

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As a result of blocking separate ingredients of a genome, a cell gain characteristic for them morphological, biochemical and function singularities. What title has this process?

Differentiation

Capacitation

Reception

Adhesion

Determination

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During the postsynthetic period of mitotic cycle the synthesis of proteins – tubulines, which take part in the mitosis formation, was destroyed. It can cause the impairment of:

Duration of mitosis

Chromosome spiralization

Chromosome despiralization

Chromosome condensation

Cytokinesis

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The study of mitotic cycle phases of onion root revealed the cell, in which the chromosomes are situated in the equatorial plate, forming a star. What stage of the cell mitosis is it?

Metaphase

Interphase

Prophase

Anaphase

Telophase

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Which of the following components of the mitochondria would be most abundant in those cells that have high ATP production?

Cristae

Inner membrane space

Matrix

Outer mitochondrial membrane

Dense granules

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Which of the following events occurs during anaphase of mitosis?

Chromatids separate

Chromosomes coil

Nuclear envelope reforms

Chromosomes uncoil

Nuclear envelope begins to break down

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After examining a tissue from a biopsy specimen, a pathologist notes that a large percentage of the cells have nuclei with abundant nucleoli. Which of the following cellular events would be elevated in these cells?

rRNA production

Mitosis

mRNA production

Production of secreted proteins

Exocytosis

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Cells that are actively involved in the phagocytosis of extracellular material would contain high levels of which of the following cellular organelles?

Lysosomes

Rough endoplasmic reticulum

Golgi apparatus

Smooth endoplasmic reticulum

Ribosomes

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A small tumor was excised from the adrenal gland of an adult male. After examination, the cells of the tumor were shown to express excessively high levels of lipid and steroid hormones. Which of the following organelles were abundant within these tumor cells?

Smooth endoplasmic reticulum

Rough endoplasmic reticulum

Ribosomes

Lysosomes

Peroxisomes

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A tumor was removed from the liver of a patient, and cell cultures of tumor cells were established. Before chromosomal analysis of these cells, colchicines was added to a culture. This alkaloid prevents the polymerization of microtubules. These cancerous cells would be arrested at which of the following stages of mitosis?

Metaphase

Anaphase

Interphase

Telophase

Prophase

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A pathologist is studying a tissue section of the cerebrum by light microscopy. He notes a structure within a neuron that has both a granular and a fibrous component. Which of the following is this pathologist examining?

Nucleolus

Ribosome

Golgi apparatus

Rough endoplasmic reticulum

Mitochondria

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A pathologist is studying a tissue section of the cerebrum by light microscopy. He notes a structure within a neuron that has both a granular and a fibrous component. What is the main function of the cellular component?

rRNA production

ATP production

Protein trafficking

Protein packaging

Site of protein synthesis

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A fresh biopsy specimen appears to be undergoing atrophy. The nuclei of cells of this tissue are isolated by fractionation and homogenized. The resultant nuclear material is separated in an agarose gel and stained with ethidium bromide, which binds tymidin residues of DNA. Examining the gel under ultraviolet light, the researcher notes that the DNA is separated in increments of 200 base pairs by comparing it with the DNA standards. Which of the following accounts for this observation?

Nucleosomes

Chromosomes

Heterochromatin

Nucleoli

Euchromatin

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