karyosome in American English (ˈkæriəˌsoum) noun Biology. 1. Also called: chromocenter. any of several masses of chromatin in the reticulum of a cell nucleus.

Is karyosome same as nucleolus?

Karyosome refers to the chromatin material inside the cell nucleus when the cell is not undergoing meiotic division. It appears to be a dense mass in the middle of the cell and is often mistaken for the nucleolus. ... It seems to form at the diplotene stage, or in the first meiotic prophase.

What do you mean by Karyosome?

: a mass of chromatin in a cell nucleus that resembles a nucleolus.

What does Karyolymph mean?

/ (ˈkærɪəʊˌlɪmf) / noun. the liquid portion of the nucleus of a cell.

What is the other name of Karyolymph?

Karyolymph. The presumably fluid substance or gel of the nucleus in which stainable elements were believed to be suspended; much that was formerly considered to be karyolymph is now known to be euchromatin. Synonym: nuclear hyaloplasm, nuclear sap, nucleochylema, nucleochyme.

Chromosomes and Karyotypes

39 related questions found

What is Euchromatic nucleus?

Euchromatin is a lightly packed form of chromatin (DNA, RNA, and protein) that is enriched in genes, and is often (but not always) under active transcription. Euchromatin comprises the most active portion of the genome within the cell nucleus.

Where is karyosome located?

After staining with a DNA fluorescent dye (DAPI, Hoechst), karyosome appears as a spherical compact spot located in the center of the oocyte nucleus.

What is karyosome in Entamoeba histolytica?

Presence of one nucleus with evenly arranged chromatin on the nuclear membrane and a small, cen- trally located karyosome are morphological features of trophozoites. ... Presence of red blood cells within the cytoplasm of trophozoites is a diagnostic feature for the identification of E. histolytica.

What is peripheral chromatin?

In the limited space of the nucleus, chromatin is organized in a dynamic and non-random manner. ... Peripheral chromatin has both been described as silent chromatin, interacting with the nuclear lamina, and active chromatin, interacting with nuclear pore proteins.

What is a cellular nucleus?

The nucleus is a highly specialized organelle that serves as the information processing and administrative center of the cell. ... A double-layered membrane, the nuclear envelope, separates the contents of the nucleus from the cellular cytoplasm.

What does vesicular chromatin mean?

Pathologists often use the microscopic look of the chromatin to help them understand a cell's behavior. For example, 'clumpy', 'coarse', or 'vesicular' are words that are often used to describe chromatin in abnormal or even cancerous cells.

What is the another name for nucleoplasm?

Similar to the cytoplasm of a cell, the nucleus contains nucleoplasm, also known as karyoplasm, or karyolymph or nucleus sap. The nucleoplasm is a type of protoplasm, and is enveloped by the nuclear envelope (also known as the nuclear membrane). The nucleoplasm includes the chromosomes and nucleolus.

What does the nucleoplasm do?

Inside the nuclear membrane is the nucleoplasm, which main function is to store DNA and facilitate an isolated environment where controlled transcription and gene regulation is enabled.

How do nucleoplasm and cytoplasm differ?

The cytoplasm is a thick fluid that is present inside each cell and is covered by the cell membrane. Nucleoplasm is the living part of the nucleus that is surrounded by a nuclear membrane. The cell consists of several cell organelles like the endoplasmic reticulum, Golgi body, etc.

What is the vector of Entameba histolytica?

Contamination of food may occur with cysts as a result of the contact of food with the fly, which is a vector in the transmission of various cysts of protozoa, including Entamoeba histolytica and other pathogenic microorganisms (e.g. Salmonella, Shigella).

Is Entamoeba Hartmanni pathogenic?

Several species of amebae are capable of colonizing the human gastrointestinal tract but, in contrast to Entamoeba histolytica, are not considered pathogenic. The nonpathogenic intestinal amebae include several Entamoeba species (E. coli, E. hartmanni, and E.

What is the composition of amebic Chromatoidal bars?

Ans. A Ribonucleoprotein The chromatoid bars present in the cysts of Entamoeba endoplasm is made of ribonucleoprotein. 25.

What is in the chromatin?

Chromatin is a complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells. ... Under the microscope in its extended form, chromatin looks like beads on a string. The beads are called nucleosomes. Each nucleosome is composed of DNA wrapped around eight proteins called histones.

What is the importance of Encystation?

Encystation involves the differentiation of proliferative trophozoites into dormant cysts and is thus crucial for maintaining the life cycle of Entamoeba parasites. Encystation proceeds with a variety of specific, simultaneous changes; for instance, cells become surrounded by chitin walls (14).

What is trophozoite stage?

A trophozoite (G. trope, nourishment + zoon, animal) is the activated, feeding stage in the life cycle of certain protozoa such as malaria-causing Plasmodium falciparum and those of the Giardia group. (The complement of the trophozoite state is the thick-walled cyst form).

What is Euchromatic and heterochromatic?

Euchromatin is the lightly packed form of chromatin, whereas heterochromatin refers to the condensed form. Image Credit: molekuul_be / Shutterstock. Euchromatin and heterochromatin are functionally and structurally distinct, and have key roles in the transcription and expression of genes.

What region of chromosome is called euchromatin?

Euchromatin exists in decondensed form and is found in the distal arms of the chromosome. It is usually dispersed all around the nucleus and is replicated throughout the S phase. Euchromatin is the transcriptionally active form of chromatin.

What is Euchromatic region in chromosome?

The euchromatin is a constant size region and includes sequences homologous to the X chromosome, Y-specific repetitive sequences, and all the genes identified in the Y chromosome, which include the now identified 27 distinct protein-coding genes or gene families.

What is the outer name of nucleoplasm?

"Karyoplasm" is the another name of nucleoplasm.