Which of the following is true of chromatin? Explanation: Chromatin is not present in all eukaryotic and prokaryotic DNA; most prokaryotic DNA is circular and does not require the complex folding of eukaryotic chromatin. Chromatin exists in more compacted states than 10nm.
Which of the following is a description of 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 are characteristics of chromatin?
Chromatin is composed of DNA and histones that are packaged into thin, stringy fibers. These chromatin fibers are not condensed but can exist in either a compact form (heterochromatin) or less compact form (euchromatin). Processes including DNA replication, transcription, and recombination occur in euchromatin.
Which of the following is not true for chromatin?
Which of the following is not true for chromatin? Explanation: Organized structure of DNA and protein is incorrect as chromatin is less condensed and extended DNA while highly condensed DNA is of chromosomes.
What is chromatin quizlet?
Chromatin. An organelle which forms chromosomes during cell division. Consists of DNA, RNA, and proteins. This organelle can have different structures (e.g.an “x” or lines spinning). This organelle is only found in a eukaryote cell.
What is an example of a chromatin?
For example, spermatozoa and avian red blood cells have more tightly packed chromatin than most eukaryotic cells, and trypanosomatid protozoa do not condense their chromatin into visible chromosomes at all. … The local structure of chromatin during interphase depends on the specific genes present in the DNA.
What is chromatin name two components of chromatin?
The two main components of chromatin are DNA and histones.
What is a chromatin state?
In the more general sense, the “chromatin state” of a genomic region can refer to the set of chromatin-associated proteins and histone modifications in that region. These are most often assayed by ChIP-seq, but also ATAC-seq, DNase-seq, ChIP-exo, and other methods.
Which is the primary constituent of chromatin?
The primary protein components of chromatin are histones that help to organize DNA into “bead-like” structures called nucleosomes by providing a base on which the DNA can be wrapped around. A nucleosome consists of 147 base pairs of DNA that is wrapped around a set of 8 histones called an octomer.
Which of the following is present prokaryotic chromatin?
Prokaryotic cells do not have chromatin, instead, they have genophore, which is the prokaryotic equivalent.
What is true about nucleolus Mcq?
Nucleoli are made up of DNA, RNA and protein. It is not a membrane-bound structure. It is the site of ribosomal RNA synthesis. Therefore, they are actively involved in protein synthesis.
Which region of chromatin is transcriptionally silent?
The two types of chromatin, heterochromatin and euchromatin, are functionally and structurally distinct regions of the genome. Heterochromatin is densely packed and inaccessible to transcription factors so it is rendered transcriptionally silent (Richards and Elgin 2002).
Which statement is true for eukaryotic cell?
Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell’s DNA and directs the synthesis of proteins and ribosomes.
What is chromatin made of quizlet?
Chromatin is made up of DNA tightly bound to proteins called histones.
What happens Interphase quizlet?
What happens during Interphase? The cell grows, replicates its DNA, and prepares to begin mitosis. … The spindle fibers SPLIT APART the sister chromatids and move them to opposite ends of the cell, equally dividing the genetic material.
Where is the nucleolus found quizlet?
It is the small, round structure in the nucleus, where ribosomes are made.