Which histone helps stabilize the solenoid structure of eukaryotic chromatin?   H4 H3 H2B H2A H1

Q: Malaria, one of the most pervasive and destructive of all infectious diseases, is caused by…

A: Gene regulation includes chemical and structural changes in genetic material, or mechanism which…

Q: What are the components of a single nucleosome?a. About 146 bp of DNA and four core histone…

A: Introduction: DNA packaging refers to the folding of the DNA of an organism into a structure that is…

Q: Which would freely diffuse through the nuclear pore complex?     GTP     a chromosome…

A: Nuclear pore is a protein complex that covers the entire nucleus in its nuclear envelope.

Q: When chromatin is in the form of a 30 nm fibril, how many copies of H1 and H2A histone proteins…

A: The DNA is wrapped around the nucleosome within the cell to form chromatin. Nucleosome – it is a…

Q: Which type of chromatin makes dark bands? Does this type usually contain more or less active genes?…

A: The human genome contains more than 3 billion nucleotides(organic molecules consist of nucleoside…

Q: Cell (A) contains 3.1 billion (3.1 x 109) base pairs of DNA. Each nucleosome has about 200 bp of DNA…

A: The eukaryotic DNA or chromatin is organised in a special structure that is known as nucleosome.…

Q: How does histone acetylation alter chromatin structure? (300 word limit)

A: Histones known as a protein which provides chromosomes with structural support. These are usually…

Q: The term heterochromatin refers to heavily condensed regions of chromosomes that are largely devoid…

A: The cell cycle is the sequence of events that occurs in cell results in the division of cytoplasm,…

Q: What is the diameter of a nucleosome?

A: A nucleosome is the basic formational unit of the DNA packaging in eukaryotic cells.  The structure…

Q: Which of the following DNA types forms the nucleolar organizer (nucleolus)?     centromeric…

A: 1. Centromeric heterochromatin: it is the part of the chromatin that is transcriptionally inactive…

Q: Describe what structural changes convert a chromosomal region that is 300 nm in diameter to one that…

A: Chromosomes are thread-like structures that are located in the nucleus. It is composed of protein…

Q: What are the components of a single nucleosome?a. About 146 bp of DNA and four histone proteinsb.…

A: Nucleus in a eukaryotic cell consists of well packed DNA in a condensed form of chromatin fibers.…

Q: One change observed at the centrosomes early in mitosis is an increase in the number of…

A: polar orientation of microtubules. associate with other proteins to form gamma tubulin ring complex…

Q: Changes in chromatin packing correlate with changes in gene expression in most cells.  Why do you…

A: The chromosomes resemble a mass of extremely fine tangled string called chromatin, consisting of DNA…

Q: All of the following statements regarding nucleosomes are true EXCEPT A each bead-like structure…

A: The length of DNA is about 5 feets. This 5 feets long DNA needs to be placed in nucleus of every…

Q: How does RNA machinery maintain pericentric heterochromatin around the centromeres of eukaryotic…

A: Heterochromatin is densely packed and inaccessible to transcription factors. Therefore…

Q: How many number of histone proteins present in a nucleosome? 4 6 9.

A: The nucleosome is the basic structural unit of DNA packaging in eukaryotes and represents a segment…

Q: Kree DNA has histone like proteins that wrap up in nucleosomes. The Kree have a core DNA length of…

A: Nucleosomes are the basic repeating unit of 'beads on a string' structure of eukaryotic chromosome.…

Q: scribe how the acetylation of core histones may loosen chromatin packing.

A: DNA is the genetic material is usually found in all prokaryotic and eukaryotic cells. DNA is made up…

Q: Draw and describe the “beads on a string” structure of the chromatin. 4. What are the proteins found…

A: The haploid human genome contains approximately three billion base pairs of DNA. Each base pair is…

Q: Small molecules binding to histone proteins also control gene expression by  chromatin remodelling…

A: Genes or DNA are generally coiled and held together by the help of structural proteins called…

Q: In a typical eukaryotic cell, would you expect to find more molecules of the H1 histone or more…

A: Histones are basic proteins that are associated with the DNA present in the nucleus and help in…

Q: Which of the following statements about histones is true?a. They are proteins whose sequence is…

A: The chromosomes are duplicated during the process of cell division. The process of  cell division…

Q: Describe the basic structure of a nucleosome. What is the role of histone H1?

A: DNA is the double-stranded molecule that is the genetic material in most animals except for some…

Q: Which structure in the eukaryotic chromosome is about 11 nm in diameter, contains 8 histone proteins…

A: In eukaryotes, all of the cell's chromosomes are stored inside a structure called the nucleus. Each…

Q: Which histone is not a necessary component in the formation of nucleosornes?

A: In eukaryotes, the DNA is packed in a compact form in which a DNA segment is wound around 8 histone…

Q: How does histone acetylation change chromatin structure? Group of answer choices 1. Histones lose…

A: Chromosomes are the condensed form of the chromatins. It contains DNA that contains histone proteins…

Q: How many copies of the H2B histone would be found in chromatin containing 50 nucleosomes? a. 5 b. 10…

A: The defined length of DNA is attached to a collection of histones called octamer. The total unit is…

Q: Which of the following is a type of chromatin remodeling? the changing of amino acid sequence of…

A: The DNA double helix is firmly wrapped around nuclear proteins called histones in the cell nucleus.…

Q: Would you expect to find active genes in regions of heterochromatin or euchromatin

A: DNA is the genetic material of all organisms except some viruses. The DNA  are double stranded…

Q: What are euchromatin with rexamples?

A: Chromatin is the complex formed by the condensation of DNA and histone proteins. It is involved in…

Q: Consider the figure beow, which depicts chromatin within the neucleus of a eukaryotic cell. nucleus…

A: Topologically associating domain (TAD) also called chromosomal interacting domains in bacteria. They…

Q: Name the 5 types of histones, Which form the nucleosome core and which histone holds the nucleosome…

A: Histones are protein biomolecules that are responsible for stabilizing and condensing the DNA of…

Q: Is a centromere a protein and tell What happens if a centromere does not break?

A: Centromere is a central chromosome structure that attaches sister chromatids during cell division.…

Q: There are five major types of histones in eukaryotic cells. One of these is not part of the…

A: The nucleosome is the fundamental subunit of chromatin. The nucleosome is composed of two turns of…

Q: Loosening the chromatin structure occurs because of Select one: a. Lysine methylation b. Lysine…

A: Euchromatin: Euchromatin is a type of chromatin (DNA, RNA, and protein) that is densely packed with…

Q: Many proteins other than histones are found associated with chromosomes. What roles do these…

A: Histones are a family of basic proteins, which associate with deoxyribonucleic acid (DNA) in the…

Q: The nucleosomal core in eukaryotes consists of all of the following histone proteins except:…

A: NUCLEOSOMES  It is a section of DNA that is wrapped around a core of proteins termed as Histone…

Q: Which of the following make up a core nucleosome structure?   A)  about 147 bp of DNA D)  A tetramer…

A: INTRODUCTION- Chromosome is made up of histone proteins. These proteins interact with the long DNA…

Q: What structure of the nucleus has the function of transporting small molecules through the nuclear…

A: The nucleus is an important membrane-bound organelle in a eukaryotic cell that houses the genetic…

Q: class of non-protein coding RNA molecules that are important in chromatin opening

A: It's always necessary to regulate the genome structure and also the gene expression process. This…

Q: Which of the following is the most compact level of chromatin structure? Metaphase chromosomes…

A: Metaphase chromosomes is the most compact level of chromatin structure.

Q: Which of the following represents the order of increasingly higher levels of organization of…

A: Histones octamer play a key role in the packaging of DNA. DNA wraps the core histones and forms the…

Q: Histones form more accessible chromatin because of Select one: a. Reduced electrostatic attraction…

A: Eukaryotic DNA remain associated with histone proteins and from nucleosome model. It is the…

Q: Which of the following statements concerning eukaryotic chromatin is true.     Histones have an…

A: Eukaryotic chromatin is made up of protein and DNA . It consists of beads referred to as nucleosome.…

Q: The nucleosome core particle: a) contains about 145 based of DNA b) contains 6 histone proteins…

A: DNA (deoxyribonucleic acid) was discovered by Friedrich Miescher. Nucleotides are the structural…

Q: How are nucleosomes arranged in condensed 30-nm fibers?

A: The main aim of coiling and various kind of measures undertaken, making a complex structure of DNA…

Q: Since eukaryotic chromosomes are assembled with histone proteins, how are replication and…

A: Eukaryotes are the organisms that contain a nuclear membrane covering the nucleus. But the…

Q: how does histone acetlation affect chromatin structure and gene expression

A: Genes are a type of hereditary unit that directs protein synthesis in living organisms. Through…

Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase. 

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons: