a)Discuss or explain the consequences for a cell if the chromatin could not be remodeled.  (b) Does the action of the telemorase enzyme contradict the central dogma of molecular biology? why or why not?

Q: Compare heterochromatin and euchromatin. What are the differences between them?

A: Deoxyribonucleic acid (DNA) in the eukaryotic cell nucleus present in a highly compacted fashion.…

Q: How many copies of each type of core histone would it take to wrap the entire human genome into…

A: Introduction -The haploid human genome is made up of roughly 3 billion base pairs of DNA organised…

Q: Why Heterochromatin spreads linearly?

A: Heterochromatin refers to the part of the chromosomal regions that appear dark due to the…

Q: Because DNA polymerase cannot copy the 5′ ends oflinear DNA molecules, chromosomes will shorten…

A: DNA (deoxyribonucleic acid) is defined as the self-replicating material that carries genetic…

Q: What is the difference between heterochromatin and euchromatin? What accounts for (or causes) the…

A: The chromosomes appear as a mass of greatly fine tangled string called "chromatin." Chromatin is…

Q: Define facultative heterochromatin

A: Introduction  Heterochromatin: it is highly condensed region of the chromatin which remains…

Q: We seem to know more about the structure of eukaryotic chromosomal DNA than bacterial DNA. Discuss…

A: Deoxy ribonucleic acid (DNA) is the genetic material of most organisms that carry coded genetic…

Q: If a human nucleus is 10 mm in diameter, and it must hold as much as 2 m of DNA, which is complexed…

A: A cell is a structural and functional unit of life. The structure and function of a cell have been…

Q: What is the relation between the concepts of chromatin and chromosome? Are euchromatin and…

A: Chromosomes are present in the nucleus.

Q: What role do the following cellular components play in the storage,expression, or transmission of…

A: Cell parts are the complex biomolecules and structures of which cells, and in this manner living…

Q: If a human nucleus is 10 mm in diameter, and it must hold as much as 2 m of DNA, which is complexed…

A: The nucleus is the main membrane-bound cell organelle present in the eukaryotic cell, its structure…

Q: Let’s suppose you have isolated chromatin from some bizarre eukaryote that has a DNA linker region…

A: The DNA (deoxyribonucleic acid) of non-dividing and interphase cells exists in the form of…

Q: Consult Figure 2. Would you consider this figure to be depicting euchromatin, or heterochromatin,…

A: Chromatin exists as euchromatin or heterochromatin. Euchromatin are loosely bound,less condensed,…

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: Explain the term heterochromatin ?

A: Deoxyribonucleic acid (DNA) is a double stranded polynucleotide chain. Both the strands coil around…

Q: What two properties, one structural and one functional,distinguish heterochromatin from euchromatin?

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: Besides H1, how many different kinds of proteins are part of the nucleosome?

A: DNA is the nucleic acids present in the organisms. DNA is the deoxy ribose nucleic acid in which…

Q: The analysis of individual nucleosomes reveals that each unit contained one copy of each protein and…

A: Nucleosomes are the unit of chromosome.

Q: An article entitled “Nucleosome Positioning at the Replication Fork” states: “both the ‘old’…

A: The DNA upstream of the replication fork that is nucleosome-free aids in facilitating the DNA DNA…

Q: Distinguish between heterochromatin and euchromatin.

A: Two types of chromatin (euchromatin and heterochromatin) are distinguishable during the interphase.…

Q: Research has shown that more mutations accumulate in regions of a chromosome that consist of compact…

A: Mutations are defined as an error that occurs in DNA copying during cell division which changes the…

Q: Define the heterochromatin ?

A: The chromosomes in the cell nuclei can be seen in different sizes and shapes through out the cell…

Q: Describe nucleosome supercoiling and its relationship to the radial loop–scaffold model of chromatin…

A: DNA being a large molecule, is packed with histone proteins to form a very compact structure known…

Q: a. What DNA sequences are found at the telomeresof human chromosomes?b. What functions do the two…

A: The deoxyribonucleic acid (DNA) is the hereditary material that transmits the genetic information…

Q: How many nucleosomes form the “width” of the 300 Angstrom fiber, in chromatin packaging?

A: Each chromosome consists of a single, enormously long linear DNA molecule associated with…

Q: What is the function of euchromatin?

A: The chromatin is the complex formed by the condensation of DNA and histone proteins. Chromatin…

Q: What is the purpose of heterochromatin and does heterochromatin transcribed?

A: Heterochromatin is a condensed or tightly packed form of DNA that comes in multiple varieties. These…

Q: Eukaryotic DNA is typically organized into two major regions called euchromatin and heterochromatin.…

A: Sol: Chromatin is a macro molecule which consist of DNA (deoxyribonucleic acid), RNA (ribonucleic…

Q: Describe constitutive heterochromatin and facultative heterochromatin. Based upon this information,…

A: A nucleic acid is a linear polymer of nucleotides that carries the cell's information. DNA…

Q: You are interested in studying a gene called pumper that is important for heart function. The pumper…

A: Chromatin is the region containing gene. Some genes are in open state and some genes are in closed…

Q: Some portions of the chromosomes are coiled with inactive genes as electron- dense masses of…

A: DNA(deoxyribonucleic acid) is a molecule comprised of two polypeptide chains that coil around each…

Q: What are the two types of heterochromatin?

A: A tightly packed form of DNA or condensed DNA is called heterochromatin. Its primary function is to…

Q: What is the difference between euchromatin and heterochromatin?

A: Chromatin is a complex of deoxyribonucleic acid (DNA) and protein present in eukaryotic cells. The…

Q: One of the following is a characteristic of eukaryotic genetic material? 1. Eukaryotic genetic…

A: DNA is the hereditary genetic material found in cells of living organisms. In eukaryotic cells, DNA…

Q: Explain, How does histone acetylation alter chromatin structure?

A: DNA is the genetic material present in the cell.

Q: How the process of chromatin condensation is performed?

A: As we understand, the cell DNA is never exposed and unaccompanied by different proteins. Maybe, it…

Q: What role do telomeres and telomerase play in cancer progression?

A: Telomere is a region of repetitive nucleotide sequences found at each end on a eukaryotic…

Q: Some portions of the chromosomes are coiled with inactive genes as electron-dense masses of…

A: Packaging of DNA: The DNA in eukaryotes is assembled into chromatin, which are complexes made of…

Q: What is the basic difference between DNA, gene, chromosome, & chromatin? If chromosome does not…

A: DNA: DNA molecule is composed of 2 polynucleotide chains having anti-polarity that coil around each…

Q: Explain why a particular gene might be present in heterochromatin in one cell and euchromatin in…

A: The expression of gene is called the transformation process that is responsible for the production…

Q: If a DNA molecule is 50,000,000 base pairs long, calculate a. the end-to-end length of this DNA in…

A: Total number of base pairs is 50,000,000 Number of DNA base pairs around one histone = 146 base…

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: Define constitutive heterochromatin

A: Chromosomes are thread or string-like structures situated inside the nucleus of creature and plant…

Q: There is an enzyme inhibitor that prevents the histone modification needed to uncoil the 30 nm…

A: DNA replication and transcription of DNA both of them occur by the uncoiling of double stranded DNA…

Q: Why Most Genes in HeterochromatinRegions Are Silenced?

A: Chromatin is the DNA packed with its packaging proteins.

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: