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Define the following terms:
a. histones
b. heterochromatin
c. euchromatin
d. intergenic sequences
e. tandem repeats
Step by step
Solved in 2 steps
- Define the following terms: a. histone b. heterochromatin c. spermine d. intergenic sequences e. tandem repeatsDefine the following terms:a. positive supercoilingb. negative supercoilingc. polyaminesd. chromatine. nucleosomeExplain the following terms: Non-histone Chromosomal (NHC) proteins, euchromatin & Heterochromatin.
- Using the figure below identify: What is the role of histones and nucleosomes? How the process of chromatin condensation is performed? What is a function of introns and exons? What is a role of mobile DNA elements? What is a meaning of simple-sequence DNA?Define the following terms and their relationships to one another:A. interphase chromosomeB. mitotic chromosomeC. ChromatinD. heterochromatin e. histonesF. NucleosomeGive examples of constitutive and facultative heterochromatin in:a. Drosophilab. humans
- Which of the following statements is NOT true about chromatin architecture? A. The histone tails on heterochromatin are deacetylated B. Heterochromatin is heavily methylated C. Euchromatin is more likely to contain genes that are expressed at that time D. Euchromatin is heavily methylatedConsider the figure beow, which depicts chromatin within the neucleus of a eukaryotic cell. nucleus O The letter A indicates regions of a single chromosome which are not expressed, and the letter B indicates regions of a single chromosome which are expressed. O Both answer choice A and answer choice B are correct. The letter A indicates regions of a single chromosome which are condensed and attached to the nuclear lamina, and the letter B indicates regions of a single chromosome which are partially decondensed. O Answer choices A, B and C are all correct. O The letter A represents repressed TADS, and the letter B represents active TADS.Discuss the levels of chromosomal organization with reference to the following terms: a. nucleotide b. DNA double helix c. histones d. nucleosomes e. chromatin
- Define the following terms: a. chromosome b. chromatinAll of the following statements regarding nucleosomes are true EXCEPT A each bead-like structure contains 8 molecules of histones H1, H2A, H2B, H3 and H4 the bead like structures are made up of core histones wrapped around by the DNA strands the histone proteins in the nucleosomes contain positively charged amino acids that interact with the negatively charged DNA D the bead like structures are linked to each other by the DNA chainA cell is homozygous for a LOF mutation in the histone acetyltransferase (HAT) gene. Which of the following is/are true? a. Chromatin in the cell will be more condensed than usual, decreasing expression of genes that should be expressed. b. This will lead to histones with more positive charges on their tails, increasing the interaction between histones and the DNA backbone. c. This will lead to a decrease in DNA methylation and therefore cause an increase in gene expression. d. Chromatin in the cell will be less condensed than usual, increasing expression of genes that should not be expressed.