In the eukaryotic nucleus during interphase, a strand of chromatin consisting of eight conserved histone proteins, and a short region of double-stranded DNA wrapped around them, is: A. properly referred to as the radial miniband B. properly referred to as the supersolenoid C. properly referred to as the chromosome D. properly referred to as the nucleosome E. properly referred to as the solenoid

In the eukaryotic nucleus during interphase, a strand of chromatin consisting of eight conserved histone proteins, and a short region of double-stranded DNA wrapped around them, is: A. properly referred to as the radial miniband B. properly referred to as the supersolenoid C. properly referred to as the chromosome D. properly referred to as the nucleosome E. properly referred to as the solenoid

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter8: Dna Structure And Function

Section: Chapter Questions

Problem 5SA: In eukaryotic chromosomes, DNA wraps around _________. a. histone proteins c. centromeres b. sister...

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Define the following terms: a. chromosome b. chromatin
Which of the following statements is TRUE? Group of answer choices a Interphase chromosomes are loosely compacted and do not associate with histones until the cell is preparing to divide. b Interphase chromosomes are loosely compacted, overlapping, and intertwined with each other within the nucleus. c None of these are TRUE d Radial loops in the condensing chromosome are formed due to interactions between 30 nm fibers and the scaffolding proteins of the nuclear matrix - producing the 300 nm fiber of the chromosome e Interphase chromosomes are also known as euchromatin. Condensed, metaphase chromosomes are also known as heterochromatin.
During mitosis, the cohesin protein holds the sister chromatids together and is broken down by the ___________ protein. Shugosin protects cohesin from being broken down in the ________________ region until the anaphase stage when the sister chromatids separate. separase; centromere cyclin; centrosome H1 histone; heterochromatic shugoshin; nuclear ribobuclease; cytoplasmic
Draw and label G1 and G2 stages of interphase and each stage of mitosis (in order) for a cell that has two large and two small chromosomes, 2n=4. For unreplicated chromosome draw a line ( / ) and for replicated chromosome draw an X. Since we are focusing on the DNA, you can skip drawing the nuclear membrane or spindle fibers. For simplicity, do not indicate that the chromosomes are decondensed chromatin during interphase. Mark and label a place on one of the large chromosomes with the dominant allele of the “A” gene and put the recessive allele “a” on the other homolog. Mark and label a place on one of the small chromosomes with allele “B” and put the recessive allele “b” on the other homolog.
Define the following terms and their relationships to one another:A. interphase chromosomeB. mitotic chromosomeC. ChromatinD. heterochromatin e. histonesF. Nucleosome
a. Manually, using a pencil, draw a cell in anaphase II from an organism in which 2n = 2 and each chromosome is metacentric. b. Given that each G1 nucleus from this organism contains 16 picograms of DNA, how many picograms of chromosomal DNA would you expect in the cell shown here?
What is the relation between the concepts of chromatin andchromosome? Are euchromatin and heterochromatin part of chromosomes?
By definition, a pericentric inversion includes the ________. a. centromere b. chiasma c. telomere d. synapse
During which of the following stages of interphase does the chromosomes consist of two chromatids joined at the centromere? Select one: G1 and G2 S and G2 G1 G1, G2 and S
In eukaryotic cells, the nucleosomal core contains which arrangement of histone proteins? A. two H1, one H2A, one H2B, two H3, and two H4 histone proteins B. two H2B, two H2A, two H3, and two H1 histone proteins C. two H3, two H1, two H2A, and two H2B histone proteins D. two H4, two H3, two H2B, and two H2A histone proteins E. two H2A, two H3, two H4, and two H1 histone proteins
What is the function of a centromere? At what stage of the cellcycle would you expect the centromere to be the most important?
Which one of the following statements about nucleosomes is false? a) The DNA double helix wraps around the nucleosome. b) The sequence of amino acid in a histone tail is altered during chromatin remodeling. c) A nucleosome is composed of 8 histone proteins; two copies of each type of histone. d) A large percent of the nucleosome is positively charged.