g about the challenge of folding the 6 billion base pairs in the chromatin into the tiny nucleus. It doesn't just have to fit, you have to be able to find what you need! What do you think of this explanation? Some of the structure is conserved across species and some structure changes cell to cell. Can you explain that?

g about the challenge of folding the 6 billion base pairs in the chromatin into the tiny nucleus. It doesn't just have to fit, you have to be able to find what you need! What do you think of this explanation? Some of the structure is conserved across species and some structure changes cell to cell. Can you explain that?

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter3: Biological Macromolecules

Section: Chapter Questions

Problem 3VCQ: Figure 3.33 A mutation occurs, and cytosine is replaced with adenine. What impact do you think this...

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the challenge of folding the 6 billion base pairs in the chromatin into the tiny nucleus. It doesn't just have to fit, you have to be able to find what you need! Question: Some of the structure is conserved across species and some structure changes cell to cell. Can you explain that?
Nucleosomes are the ball-like structures around which the double helix winds. What proteins make up nucleosomes? Group of answer choices hertone histone heterochromatin euchromatin
For each of the following pairs of chromatin types,which is the most condensed?a. 100 Å fiber or 300 Å fiberb. 300 Å fiber or DNA loops attached to a scaffoldc. euchromatin or heterochromatind. interphase chromosomes or metaphasechromosomes
Figure 3.33 A mutation occurs, and cytosine is replaced with adenine. What impact do you think this will have on the DNA structure?
An explorer discovers a strange new species of plant and sends some of the plant tissue to a geneticists to study. The geneticist isolates chromatin from the plant and examines it with an electron microscope. She observes what appeared to be beads on a string. She then adds a small amount of nuclease, which cleaves the string into individual beads that each contain 280 base pair of DNA. After digestion with more nuclease, a 120 base pair fragment of DNA remains attached to a core of histone proteins. Analysis of the histone core reveals histones in the following proportions. On the basis of these observations what conclusions could the geneticists make about the probable structure of the nucleosome in the chromatin of this plant?
If the DNA of one human cell is stretched out, it would be almost 6 feet long and contain over three billion base pairs. How does all this fit into the nucleus of one cell?
For the question "4. A previously undiscovered single celled organism was found living at a great depth on the ocean floor. Its nucleus contains only a single, linear chromosome consisting of 7x 106 nucleotide pairs of DNA coalesced with three types of histone-like proteins. The analysis of individual nucleosomes revealed that each unit contained one copy of each protein and that the short linker DNA had no protein bound to it If the entire chromosome consists of nucleosomes (discounting any linker DNA), how many are there and how many total proteins are needed to form them?" I was given the answer below: As per question the chromosome contains 7×106 base pairs of DNA, The number of nucleosomes, each containing 7 × 102 base pairs, is equal to : 7 × 106 /7 × 102 = 104 nucleosomes I was wondering how they knew each nucleosome contains 7 × 102 base pairs?
Hypothetically, a cell has DNA that weighs 10 picograms. This cell goes through S phase and is about to undergo mitosis. How much does the DNA of this cell weight now? How much would the DNA of the two cells produced at the end of mitosis weigh? Explain your reasoning.
An explorer discovers a strange new species of plant and sends some of the plant tissue to a geneticist to study. The geneticist isolates chromatin from the plant and examines it with an electron microscope. She observes what appear to be beads on a string. She then adds a small amount of nuclease, which cleaves the string into individual beads that each contain 280 bp of DNA. After digestion with more nuclease, a 120- bp fragment of DNA remains attached to a core of histone proteins. Analysis of the histone core reveals histones in the following proportions: H1 12.5% H2A 25% H2B 25% H3 0% H4 25% H7 (a new histone) 12.5% On the basis of these observations, what conclusions could the geneticist make about the probable structure of the nucleosome in the chromatin of this plant?
An explorer discovers a strange new species of plant and sends some of the plant tissue to a geneticist to study. The geneticist isolates chromatin from the plant and examines it with an electron microscope. She observes what appear to be beads on a string. She then adds a small amount of nuclease, which cleaves the string into individual beads that each contain 280 bp of DNA. After digestion with more nuclease, a 120bp fragment of DNA remains attached to a core of histone proteins. Analysis of the histone core reveals histones in the following proportions: H1 12.5% H2A 25% H2B 25% H3 0% H4 25% H7 (a new histone) 12.5% On the basis of these observations, what conclusions could the geneticist make about the probable structure of the nucleosome in the chromatin of this plant?
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 methylated
Which of the following has beads on a string structure?a) Chromosomesb) Chromatinc) Nucleosomesd) Heterochromatin