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DNA Packing Stages and Chromatin Structure

5 Questions

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DNA Packing Stages and Chromatin Structure

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Questions and Answers

What is the diameter of a nucleosome?

11 nm

1400 nm

6 nm (correct)

30 nm

Which of the following represents the highest level of DNA packing?

Nucleosomes

Filaments

Chromatin loops

Metaphase chromosome (correct)

What is the diameter of chromatin fibers?

30 nm (correct)

700 nm

6 nm

11 nm

Which of the following is associated with highly condensed regions of the chromosome?

<p>Heterochromatin</p> Signup and view all the answers

What process occurs during metaphase regarding chromatin loops?

<p>They condense to form the metaphase chromosome.</p> Signup and view all the answers

Study Notes

DNA Packing Stages

DNA wraps around histone proteins, forming nucleosomes (6 nm in diameter).
Nucleosomes are further packed into filaments (11 nm in diameter).
Filaments are then organized into chromatin fibers (30 nm in diameter).
Chromatin fibers condense into chromatin loops (300-700 nm in diameter).
During metaphase, chromatin loops undergo further condensation to form metaphase chromosomes (1400 nm in diameter).
Heterochromatin represents highly condensed regions of chromosomes, contributing to the compact structure.
The process of DNA packing involves multiple stages, resulting in a highly compacted structure within the nucleus.
This compaction is crucial for proper segregation of chromosomes during cell division.

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Description

Explore the intricate stages of DNA packing and how it leads to the formation of chromatin. Understand the process from nucleosomes to metaphase chromosomes, as well as the significance of heterochromatin in chromosome structure. This quiz covers essential concepts in molecular biology and genetics related to DNA organization.