/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q21CP Describe the levels of DNA packa... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 24: Q21CP (page 874)

Describe the levels of DNA packaging in eukaryotic cells, from B-DNA to a metaphase chromosome

Short Answer

Expert verified

The three chromatin levels are:

1. DNA wrapping 鈥渂eads on the string鈥�.

2. 30 nm chromatin fiber with compact nucleosomes

3. DNA packaging into mitotic chromosomes

Step by step solution

01

DNA packaging

DNA packaging constitutes the folding of an organism鈥檚 DNA into a compact structure that fits inside the nucleus of the cell. The proteins responsible for DNA packaging are histones.

02

The levels of DNA packaging in eukaryotic cells, from B_DNA to a metaphase chromosome

B-DNA of eukaryotic chromatin winds around the histone octamers to generate a nucleosome, which is further condensed by linker histones. The additional condensation happens when chromatin folds into 30 nm diameter filaments, which are then connected in loops to a fibrous protein scaffold to finally create a condensed metaphase chromosome.

The three chromatin levels are:

1. DNA wrapping 鈥渂eads on the string鈥�.

2. 30 nm chromatin fiber with compact nucleosomes

3. DNA packaging into mitotic chromosomes

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

For the RNA sequence AUUGGCAUCCGAUAA, draw the secondary structure that maximizes its base pairing.

Describe the structural differences between A-, B- and Z-DNA including handedness, diameter and presence of grooves.

Describe the methods for visualizing DNA molecules after separation.

How many histone variants occur in human cells? How do they differ from each other? How does the histone variant CENP-A relate to chromosomal structure? Which histone variant is associated with X-chromosome inactivation?

Use the information in Table 11-1 to estimate the half-life, in years, of a phosphodiester bond in DNA.
See all solutions

Recommended explanations on Biology Textbooks

Organ Systems

Read Explanation

Ecosystems

Read Explanation

Biological Processes

Read Explanation

Astrobiological Science

Read Explanation

Control of Gene Expression

Read Explanation

Cell Cycle

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.