Multiple Choice
Interphase chromosomes are more condensed than other forms of chromosomes?
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4. DNA, Chromosomes, and Genomes
Packaging of DNA
Multiple Choice
How are DNA molecules stored and organized within the eukaryotic nucleus?
A
As circular plasmids packaged inside ribosomes for protection and translation
B
As RNA-DNA hybrids stored in the nucleolus until needed for replication
C
As chromatin, where DNA is wrapped around histone proteins to form nucleosomes that further fold into higher-order structures
D
As free, unbound DNA strands dispersed uniformly throughout the nucleoplasm with no associated proteins
Verified step by step guidance1
Understand that DNA in eukaryotic cells is not stored as free strands or circular plasmids; instead, it is highly organized within the nucleus.
Recall that DNA wraps around histone proteins to form nucleosomes, which are the fundamental units of chromatin structure.
Recognize that nucleosomes further fold and coil into higher-order chromatin structures, allowing the long DNA molecules to be compacted efficiently within the nucleus.
Note that this chromatin organization not only compacts DNA but also regulates gene expression and DNA replication.
Conclude that the correct description of DNA storage in the eukaryotic nucleus is as chromatin, where DNA is wrapped around histones forming nucleosomes and higher-order structures.
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