Multiple Choice
Which of the following histone tail modifications is most likely to cause closed chromatin?
4. DNA, Chromosomes, and Genomes
The Epigenetic Code
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Which of the following terms is associated with condensed chromatin?
A
Acetylation
B
Euchromatin
C
Heterochromatin
D
Cell memory
Verified step by step guidance1
Understand the concept of chromatin: Chromatin is a complex of DNA and proteins found in the nucleus of eukaryotic cells. It packages DNA into a more compact, dense shape, which is crucial for DNA replication and gene expression.
Differentiate between euchromatin and heterochromatin: Euchromatin is a less condensed form of chromatin that is generally associated with active transcription of genes. Heterochromatin, on the other hand, is a tightly packed form of DNA, which is transcriptionally inactive and is associated with structural functions or gene regulation.
Explore the role of acetylation: Acetylation is a chemical modification of histone proteins that is associated with the relaxation of chromatin structure, leading to euchromatin formation and increased gene expression.
Define cell memory: Cell memory refers to the ability of cells to remember their identity and maintain their function over time, often through epigenetic mechanisms such as DNA methylation and histone modification.
Identify the term associated with condensed chromatin: Based on the definitions, heterochromatin is the term associated with condensed chromatin, as it represents the tightly packed, transcriptionally inactive form of chromatin.
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