What statements about the modification of chromatin structure in eukaryotes are true?

Which statements about the modification of chromatin structure in eukaryotes are true? Some forms of chromatin modification can be passed on to future generations of cells. Acetylation of histone tails is a reversible process. DNA is not transcribed when chromatin is packaged tightly in a condensed form.

Which of the following is true of eukaryotic regulation of chromatin structure?

Question: Which of the following is true of eukaryotic regulation of chromatin structure? DNA methylation promotes transcription. DNA methylation can persist through successive cell divisions in the same individual.

What role does chromatin play in eukaryotic gene regulation?

The dynamic alternations of chromatin conformation can either activate gene expression by facilitating the interactions between enhancers or other cis-regulatory elements and their target genes or suppress gene expression by blocking the interactions due to steric hindrance.

What changes take place in chromatin structure?

The chromatin state is dynamic, allowing for changes in gene expression in response to cellular signals and/or environmental cues. Changes in chromatin result from the action of ATP-dependent chromatin-remodeling complexes, reversible epigenetic histone modifications, and the incorporation of histone variants.

Why is chromatin only found in eukaryotes?

Chromatin is only found in eukaryotic cells, with prokaryotic cells having a different arrangement of their genetic material called a genophore – a chromosome that doesn’t contain chromatin.

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What is the difference between chromatin and chromatid?

As mentioned above, chromatin is composed of DNA and histones that are packaged into thin, stringy fibers. The chromatin undergoes further condensation to form the chromosome. … A chromatid is either of the two strands of a replicated chromosome. Chromatids connected by a centromere are called sister chromatids.

How does chromatin regulate gene expression?

In eukaryotes, the tight or loose packaging of the genes in chromatin (DNA plus specific proteins) can control whether the genes can be expressed to form their encoded product. DNA itself can be methylation and that also regulates gene expression, generally to turn off the gene. …

What is the process of gene regulation?

Gene regulation is the process of turning genes on and off. During early development, cells begin to take on specific functions. … Gene regulation is accomplished by a variety of mechanisms including chemically modifying genes and using regulatory proteins to turn genes on or off.

What happens when cytosine is methylated?

Cytosine methylation is a common form of post-replicative DNA modification seen in both bacteria and eukaryotes. Modified cytosines have long been known to act as hotspots for mutations due to the high rate of spontaneous deamination of this base to thymine, resulting in a G/T mismatch.

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