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Sergio [31]
3 years ago
6

Will give Brainliest (8th grade science) HELP

Biology
1 answer:
Gemiola [76]3 years ago
5 0
I think it’s a galaxy im sorry if I’m wrong !!
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Which statements about the modification of chromatin structure in eukaryotes are true? Select all that apply. View Available Hin
Kay [80]

The correct answers are:  

  • Methylation of histone tails in chromatin can promote condensation of the chromatin.
  • DNA is not transcribed when chromatin is packaged tightly in a condensed form.
  • Acetylation of histone tails is a reversible process.
  • Some forms of chromatin modification can be passed on to future generations of cells.  
  • Acetylation of histone tails in chromatin allows access to DNA for transcription.

Histone modifications are post-translational modifications of histone protein that can affect gene expression by altering chromatin structure or recruiting histone modifiers.The most common modifications are methylation, phosphorylation, acetylation and ubiquitylation. All of them affect the binding affinity between histones and DNA and thus loosening (gene activation) or tightening (gene repression) the condensed DNA.

Histone methylation is a transfer of methyl group by histone methyltransferases to lysine or arginine amino acid of protein. Effect of methylation depends on the type of protein that is modified. Demethylation is the reverse process.

Histone acetylation is the process of adding of an acetyl group(by  histone acetyltransferases) to histone proteins and it can also activate or inhibit the gene expression. Deacetilation is reverse process.

7 0
3 years ago
Josiah says this is a phylogenetic tree of the dinosaurs. Maleek says it is a cladogram of the dinosaurs. Who is correct?
Verdich [7]

C. Both are correct,

5 0
3 years ago
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Will mark brainliest
ElenaW [278]

Answer:

One parent was homozygous for white flowers and the other was hoozygous purple, and  Both parents had purple flowers?

Explanation:

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3 years ago
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What was an important belief in the world at the time of Darwin’s upbringing
earnstyle [38]

Answer:

It represents religious beliefs on the nature of life. Whereas he saw religion as a tribal strategy of survival, Darwin always believed that he was God's ultimate legislator, and he then remembered that he was convinced that God was a first cause and that he was called a theist at that time.

Explanation:

It represents religious beliefs on the nature of life. Whereas he saw religion as a tribal strategy of survival, Darwin always believed that he was God's ultimate legislator, and he then remembered that he was convinced that God was a first cause and that he was called a theist at that time.

Hope this helps.

6 0
2 years ago
What are the three domains of life?
sammy [17]
D. Archaea, bacteria,eukarya
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