Answer:The Answer is A
Explanation:
Fungi are heterotrophs because they survive on other organisms.
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.
The level of phospholipid organzation to arrange themselves into to parallel layers.
Here is the answer that would best complete the given statement above. The two cysteine residues in this picture are positioned just right to make the strongest kind of bond that <span>stabilizes tertiary structure. Hope this answers your question. </span>
Technically, choice 3 is correct, but it is a poor answer:
Choice 1: Both parents would have to carry the recessive gene to produce a female child with hemophilia.
Choice 2: A male with hemophilia would have girls who are carriers (one copy of the recessive gene), but they would not have hemophilia.
Choice 3: If a woman has hemophilia (two copies of the recessive gene, which is extremely rare) then all of her sons will have hemophilia and all of her daughters will be carriers.
Choice 4: If the father has hemophilia, then none of his sons will have the disorder because his sons receive only the y chromosome from their father.
Hemophilia is typically inherited from a mother who is a carrier (has one copy of the recessive gene).