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Darina [25.2K]
2 years ago
12

If a government entity wanted to write regulations that might reduce smog, what human activities might they want to focus on?

Biology
1 answer:
Scorpion4ik [409]2 years ago
7 0
Industry
Cars
Fuel burning
Use of chlorofluorocarbons
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Scientific knowledge is based on evidence. Where do scientists acquire evidence?
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Answer:

Explanation:

Scientists collect their evidence through experimentation and/or observation.

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3 years ago
. During development, some cells become liver cells, somet
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Cellular differentiation.

Explanation:

Cellular differentiation is the process in which a cell changes from one call type to another. Usually, the cell changes to a more specialized type. Differentiation of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types.

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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
2 years ago
Explain WHY when you put this pan on the stove, the metal pan is too hot to touch, but
harina [27]

Answer:

Then metal pan is a good conductor of heat, so it get hot quickly Making it too hot to touch,while the wooden handle is not a good conductor of heat, it doesn't get hot quickly when compared to them metal pan

Explanation:

Then metal pan is a good conductor of heat, so it get hot quickly Making it too hot to touch,while the wooden handle is not a good conductor of heat, it doesn't get hot quickly when compared to them metal pan

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How long will uncooked prime rib last in the refrigerator
Maru [420]

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3 days

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