Explanation:
<h3>
<u>Packa</u>g<u>in</u>g<u> Of Dna Double </u><u>Helix</u>:</h3>
Prokaryotes
↬ No well defined nucleus.
↬ DNA is held with some proteins in nucleoid region.
Eukaryotes
↬ <u>Histones</u>:
- ↬ Positively charged proteins.
- ↬ Rich in arginine and lysine.
- ↬ 5 types:- H₁ H₂A, H₂B, H₃ H₄.
↬ <u>Histone octamer</u>:
↬ <u>Nucleosome</u>:
- ↬ DNA (-ve charge) makes two complete turns around the histone octamer (+ve charge) to form a nucleosome.
The Lac repressor prevents the Lac genes in the DNA of E.coli from being expressed most of the time. The Lac repressor is actually a kind of DNA binding protein. It is a fact that in case there is an absence of lactose, the Lac repressor binds to the proteins. I hope that this answer comes to your help.
Have a great day!
OK well first of all I hate biology but I like writing so you can use :: The molecular reactions of cellular respiration transform Krebs cycle into the more readily available bond energy of ATP.
The answer is D .. the bacteria can become immune to the antibiotics over time