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Harlamova29_29 [7]
2 years ago
6

Using the 100x objective lens from question 6, you estimate 12 organisms could fit across the DFV if they were laid end-to-end a

nd 30 could fit is stacked side-by-side. What is the length and width of this organism (in microns)?
Biology
1 answer:
Bingel [31]2 years ago
3 0

Answer:

Hi how are you doing today Jasmine

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The interaction between DNA and histone proteins (forming nucleosomes) plays a key role in the regulation of gene expression in
ladessa [460]

Answer:

A. The chromatin near cis-regulatory sequences will be more closed and there will be less transcription.

Explanation:

In the presence of histones, the cis-regulatory sequences of DNA like promoter, enhancers etc. are not exposed. The function of the histone acetyltransferases (HATS) is to cause chromosome decondensation i.e. removal of histones from the DNA so that transcription of the DNA could occur. Histone acetyltransferases (HATS) cause acetylation of lysine amino acid of the histone proteins. Acetyl group is negatively charged so the acetylation of histone proteins leads to the removal of their positive charge which ultimately leads to the decrease in the interaction between N terminal of histones and negatively charged phosphate group of the DNA molecule. As soon as histones are removed from the DNA where cis-regulatory sequences are located, the DNA becomes accessible for transcription.

But here a drug has been added which blocks the activity of histone acetyltransferases (HATS) in cancer cells. So it is quite evident that in these cells, histones will not get removed from the cis-regulatory sequences of DNA so the DNA will be more closer or tightly packed as a result of which  less transcription will occur.

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How do nutrients travel through the body
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Hope this helps!
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A star turns matter into energy in the process of ?<br> nuclear fusion
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Sexual reproduction is a process involving the fusion of two gametes to


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The stage is referred to as Mitosis
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