I would say C because you start out with the sun, the original source of energy, and the energy goes to the plants, primary producers, which obtain all the energy and make food and also store some "for later", but when the insects, primary consumers, eat the plants they don't get all the energy that the plants had originally taken in, they only get what they had stored "for later" and the rest of the energy dissipates as heat. And the same thing continues up that chain, when frogs eat insects, they don't get all the energy that was in the insect, their stored energy is lost. Hopefully this helps :)
Answer:
C) wear a lead protective shield when having teeth XRAYS
Explanation:
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.
