Describe the sequence of research findings that led to the development of the model of chromatin structure.

Video transcript

Hi everyone. Let's look at our next question. It says which of the following statements best describes you Chroma tim and let's recall that we have two types of chroma tin. We have the you Cro magnon and the hetero crow martin. So we have our little comparison here. You chroma tin is loosely packed and is the transcribed region of DNA with many genes in it. Hetero chroma tin is densely packed. It's non non transcribed with very few genes and it consists mostly of repetitive sequences near the telomeres and centrum ears. So with that in mind let's look at our answer choices here. Um noting that twist D. Is both A and B. Choice A. Says it is a densely packed form of protein. We see that the densely packed forms the hetero chrome button. So that's not an answer choice choice B says you chromosome regions are known to have little or no transcription activity but that is not correct. The Ukraine Putin is the form that is transcribed so that's incorrect. Of course. We can also see that choice D. Both A and B. Is incorrect. So we're left with choice E. It consists of transcription early active regions of DNA. And that is correct. That's the type of DNA that's transcribed. That loose packing means the RNA polymerase has access to it too for transcription and if you're having trouble keeping them straight. Um a good way to remember it. Is this um prefix on you. Crow metin. This eu prefix which means usually something well done. Something good. Um You think of euphoria meaning like happiness. So you can think of that sort of as the good chroma tin, the chromosome that we get that is transcribed that the genes are on. Um so that's just one quick way to keep the two of them straight. But again, which the following statements best describes you. Crow Metin choice. See it consists of transcription early active regions of D. N. A. See you in the next video.