Describe the organization of the interphase nucleus. Include in y...

Question

Describe the organization of the interphase nucleus. Include in your presentation a description of chromosome territories, interchromatin compartments, and transcription factories.

Accepted Answer

Welcome back. Let's look at our next problem. It says chromosome territories are the regions of the nucleus that are occupied by a particular chromosome. Molecular diffusion into the chromosome territories is facilitated by So let's look at our answer choices here. We have nuclear zone transcription factories. Intercom button compartments and you crow, maten and hetero chromatic are correct. Answer here is going to be inter chromosome compartments. These are nuclear compartments without D. N. A. And you can kind of tell by the name here inter chromatic apartment. So between chrome button so without D. N. A. And it's not that they allow a form of tunneling into the chromosome territories that allow molecular diffusion to those very tightly packed ear's we call the chromosome gets very tightly packed together. So these little tunnels allow molecules to diffuse into those regions kind of providing that space there. So that's your correct answer. Let's understand why the others are not correct. Choice A. Is a nuclear zone. And of course the nuclear zone is that kind of basic unit of protein structure, those beads on a string that it consists of the DNA wrapped around the his stones. So Choice A. Is not correct. Choice B transcription factories. Um These are those sites where where transcription occurs in the nucleus, as you can tell by their name. You might guess transcription factory. But it's not regions that allow diffusion of molecules into the chroma tin. So where transcription occurs. So not our correct answer. And then finally, Choice D. You crow maten and hetero chroma 10. Those are those two types of chroma tin. The hetero chroma tin being that highly condensed version. So it has very few genes and no gene transcription happening there. And you hear metin being the looser less compacted, less condensed versions of chrome a tin um where you have genes being expressed. But that doesn't have to do with a molecular diffusion into the chromosome territories, so that is incorrect. So again, molecular diffusion into the chromosome territories is facilitated by choice. See inter chromosome compartments. See you in the next video.

Describe the organization of the interphase nucleus. Include in your presentation a description of chromosome territories, interchromatin compartments, and transcription factories.

Key Concepts

Chromosome Territories

Interchromatin Compartments

Transcription Factories

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