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Chromosomes, Chromatin, Chromatids Video Lecture - NEET
FAQs on Chromosomes, Chromatin, Chromatids Video Lecture - NEET
| 1. What are chromosomes and what is their function in the cell? |  |
Ans.Chromosomes are thread-like structures located in the nucleus of eukaryotic cells, composed of DNA and proteins. Their primary function is to store and organize genetic information, ensuring proper distribution of genetic material during cell division.
| 2. How does chromatin differ from chromosomes? | |
Ans.Chromatin is a less condensed form of DNA that exists during interphase, allowing for DNA replication and transcription. In contrast, chromosomes are highly condensed structures formed during cell division, making it easier to segregate the genetic material.
| 3. What are chromatids and when do they form? | |
Ans.Chromatids are identical halves of a duplicated chromosome, formed during the S phase of the cell cycle. Each chromosome consists of two sister chromatids joined at a region called the centromere, which separates during cell division.
| 4. Why is the structure of chromosomes important for cell division? | |
Ans.The structure of chromosomes is crucial for cell division because it ensures accurate segregation of genetic material. The compact form of chromosomes prevents entanglement and damage during the separation process, reducing the risk of genetic disorders.
| 5. How do changes in chromatin structure affect gene expression? | |
Ans.Changes in chromatin structure, such as modifications to histones and DNA, can either promote or inhibit gene expression. When chromatin is loosely packed, genes are more accessible for transcription, while tightly packed chromatin can silence gene activity.
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