Question
structure made of DNA found in the nucleus of a cell
Answers
GPT-4o mini
The structure made of DNA found in the nucleus of a cell is known as **chromatin**. Chromatin is a complex of DNA and proteins (mainly histones) that condenses to form **chromosomes** during cell division. In its relaxed form, chromatin allows for the transcription of genetic information and the replication of DNA.
Chromatin can exist in two forms:
1. **Euchromatin**: This is a less condensed form of chromatin that is actively involved in transcription (gene expression).
2. **Heterochromatin**: This is a more tightly packed form of chromatin that is generally transcriptionally inactive and often associated with structural functions.
During cell division, chromatin condenses into visible chromosomes, which are the structures that carry genetic information. Each species has a characteristic number of chromosomes. For example, humans have 46 chromosomes (23 pairs).
Chromatin can exist in two forms:
1. **Euchromatin**: This is a less condensed form of chromatin that is actively involved in transcription (gene expression).
2. **Heterochromatin**: This is a more tightly packed form of chromatin that is generally transcriptionally inactive and often associated with structural functions.
During cell division, chromatin condenses into visible chromosomes, which are the structures that carry genetic information. Each species has a characteristic number of chromosomes. For example, humans have 46 chromosomes (23 pairs).