what is nucleus? describe it's various parts.
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nucleus is composed of many parts that help it function properly within the cell. The parts that make up the nucleus include the nuclear envelope, nucleolus, and chromosomes/ chromati.
nuclear envelope
Location: The nuclear envelope, also known as the nuclear membrane, encloses the nucleus and nucleolus.
Structure: The nuclear envelope is composed of a phospholipid bilayer with many pores (small holes) that allow RNA and other materials to enter and exit the nucleus.
Function: The many pores in the nuclear envelope allow it to decide what enters and exits the nucleus.
nucleolus
Location: The nucleolus is located inside of the nucleus. It is surrounded by the nuclear envelope. It is NOT membrane- bound.
Structure: The nucleolus is a dense region in the nucleus composed of DNA, RNA, and proteins.
Function: The nucleolus makes ribosomes. This is a very important job inside of the cell.
chromosomes
Location: The chromosomes are located inside of the nucleus.
Structure: Chromosomes are composed of nucleotides, which bond together to form a double helix. This double helix is tightly wrap around a protein to form a chromosome. The unraveled material from a chromosome that floats around in the nucleus is known as chromatin.
Function: Chromosomes contain the genetic information (DNA) of the cell. The chromosomes are the code for all of the functions that occur in a cell.
Ribosomes
Location: Bound Ribosomes- Attached to the Rough Endoplasmic Reticulum
Free Ribosomes- Float around in the cytoplasm.
Structure: Ribosomes are non-membrane bound. They are very tiny and have large and small subunits.
Function: Their function is to make one small protein and one large protein
nuclear envelope
Location: The nuclear envelope, also known as the nuclear membrane, encloses the nucleus and nucleolus.
Structure: The nuclear envelope is composed of a phospholipid bilayer with many pores (small holes) that allow RNA and other materials to enter and exit the nucleus.
Function: The many pores in the nuclear envelope allow it to decide what enters and exits the nucleus.
nucleolus
Location: The nucleolus is located inside of the nucleus. It is surrounded by the nuclear envelope. It is NOT membrane- bound.
Structure: The nucleolus is a dense region in the nucleus composed of DNA, RNA, and proteins.
Function: The nucleolus makes ribosomes. This is a very important job inside of the cell.
chromosomes
Location: The chromosomes are located inside of the nucleus.
Structure: Chromosomes are composed of nucleotides, which bond together to form a double helix. This double helix is tightly wrap around a protein to form a chromosome. The unraveled material from a chromosome that floats around in the nucleus is known as chromatin.
Function: Chromosomes contain the genetic information (DNA) of the cell. The chromosomes are the code for all of the functions that occur in a cell.
Ribosomes
Location: Bound Ribosomes- Attached to the Rough Endoplasmic Reticulum
Free Ribosomes- Float around in the cytoplasm.
Structure: Ribosomes are non-membrane bound. They are very tiny and have large and small subunits.
Function: Their function is to make one small protein and one large protein
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