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The Nucleus: Structure and Function

Anatomy and Physiology12 CardsCreated 4 months ago

This deck covers key concepts about the nucleus, including its structure, function, and components. It is designed to help students understand the role of the nucleus in eukaryotic cells.

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Are nuclei found in all cells?

No, they are only found in eukaryotic cell not in prokaryotic cells.
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Key Terms

Term
Definition
Are nuclei found in all cells?
No, they are only found in eukaryotic cell not in prokaryotic cells.
What is the general geometric shape of the nucleus?
It is spherical in shape.
What is the general function of the nucleus?
The general purpose of the nucleus is to predetermine and control the production of proteins. It does this by storing the protein code in the DNA, whi...
What is the largest organelle in the cell?
The nucleus is the largest organelle in the cell.
What gives shape, protects and regulates homeostasis in the nucleus?
The nuclear envelope is responsible.
In what 3 ways does the nuclear envelope serve the nucleus?
1. It gives shape to the nucleus. 2. It protects the nucleus. 3. It maintains homeostasis.
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The Nucleus: Structure and Function
TermDefinition
Are nuclei found in all cells?
No, they are only found in eukaryotic cell not in prokaryotic cells.
What is the general geometric shape of the nucleus?
It is spherical in shape.
What is the general function of the nucleus?
The general purpose of the nucleus is to predetermine and control the production of proteins. It does this by storing the protein code in the DNA, which is hereditary.
What is the largest organelle in the cell?
The nucleus is the largest organelle in the cell.
What gives shape, protects and regulates homeostasis in the nucleus?
The nuclear envelope is responsible.
In what 3 ways does the nuclear envelope serve the nucleus?
1. It gives shape to the nucleus. 2. It protects the nucleus. 3. It maintains homeostasis.
Describe the structure of the nuclear envelope.
It is composed of a double layered phospholipid bilayer. Where these layers join, pores are made in the envelope.
What are chromatin and describe their appearance.
Chromatin are proteins bound to DNA and appear as long threads called chromosomes.
What is the most visible structure in the nucleus?
The nucleolus is the most visible portion of the nucleoplasm and functions in the production of ribosomes. Because it produces ribosomes, it controls the production of proteins in the cytoplasm.
What is the nucleolus composed of?
It is composed of nuclear organizers; specialized chromosomes with multiple copies of genes for ribosome synthesis. It also contains considerable amounts of RNA and proteins.
What is constructed in the nucleolus?
The nucleolus copies information on the DNA to the RNA and then attaches the RNA to the proteins making ribosomes. The RNA that makes up ribosomes is called mRNA (messenger RNA).
What are the general contents of the nucleus called and what is it primarily composed of?
The contents are called the nucleoplasm and it is primarily composed of chromatin.