The nucleus is a defining characteristic of eukaryotes. The nucleus has a nuclear membrane that contains the DNA genome of a eukaryotic cell.The DNA is organized in the nucleus because it is condensed with histone proteins.

Nucleus

The endoplasmic reticulum is responsible for synthesizing molecules in the cell. It is make of a lipid bilayer and is connected by tubules and flat sacs called cisternae. 

There are two types of endoplasmic reticulum with their own molecules they synthesize. 
- Rough endoplasmic reticulum
- Smooth endoplasmic reticulum

Endoplasmic Reticulum

The Golgi apparatus contains enzymes that modify lipids and proteins that were transported from the endoplasmic reticulums. It can typically modify them by making them glycolipids or glycoproteins which are important for the plasma membrane. The Golgi apparatus has a stacked disk appearance and it is made of a lipid bilayer.

The Golgi Apparatus

Lysosomes are organelles that contain digestive enzymes. These enzymes break down parts of the cell that are not needed for the cell anymore such as damaged organelles or debris. 

Lysosomes

Vacuoles are formed off of the plasma membrane in a process called phagocytosis.

Vacuole

The mitochondria is responsible for aerobic respiration in eukaryotes. It contains two lipid membranes which are the inner and outer membranes. The inner membrane is the site for the electron transport chain for aerobic respiration. The mitochondrial matrix is also an important site for metabolic enzymes and the mitochondrial DNA.

Mitochondria

Peroxisomes produce hydrogen peroxide which is needed to break down amino acids and uric acid. Peroxisomes also have catalase which degrades hydrogen peroxide. Peroxisomes, like lysozymes, are important in compartmentalizing degradation molecules to protect the cell. 

Peroxisome

A multi-membrane organelle where photosynthesis occurs in eukaryotes

Chloroplast

Eukaryotes have membrane-bound organelles, each with their own structure and function. Organelles commonly found in eukaryotes include:
- Nucleus
- Endoplasmic Reticulum
- Golgi Apparatus
- Lysosome
- Vacuole
- Mitochondria
- Chloroplast
- Peroxisomes

University of Wisconsin - Madison

Austin Community College

A eukaryotic cell has a membrane bound nucleus and membrane bound structures called organelles, which have specialized functions. Eukaryotic means "true nucleus" and the word organelle implies "little organ". Organelles have specific cellular functions similar to the way organs have specialized functions. 

Eukaryotic cell

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

OpenStax Concepts of Biology provides the necessary breadth and depth for core Biology concepts.

Link: https://openstax.org/details/books/concepts-biology/

OpenStax Biology 2nd Edition

The domain Eukarya contains members called eukaryotes, defined by their eukaryotic cells.

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