La CÉLULA EUCARIOTA 🦠 | Características, Partes y Funciones

Characteristics of Eukaryotic Cells

What is a Eukaryotic Cell?

• A eukaryotic cell is the basic unit of life for plants, animals, fungi, and protozoa. These organisms are referred to as eukaryotes.

• Key characteristics include having a true nucleus protected by cytoplasm and membrane-bound organelles.

• Eukaryotic cells range in size from 10 to 100 micrometers, making them larger than prokaryotic cells.

• They can be unicellular or multicellular organisms, including both simple and complex forms like animals.

• Eukaryotic cells require energy for vital functions, absorb nutrients or utilize solar energy, and contain genetic material within the nucleus.

Parts of the Eukaryotic Cell

• The structure functions as a coordinated mechanism with various organelles performing specific roles.

• Organelles include:

• Nucleus: Stores genetic information; site of RNA synthesis.

• Cell Wall: Present in some eukaryotes (e.g., plants), providing support and regulating osmotic exchange; absent in animal cells.

• Ribosomes: Synthesize proteins; composed of 60% protein and 40% RNA.

Additional Organelles

• Cytoplasm: Contains all organelles; filled with cytosol made up of ions, glucose, amino acids, etc.

• Mitochondria: Features folds called cristae to increase surface area for electron transport during respiration.

• Endoplasmic Reticulum (ER):

• Rough ER: Studded with ribosomes for protein synthesis.

• Smooth ER: Lacks ribosomes; involved in lipid synthesis and detoxification processes.

Functions of Eukaryotic Cells

Vital Functions

• The primary function is to sustain life through various processes that must be completed effectively.

• Key functions include:

• Respiration: Occurs in mitochondria producing necessary energy for cellular activities.

• Protein Synthesis: Facilitated by ribosomes located on rough ER.

• Lipid Synthesis & Toxin Elimination: Managed by smooth ER to maintain cell functionality.

Transport and Processing

• Products from rough ER are transported via Golgi apparatus which packages them into vesicles for easier transport.

• Molecule processing occurs within lysosomes and peroxisomes specializing in breaking down harmful substances like hydrogen peroxide.

Genetic Information Management

• All genetic information is stored within the nucleus where transcription and translation occur as part of gene expression processes.