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1 private teacher in Enns

Fatiha - Dellys, AlgeriaRecently active13€
13€General definition of cell, cell structure, the difference between prokaryotic and eukaryotic cell
The cell, the fundamental unit of all living beings, is a complex structure composed of different elements working in harmony. The plasma membrane: the protective envelope The plasma membrane is a semi-permeable barrier that delimits the cell and separates it from its environment. It consists of a double layer of phospholipids, in which various proteins are integrated. These proteins play a crucial role in the transport of substances across the membrane, cell communication and cell recognition. The cytoplasm: the internal environment The cytoplasm is the aqueous medium inside the cell. It contains many organelles, inclusions, and the cytosol. The cytosol is the liquid part of the cytoplasm, rich in enzymes and molecules necessary for the chemical reactions of the cell. The Core: The Control Center The nucleus is a characteristic organelle of eukaryotic cells. It contains the genetic information of the cell in the form of DNA, organized into chromosomes. The nucleus is surrounded by a nuclear envelope pierced by nuclear pores that allow the exchange of molecules between the nucleus and the cytoplasm. Organelles: specialized factories Organelles are specialized structures present in the cytoplasm. Each of them fulfills a specific function: Mitochondria: Nicknamed the "power plants" of the cell, they are the seat of cellular respiration, a process that produces the energy needed by the cell. The endoplasmic reticulum: A network of membranes involved in the synthesis of proteins and lipids. The Golgi apparatus: A set of flattened sacs that modify, package, and distribute proteins and lipids synthesized by the endoplasmic reticulum. Lysosomes: Small vesicles containing digestive enzymes that break down unnecessary or damaged molecules. The cytoskeleton: the skeleton of the cell The cytoskeleton is a network of protein filaments that gives the cell its shape, allows it to move, and organizes its organelles. It is made up of three types of filaments: microfilaments, intermediate filaments, and microtubules. The differences between prokaryotic and eukaryotic cells There are two main types of cells: prokaryotic cells (bacteria) and eukaryotic cells (animals, plants, fungi). Prokaryotic cells are simpler and do not have a nucleus or membrane-bound organelles. Eukaryotic cells, on the other hand, are more complex and have a nucleus and many organelles.
Biology
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Raphaëlle - Bordeaux, FranceRecently active33€
33€Native French Tutor, passionate about sharing knowledge, with 4 years of experience in a Language Training Organization.
Graduated with a Master’s in Information and Communication Sciences, I offer online French courses for learners of all levels (beginner to advanced). With four years of experience in a Language Training Organization, I have had the opportunity to support learners—both native speakers, English speakers, and Spanish speakers—with various needs: - Preparation for official certification exams, - Business training focused on job interview preparation, product presentations, or conference preparation, Advanced level courses emphasizing public speaking, spelling, and syntax, - Conversational training to specifically enhance your speaking skills and work on pronunciation, - Beginner-level training for a thorough introduction to French, including in-depth work on phonetics, grammar, and spoken expression to help you engage confidently in your first conversations. To enhance the interactivity of the lessons and make them more dynamic, I use various types of educational materials: YouTube videos, audio clips (songs, radio shows, etc.), online exercises, and PowerPoint/PDF files with corrections. For advanced levels, it is ideal to conduct our exchanges solely in French to fully immerse you in the language. For beginner levels, reassurance is important, so we can use English or Spanish to help you feel more comfortable. After each lesson, I will provide you with a detailed report with tips to help you continue practicing independently. Enjoy adaptive courses for a true immersion in the heart of the French language. Contact me to start a new linguistic adventure! See you soon!
French
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