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Cell biology lessons in Chine

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10 cell biology teachers in Chine

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10 cell biology teachers in Chine

Cell Biology is a fundamental topic in both the IGCSE and CIE AS/A Level Biology curricula. It focuses on the structure, function, and processesof cells, the basic units of life. Here's a breakdown of the content at each level: --- IGCSE Biology (0610/0970) At the IGCSE level, cell biology introduces foundational concepts about cells, their structures, and processes: 1. Cell Structure and Organization -The Cell as the Basic Unit of Life: - Differences between plant and animal cells. - Identification and functions of cell structures (organelles): - Cell membrane: Controls the movement of substances. - Cytoplasm: Site of metabolic reactions. - Nucleus: Contains DNA and controls cell activities. - Mitochondria: Site of aerobic respiration. - Chloroplasts (plant cells): Site of photosynthesis. - Vacuole: Contains cell sap (large in plants). - Cell wall(plant cells): Provides structure and support. - Use of a light microscope to observe cells. 2. Specialization of Cells. - Specialized cells and their adaptations: - Red blood cells, nerve cells, root hair cells, ciliated cells, sperm cells, etc. - Understanding tissues, organs, and organ systems. 3. Movement of Substances - Processes for the movement of substances across membranes: - Diffusion: Movement of particles from high to low concentration. - Osmosis: Movement of water through a selectively permeable membrane. - Active transport: Movement of substances against a concentration gradient using energy. 4. Enzymes - Enzymes as biological catalysts and their role in cell processes. - Factors affecting enzyme activity: temperature, pH, substrate concentration. CIE AS and A Level Biology (9700) At the AS/A Level, cell biology expands significantly, focusing on advanced concepts, cellular processes, and microscopy: 1. Cell Structure - Prokaryotic vs. Eukaryotic Cells: - Prokaryotes (bacteria) lack a nucleus and membrane-bound organelles. - Eukaryotes (plants, animals, fungi, and protists) have a nucleus and organelles. - Structure and Function of Organelles: - Nucleus: Contains chromatin and nucleolus. - Mitochondria: Site of ATP production (aerobic respiration). - Ribosomes: Site of protein synthesis. - Endoplasmic Reticulum (ER): - Rough ER: Protein transport and modification. - Smooth ER: Lipid synthesis. - Golgi Apparatus: Modification, packaging, and transport of proteins. - Lysosomes: Contain enzymes for digestion. - Chloroplasts (plants): Site of photosynthesis. - Cell membrane: Phospholipid bilayer and fluid mosaic model. - Cell wall: Found in plants, fungi, and prokaryotes. - Microscopy: - Light microscopes and electron microscopes (TEM and SEM). - Calculations: magnification and actual size 2. Cell Membranes and Transport - Structure of the phospholipid bilayer (fluid mosaic model). - Functions of proteins in the membrane: carriers, channels, and receptors. - Transport mechanisms: - Diffusion, facilitated diffusion, osmosis, and active transport. - Endocytosis and exocytosis (bulk transport). 3. Cell Division - Mitosis: - Stages of mitosis: prophase, metaphase, anaphase, and telophase. - Importance of mitosis for growth, repair, and asexual reproduction. - Meiosis: -Production of gametes. - Significance in genetic variation through crossing over and independent assortment. 4. Cell Communication and Enzymes - Role of enzymes in metabolism (anabolic and catabolic reactions). - Cell signaling: How cells communicate via hormones and receptors. 5. Viruses - Virus structure and replication as non-cellular entities (e.g., HIV and influenza). - Summary - At the IGCSE level, cell biology focuses on basic cell structures, specialized cells, diffusion, osmosis, and enzyme functions. - At the AS/A Level, it covers advanced topics such as organelle structure, cell division, membrane transport, microscopy, and the differences between prokaryotic and eukaryotic cells.
Cell biology
Biology · Cell biology
Structure of the plasma membrane The plasma membrane is mainly composed of: Phospholipids: These amphipathic molecules (having both a hydrophilic and a hydrophobic part) are organized into a double lipid layer. This structure gives the membrane its semi-permeable barrier property. Proteins: They are integrated into the lipid bilayer and perform various functions: transport of molecules, reception of signals, cellular recognition, etc. Carbohydrates: Linked to lipids (glycolipids) or proteins (glycoproteins), they play an important role in cell recognition and cellular interactions. Function of the plasma membrane Selective barrier: The plasma membrane allows the selective passage of certain molecules while preventing others. Transport: Membrane proteins provide passive (simple or facilitated diffusion) or active (pumps) transport of molecules across the membrane. Receiving signals: Membrane receptors allow the cell to detect and respond to signals from its environment. Cell recognition: Molecules present on the surface of the membrane allow cells to recognize and interact with each other. Maintenance of homeostasis: The plasma membrane helps maintain a stable intracellular environment by regulating exchanges between the cell and its environment. Properties of the plasma membrane Fluidity: The plasma membrane is not a rigid structure but rather fluid, which allows it to deform and change shape. Asymmetry: The two faces of the plasma membrane have different compositions, which gives the membrane polarity. Plasma membrane models Fluid mosaic model: This model, the most accepted, describes the membrane as a constantly changing mosaic of lipids and proteins.
Cell biology
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Trusted teacher: Hey students!!. I am Dr. Soha, a Highly qualified and experienced tutor who successfully teaches the following subjects - Cell biology, - Molecular biology, - Genetics, - Microbiology, - Biochemistry, and much more along with tests and exam preparation in an easier way. If you are looking for a committed and qualified tutor who can assist you in achieving your academic and professional objectives.... Look no further. Let's get started on your path to success!! I have extensive knowledge in enzymology, stem cell biology, molecular biology, genetics, and stem cell therapy. I am always excited to share my knowledge with students and assist them in reaching their full potential. I am confident that my knowledge and experience qualify me for teaching on an online platform, and I am willing to give more information if necessary. If you are having trouble with your studies or understanding ideas for your tests, you can contact me. I have a variety of resources available, including medical books, videos, slides, and more. I am committed to assisting students in comprehending complicated scientific concepts and ideas in an entertaining and accessible manner. I can help students grasp difficult subjects, and I am sure that my knowledge and expertise will be a great addition to your online learning environment. Furthermore, I offer guidance on optimizing exam performance through self-study techniques. My goals are to build strength, self-confidence, and creativity in my students. The lectures I will provide will be advantageous in all aspects according to students' needs. I assign home tasks and provide periodic progress reports. I can assist you with increasing your critical thinking and problem-solving abilities, understanding difficult medical ideas, and exam preparation. I will provide Notes and Helping material if needed.
Cell biology · Molecular biology · Microbiology
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Only reviews of students are published and they are guaranteed by Apprentus. Rated 4.3 out of 5 based on 6 reviews.

Learn Biology, Chemistry, and Science, Cambridge (IGCSE/GCSE), O/A LEVEL, Medical entrance exam preparation
Dr. Soha
Dr. Soha is a truly amazing and nice teacher. She always makes sure her students understand the concepts in depth and cares a lot about their learning experience! I strongly recommend her services to everyone! :))
Review by FLORENTINA
Biology for school students, university freshman or anyone interested (Chiang Mai)
Siad
Good biology teacher who explains topic clearly and slowly to ensure that I understand everything. Constantly asks questiok to ensure that I understand the content correctly.
Review by PREME
Science, Chemistry, English, Biology Test preparation lessons in line with school curricula
Hagar
Amazing teacher, teaching well and good explanation.
Review by LEEN