Biology teacher

  Small Molecular Weight Organic Compounds in Living Tissues (NEET Biology Notes) Biomolecules in Living Tissues: Complete NEET study chart covering carbohydrates, amino acids, lipids, nucleotides, DNA and RNA. Chapter: Biomolecules -Dr.Sanjaykumar Pawar  Introduction Living organisms are made up of different types of organic molecules . These molecules are called biomolecules because they are essential for life. The four major groups of biomolecules are: Carbohydrates (Sugars) Proteins (Amino acids) Lipids (Fats and Oils) Nucleic Acids (DNA & RNA building blocks) These molecules perform different functions such as providing energy, building body tissues, storing food, and carrying genetic information. 1. Carbohydrates (Sugars) What are carbohydrates? Carbohydrates are the main source of energy in living organisms. They are made up of three elements: Carbon (C) Hydrogen (H) Oxygen (O) General formula: (CH₂O)ₙ Examples shown in the figure (A) Glucose Molecular Formula: C₆...

Difference Between Prokaryotic and Eukaryotic Cells: NEET Notes for Beginners Comparison of Prokaryotic and Eukaryotic Cells with key structures explained for NEET Biology preparation. - Dr.Sanjaykumar Pawar  Bacterial Cell Structures (Continuation) Some bacterial membrane extensions help in: Cell division (formation of daughter cells) DNA replication and distribution Respiration Secretion processes Increasing surface area of plasma membrane Increasing enzyme content Chromatophores (in some bacteria) Found in cyanobacteria They are membrane extensions inside cytoplasm Contain photosynthetic pigments Help in photosynthesis Movement in Bacteria Some bacteria are motile (can move) Some are non-motile (cannot move) Flagella Long, thin, thread-like structures outside cell wall Help in movement (motility) Present only in motile bacteria Structure of flagellum Made of 3 parts: Filament → longest outer part Hook → connects filament to basal body ...

  https://bioteacher-iq.blogspot.com/ Chapter 18: Neural Control and Coordination Easy NEET Notes (Line by Line Explanation) Introduction Our body has many organs like heart, lungs, kidneys, muscles etc. All these organs must work together properly. This is called coordination . What is Coordination? Definition Coordination means: Two or more organs work together They help each other perform functions properly It maintains balance inside body ( homeostasis ) Homeostasis Maintenance of constant internal environment Example: Normal body temperature Normal blood pressure Proper oxygen level Example of Coordination During Exercise When we do physical exercise: Step 1: Muscle activity increases Muscles need more energy Step 2: Oxygen demand increases More oxygen is required to produce energy Step 3: Respiration rate increases Lungs work faster Breathing rate increases Step 4: Heartbeat increases Heart pumps blood faster Step 5: Blood flow incr...

Diagram showing lymph formation, circulatory pathways, and structure of the human heart for easy understanding. 💧 15.2 Lymph (Tissue Fluid) 🔹 How lymph is formed: Blood flows through capillaries (small blood vessels) Some water + small dissolved substances move out of blood 🔹 Where does this fluid go? It enters spaces between body cells 🔹 What remains in blood? Large proteins Most blood cells 🔹 This fluid is called: 👉 Interstitial fluid / Tissue fluid 🔹 Movement of substances: Nutrients, gases move between: Blood ↔ Cells This exchange happens through this fluid 🔹 Lymphatic system: A network of vessels collects this fluid Returns it back to blood (veins) 🔹 What is lymph? Fluid inside lymph vessels = Lymph 🔹 Composition of lymph: Similar to plasma Contains lymphocytes (WBCs) 🔹 Functions of lymph: Immunity (defense) Transport of: Nutrients Hormones Fats 🔹 Special point: Fats are absorbed by lymph in lacteals (intest...