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Factors Affecting Enzyme Activity Class 11 Biology Notes | CBSE & NEET Factors Affecting Enzyme Activity ( NEET Note- Explanation)  Factors Affecting Enzyme Activity showing the effects of temperature, pH, substrate concentration, Vmax, and competitive inhibition for CBSE Class 11 and NEET Biology. -Dr.Sanjaykumar Pawar  What are Factors Affecting Enzyme Activity? Definition: Factors affecting enzyme activity are the conditions that can increase or decrease the speed of enzyme-catalysed reactions. Main Factors Temperature 🌡️ pH Substrate Concentration Inhibitors (Specific Chemicals) NEET Tip: Remember these four factors as "TPSI" T = Temperature P = pH S = Substrate concentration I = Inhibitors Line-by-Line Explanation Line 1 "The activity of an enzyme can be affected by a change in the conditions which can alter the tertiary structure of the protein." Easy Meaning Enzymes are proteins. Proteins have a special 3D (tertiary) struc...

  NCERT Class 11 Biology: Viruses, Viroids, Prions and Lichens Explained Simply - Dr.Sanjaykumar Pawar  Viruses Viruses are acellular (non-cellular) Comparison of Viruses, Viroids, Prions, and Lichens showing structure, composition, and biological roles in Class 11 Biology. organisms . They are not considered fully living because they do not have a cellular structure. Outside a host cell, viruses remain inactive and crystalline (non-living form) . Inside a living cell, they become active and use host machinery to reproduce . They are called obligate intracellular parasites (can live and reproduce only inside host cells). They kill or damage host cells during reproduction. The word virus means “poisonous fluid” . Discovery of Viruses (Important for exams) Dmitri Ivanovsky (1892) discovered microbes causing tobacco mosaic disease. These agents were smaller than bacteria and passed through bacteria-proof filters. M.W. Beijerinck (1898) named them “virus” a...

Significance of Mitosis & Meiosis | Class 11 Notes, MCQs  Comparison of Mitosis and Meiosis showing stages of cell division and chromosome behavior in Class 11 Biology. - Dr.Sanjaykumar Pawar  🌿 Significance of Mitosis (Equational Division) Mitosis is a type of cell division where one cell forms two identical daughter cells . It is also called equational division because chromosome number remains the same. Mostly occurs in diploid (2n) cells . In some lower plants and social insects, even haploid cells can undergo mitosis . 📌 Main Importance of Mitosis Mitosis produces genetically identical daughter cells (same DNA as parent cell). It is responsible for growth of multicellular organisms . As cells grow, the nucleus-cytoplasm ratio gets disturbed . So, mitosis helps to restore proper nucleus–cytoplasm balance . 🌱 Role in Growth and Repair Mitosis helps in increase in number of cells → growth of body . It is essential for repair and replacement of wo...

  Unit 3 – Cell: Structure and Functions  - Dr.Sanjaykumar Pawar  Easy Line-by-Line Notes (NEET Level for Beginners) 1. “Biology is the study of living organisms.” Biology = science of life. It studies plants, animals, microbes, and humans. 2. “The detailed description of their form and appearance only brought out their diversity.” Living organisms look different from each other. Example: bacteria, plants, and humans all have different shapes and sizes. 3. “Cell theory emphasised the unity underlying this diversity of forms.” Even though organisms look different, all are made of cells. This common feature is explained by Cell Theory . 4. “The cellular organisation of all life forms.” Every living organism is made of one or more cells. Cell = basic structural and functional unit of life. 5. “A description of cell structure and cell growth by division...” Cells have different parts called organelles. Cells grow and reproduce by cell division. ...

  Endocrine System Summary Notes (NEET Biology – Easy Line by Line Explanation)  - Dr.Sanjaykumar pawar 1. Hormones and Their Functions Hormones are special chemical messengers produced by endocrine glands. They help in: Coordination of body activities Regulation of body functions Integration between organs Hormones control: Metabolism Growth Development Reproduction Homeostasis 2. Endocrine System Organs The human endocrine system includes: Hypothalamus Pituitary gland Pineal gland Thyroid gland Adrenal gland Pancreas Parathyroid gland Thymus Gonads: Testis (male) Ovary (female) Other organs also producing hormones: Gastrointestinal tract Kidney Heart 3. Pituitary Gland (Master Gland) Divisions of Pituitary The pituitary gland has 3 parts: (i) Pars distalis (Anterior pituitary) Produces 6 trophic hormones. Trophic hormones regulate other endocrine glands. (ii) Pars intermedia Secretes only one hormone: MSH (Melanocyte Sti...