“General Science” is the highest scoring as well as the most challenging section for all competitive exams. In this section, you will find important notes on three main subjects of General Science: Physics, Chemistry, Biology, etc.
You can Browse the Subject- wise General Science Notes here:
When it comes to competitive exams like SSC, RRB NTPC, UPSC, and State-level exams, certain biology topics repeatedly make an appearance. Stem Cells is one such topic. If you’ve ever come across questions like “What is the difference between embryonic and adult stem cells?” or “Which Indian institute is leading stem cell research?”, this blog … Read more
The stomach is one of the most fascinating organs in the human body. Often described as a “food processor,” it serves as the central chamber where ingested food is stored, broken down, and prepared for absorption in the intestines. Without the stomach, the process of digestion would be incomplete and inefficient. For students preparing for … Read more
Optics, the branch of physics dealing with light, often fascinates students and challenges aspirants preparing for competitive exams. A key concept within optics is the medium—the environment through which light travels. Light doesn’t always behave the same way; its speed, direction, and behavior depend on the medium it passes through. When you look into a … Read more
If you’ve ever seen a mirage on a hot road or wondered how optical fibers carry internet signals, you’ve already brushed against the magic of Total Internal Reflection (TIR). Let’s break it down step-by-step so you can understand it easily and remember it for your exams. What is Total Internal Reflection? When light passes from … Read more
The universal donor blood group is O negative (O−). This blood type lacks A and B antigens on the surface of red blood cells and also lacks the Rh (Rhesus) factor. Because of this, O− blood can be safely transfused to people of any other blood group in emergencies, regardless of their ABO or Rh … Read more
The human rib cage is a bony framework in the thoracic region made of 12 pairs of ribs, the sternum, and thoracic vertebrae. It protects vital organs like the heart and lungs, supports breathing, and maintains the shape of the chest. Overview of the Human Rib Cage Structure of the Human Rib Cage Component Description … Read more
The adrenal glands are small, triangular endocrine glands located on top of each kidney. They produce vital hormones — including cortisol, aldosterone, adrenaline, and noradrenaline — that regulate metabolism, blood pressure, stress response, immune function, and electrolyte balance. What Are the Adrenal Glands? Main Functions of the Adrenal Glands Hormone Produced By Primary Function Cortisol … Read more
Sweat is a watery fluid secreted by sweat glands to regulate body temperature and maintain skin health. Knowing its composition, function, and related facts is important for general science sections of many competitive exams, where direct MCQs are common. Composition of Sweat – Quick Revision Component Percentage / Level Function Water ~99% Cooling, solvent for … Read more
Saliva is a watery secretion produced by the salivary glands in our mouth. It plays a vital role in digestion, oral health, and the lubrication of food. For exam aspirants, knowing the composition of saliva is important because it is a frequently asked topic in UPSC, SSC, Railways, Banking, Defence, and State PSC exams. Let’s … Read more
Lymph is a vital body fluid that plays an essential role in maintaining immunity, nutrient transport, and fluid balance. While most students preparing for competitive exams like UPSC, SSC, Banking, Railways, Defence, and State PSCs are familiar with blood composition, the composition of lymph often gets overlooked. However, examiners frequently frame direct and indirect questions … Read more
The aorta is the largest artery in the human body, emerging from the left ventricle of the heart. Its primary function is to carry oxygenated blood from the heart and distribute it to all parts of the body through systemic circulation. 👉 Why important for exams?Questions on the aorta are frequently asked in General Science, … Read more
Proteins are the building blocks of life, and among them, albumins play a crucial role in maintaining our body’s balance and health. From regulating blood pressure to transporting vital substances, albumin is indispensable. In fact, measuring serum albumin levels is one of the most common diagnostic tests in hospitals worldwide. In this article, we will … Read more
When you go for a blood test, the report often highlights findings from serum analysis. But what exactly is serum, and why does its composition matter so much in medicine? Serum is the liquid portion of blood that remains after clotting. It is a rich source of proteins, electrolytes, hormones, antibodies, and metabolic waste products—making … Read more
When we think about digestion, the stomach or intestines often come to mind. Yet, the very first step of digestion begins in the mouth, thanks to the salivary glands. These small but vital organs secrete saliva, which not only aids digestion but also protects oral health. Understanding salivary glands is crucial for medical students, dental … Read more
A zygote is the single, diploid cell formed when a sperm fertilizes an egg. In humans, it forms in the fallopian tube, begins rapid mitotic divisions (cleavage), and develops into a morula by day 3–4 and a blastocyst by day 5–6, typically implanting around day 6–7. The zygote is totipotent, meaning it can give rise … Read more
Blood pressure is a vital topic in competitive exams, especially in the Biology and General Science sections. This blog simplifies key concepts—normal range, types, causes, symptoms, and health risks—using exam-friendly language. Strengthen your preparation with accurate, concise, and clear explanations tailored for quick understanding and effective revision. Why Blood Pressure Matters ◾Blood pressure is a … Read more
The spleen is one of the most underrated yet crucial organs of the human body. Often overshadowed by more prominent organs like the liver or kidneys, the spleen plays a vital role in immunity and blood maintenance. For students appearing in competitive exams like UPSC, SSC, NEET, or other state-level tests, understanding the spleen’s structure … Read more
Blood is the vital fluid that sustains life, carrying oxygen, nutrients, hormones, and waste throughout the body. While red and white blood cells often take the spotlight, a lesser-known yet crucial component is blood plasma. Accounting for over 50% of total blood volume, plasma serves as the medium that supports and transports blood cells and … Read more
The nephron is the functional and structural unit of the kidney. Each human kidney contains about 1 to 1.5 million nephrons, and each nephron is responsible for the filtration of blood and formation of urine. Understanding the structure and function of each part of a nephron is crucial for exams like NEET, UPSC, SSC, RRB … Read more
Acids are one of the most important chemical substances in our daily life and industrial processes. From the sour taste of lemon to the acidic nature of gastric juices, acids play a crucial role in both biological and chemical systems. Understanding their properties is essential for competitive exams like SSC, UPSC, RRB, and various state … Read more
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