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Cell Wall: Type, Structure and Function

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The hard non-living covering found outside the protoplasmic membrane of plants is called cell wall. The bacterial cell wall is made up of proteins, lipids and polysaccharides.  Apart from this, N-acetyl glucosamine acid and N-acetyl muramic acid are found in the cell wall. The cell wall protects the cell from mechanical damage and infection, as well as maintains interactions between cells and provides a barrier to undesirable macromolecules. The cell wall in fungi is made up of chitin or fungal cellulose. The cell wall of algae is made up of cellulose, galactans and minerals like calcium carbonate. In other plants it is made up of cellulose, hemicellulose, pectin and lignin. The cell wall is a wall-like layer that surrounds the protoplasm. It encloses the protoplasm and acts as a safety cover. Structure Now that we have known what is a cell wall, let us have a look about its structure.  On the basis of structure the following types of cell wall are found. 1. Primary wal...
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What is a Cell? Definition, Structure, Types, and Functions

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What is a Cell? Definition, Structure, Types, and Functions What is cell ? ​The cell is the ultimate fundamental building block of all living organisms. From microscopic single-celled bacteria to complex multicellular organisms like humans, trees, and animals, life cannot exist without cells. It is often referred to as the structural, functional, and biological unit of life. ​In this comprehensive guide, we will explore the definition of a cell, its historical discovery, the cell theory, different types of cells, their detailed structures, and essential functions. ​What is a Cell? (Definition) ​In biology, a cell is defined as the smallest, membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. ​A single cell is often a complete organism in itself, such as a bacterium or yeast. Other cells acquire specialized functions as they mature. These cells cooperate with other specialized cells and become the building blocks of larg...
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सुदूर संवेदन क्या है? परिभाषा, प्रकार, इतिहास और अनुप्रयोग (What is Remote Sensing in Hindi)

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​आज की उन्नत तकनीक के युग में, पृथ्वी और ब्रह्मांड के रहस्यों को जानने के लिए विज्ञान ने कई अद्भुत आविष्कार किए हैं। इन्हीं में से एक अत्यंत महत्वपूर्ण तकनीक है सुदूर संवेदन (Remote Sensing) । मौसम का पूर्वानुमान लगाने से लेकर, बाढ़ की चेतावनी, वनों की स्थिति और नक्शे बनाने तक, हर जगह इस तकनीक का व्यापक उपयोग हो रहा है। ​इस लेख में हम विस्तार से जानेंगे कि सुदूर संवेदन क्या है, यह कैसे काम करता है, इसके प्रकार, इतिहास और इसके विभिन्न व्यावहारिक अनुप्रयोग क्या हैं। ​सुदूर संवेदन की परिभाषा (Definition of Remote Sensing) ​सरल शब्दों में, सुदूर संवेदन (Remote Sensing) वह विज्ञान और कला है, जिसके माध्यम से किसी वस्तु, क्षेत्र या घटना के सीधे भौतिक संपर्क में आए बिना (Without physical contact), दूर से ही उसके बारे में बहुमूल्य जानकारी प्राप्त की जाती है। ​तकनीकी भाषा में: ​ "हवाई जहाजों, उपग्रहों (Satellites), या ड्रोन में लगे विशेष सेंसरों (Sensors) की मदद से पृथ्वी की सतह से परावर्तित या उत्सर्जित विद्युत चुंबकीय विकिरण (Electromagnetic Radiation) को रिकॉर्ड करना और उसका विश्ल...
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