Root Hair Cells – Structure, Formation, Functions

Root Hair Cells

What are root hair cells? Structure of Root Hair Root hairs are slender, tubular extensions of epidermal cells located at the root tips, specializing in water and nutrient absorption. Their unique structure is optimized for efficient interaction with the soil environment, allowing plants to maximize the uptake of essential resources. Key Components of Root Hair … Read more

Visualisation of animal and plant cells Under Microscope

Visualisation of animal and plant cells Under Microscope

What are animal and plant cells? Animal and plant cells serve as the building blocks of life for animals and plants, respectively. Both are eukaryotic cells, meaning they contain a true nucleus and specialized organelles, but they also display significant structural and functional differences. Animal Cells Animal cells are generally smaller and have a flexible, … Read more

Stomata – Definition, Structure, Mechanism, Functions

Stomatal Opening and Closing

Wha is Stomata? Definition of Stomata Stomata are tiny pores located on the epidermis of plant leaves and stems that regulate gas exchange, allowing carbon dioxide, oxygen, and water vapor to enter and exit the plant. Each stoma is flanked by guard cells that control its opening and closing, facilitating processes such as photosynthesis and … Read more

Calvin Cycle – Definition, Steps, Products, Functions

Calvin Cycle - Definition, Steps, Products, Functions

What is Calvin Cycle? The Calvin Cycle, also known as the C3 cycle or Calvin-Benson cycle, is a critical biochemical process in photosynthesis that enables plants to convert carbon dioxide into organic compounds, primarily glucose. Named after Melvin Calvin, who discovered the pathway in the 1950s, this cycle occurs in the stroma of chloroplasts in … Read more

Human Immunodeficiency Virus (HIV) – Overview

HIV-1 Genome and Structure

What is Human Immunodeficiency Virus (HIV)? Classification of HIV Human Immunodeficiency Virus (HIV) is classified into two primary types: HIV-1 and HIV-2. Both types belong to the Retroviridae family, specifically under the genus Lentivirus. These viruses exhibit significant diversity, which is crucial for understanding their epidemiology, transmission dynamics, and treatment options. Morphology of HIV Virus … Read more

Mycobacterium tuberculosis – Pathogenesis, Virulence, Treatment

Overview of Mtb infection. Mtb enters the human body through the airway where it engages the innate immune system within the alveolar space. Macrophages and dendritic cells ingest the bacteria, recruiting new cells and activating adaptive immunity. Together, the innate and adaptive immune systems collaborate to eradicate the bacteria or restrict its active replication within a granuloma. Active tuberculosis occurs either after primary infection or after reactivation due to immunodeficiency, leading to symptomatic disease and transmission to a new host to start a new infection cycle.

Classification of Mycobacterium tuberculosis The genus Mycobacterium comprises over 70 species, several of which are pathogenic to humans. The most notable among these is Mycobacterium tuberculosis, the bacterium responsible for tuberculosis (TB). Understanding the classification of M. tuberculosis and its related species is crucial for medical research and public health. Culture of Mycobacterium tuberculosis The … Read more

Osmosis – Definition, Types, Mechanism, Significance, Examples

Osmosis - Definition, Types, Mechanism, Significance, Examples

What is Osmosis? Definition of Osmosis Osmosis is the spontaneous movement of solvent molecules, typically water, through a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration, aiming to equalize solute concentrations on both sides. How Does Osmosis Work? Osmosis is a fundamental process that facilitates the … Read more

Factors That Affects Enzyme Activity

Factors That Affects Enzyme Activity

What is Enzyme? Factors That Affects Enzyme Activity Enzyme activity, a crucial aspect of biological processes, is influenced by several key factors that dictate the rate and efficiency of enzymatic reactions. Understanding these factors is vital for comprehending the intricacies of enzyme functioning. Let us delve into the six main factors that affect enzyme activity: … Read more

Collagen – Definition, Structure, Types, Functions

Collagen - Definition, Structure, Types, Functions

What is Collagen? Definition of Collagen Collagen is the most abundant protein in the body, providing structural support to connective tissues such as skin, bones, tendons, and ligaments. It consists of a triple helix of amino acids, forming a framework that maintains the integrity and elasticity of various tissues. Collagen plays crucial roles in wound … Read more

Classification of Protein On the Basis of Structure, Composition, Functions

Classification of Protein On the Basis of Structure, Composition, Functions

What is Protein? Classification of protein On the Basis of Structure 1. Fibrous protein Fibrous proteins are a distinct category of proteins characterized by their elongated or fiber-like structure. These proteins are primarily found in animals and play specific roles in structural support. Therefore, understanding their nature, structure, and function is essential for a comprehensive … Read more

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