Page 22 – Biology Notes Online

Difference Between Prokaryotic and Eukaryotic Cells – Prokaryotic Vs Eukaryotic Cells

• Last Updated June 26, 2025 • 0 revisions • 10 min readby Editorial Team

Difference Between Prokaryotic Cells and Eukaryotic Cells

What is Prokaryotic Cell? What is Eukaryotic Cell? Difference Between Prokaryotic and Eukaryotic Cells Feature Prokaryotic Eukaryotic Nucleus Absent; genetic material located in a nucleoid region. Present; genetic material enclosed within a nuclear envelope. Membrane-bound organelles Generally absent (e.g., mitochondria, chloroplasts, endoplasmic reticulum, Golgi apparatus). Present (e.g., mitochondria, chloroplasts in photosynthetic cells, endoplasmic reticulum, Golgi … Read more

Top 30 Differences Between Bacteria, Archae, and Eukarya

• Published on June 22, 2025 • 12 min readby Editorial Team

Differences Between Bacteria, Archaea, and Eukarya.

What is Bacteria? Bacteria represent a category of microscopic, unicellular organisms that are classified as prokaryotes, characterised by the absence of a membrane-bound nucleus and organelles. These organisms are found in a wide range of habitats across the planet, including extreme environments such as deep-sea vents and arctic ice, as well as more common settings … Read more

20 Difference Between Darkfield and bright Field Microscope

• Last Updated June 26, 2025 • 0 revisions • 4 min readby Editorial Team

What is Bright Field Microscope? What is Dark Field Microscope? Difference Between Bright Field Microscope and Dark Field Microscope Feature Bright‑Field Microscope Dark‑Field Microscope Image Background Bright Dark Specimen Appearance Dark/stained specimens appear visible Unstained specimens appear bright against dark Illumination Transmitted white light through specimen Oblique/scattered light; direct light blocked Contrast Mechanism Light absorption … Read more

What is the Difference Between Holobasidium and Phragmobasidium?

• Published on June 20, 2025 • 7 min readby Editorial Team

What is Holobasidium? What is Basidium? What is Phragmobasidium? Difference Between Holobasidium and Phragmobasidium Holobasidium and Phragmobasidium are two distinct types of basidia, which are reproductive structures found in fungi belonging to the division Basidiomycota. These structures play a crucial role in the life cycle of these fungi, particularly in spore production and dispersal. Understanding … Read more

Difference Between Virus and Viroids – Virus Vs Viroids

• Published on June 20, 2025 • 5 min readby Editorial Team

Difference Between Virus and Viroids In this article we will discuss about Differences Between Viroids and Prions. Virus Viroid Difference Between Virus and Viroids – Virus Vs. Viroids Feature Virus Viroid Genetic Material DNA or RNA, single- or double-stranded, linear or segmented Small circular single-stranded RNA molecule Capsid/Coat Protein coat (capsid); some have additional lipid … Read more

What is Phycology?

• Last Updated July 28, 2025 • 0 revisions • 15 min readby Editorial Team

In some places, phycology is also called algology. It is the study of algae, which are part of the plant kingdom.

Southern Blot vs Western Blot

• Last Updated June 4, 2025 • 0 revisions • 3 min readby Sourav Pan

What is Southern Blot? What is Western Blot? Southern Blot vs Western Blot Here is a detailed comparison between Southern blotting and Western blotting: Feature Southern Blotting Western Blotting Target Molecule DNA Protein Purpose Detection of specific DNA sequences within a complex DNA sample Detection and analysis of specific proteins in a sample Developed By … Read more

Northern Blot vs Southern Blot – Differences Between Northern and Southern blotting

• Published on May 3, 2025 • 5 min readby Editorial Team

Differences Between Northern and Southern blotting - Northern blotting vs Southern blotting

What is Northern blotting? Northern blotting is a technique in molecular biology that allows for the detection of specific RNA sequences in a complex mixture, offering valuable insights into gene expression patterns. In 1977, James Alwine, David Kemp, and George Stark at Stanford University introduced a method that was cleverly named “Northern blot,” referencing … Read more

Southern Blot – Definition, Principle, Steps, Importance

• Last Updated June 28, 2025 • 0 revisions • 22 min readby Editorial Team

Southern Blotting Principle, Procedure, Importance

Southern Blotting is a molecular biology technique used for the identification of a specific DNA sequence in a collected DNA sample.

Three-domain system – Carl Woese’s Classification

• Last Updated May 22, 2025 • 0 revisions • 19 min readby Sourav Pan

Carl Woese’s Classification - Three Domain Classification

All living organisms are grouped into three major categories under the three-domain system, a modern way to classify life based on genetic and evolutionary relationships. Proposed by microbiologist Carl Woese in the 1990s, this system splits life into Bacteria, Archaea, and Eukarya. Bacteria are the familiar single-celled microbes found everywhere, from soil to our bodies, lacking a cell … Read more