Avatar for Sourav Pan

Sourav Pan

Founder of Biology Notes Online, Biology & Microbiology Educator, M.Sc. in Microbiology
Expertise
Microbiology, Immunology, Cell Biology, Molecular Biology, Genetics, Biotechnology, Biochemistry, Botany, Zoology
Education
University of Calcutta
Profile Last Updated: August 10, 2026

Sourav Pan is the founder and sole author of Biology Notes Online. He holds a Bachelor of Science (B.Sc.) degree and an M.Sc. in Microbiology from the University of Calcutta. He creates educational resources covering microbiology, immunology, biotechnology, genetics, cell biology, botany, zoology, and other life-science subjects.

His goal is to make complex biological concepts easier to understand through well-structured, student-friendly articles based on academic textbooks, peer-reviewed research, and authoritative scientific sources. In addition to writing new content, he regularly reviews and updates articles to improve their accuracy, clarity, and educational value.

DNA Sequencing – Definition, Principle, Steps, Types, Applications

DNA Sequencing - Definition, Principle, Steps, Types, Applications

What is DNA Sequencing? Definition of DNA Sequencing DNA sequencing refers to the techniques used to determine the order of the nucleotide bases adenine, guanine, cytosine, and thymine within a DNA molecule. Methods of DNA Sequencing DNA sequencing is a crucial technique used in various fields of biological research, allowing scientists to unravel the genetic … Read more

DNA Microarray Principle, Types and Steps involved in cDNA microarrays

DNA Microarray Principle, Types and Steps involved in cDNA microarrays

The DNA microarray technology is among the most effective technology that can offer an extremely high-throughput and precise overview of the whole transcriptome and genome, which lets scientists understand the molecular processes that underlie natural and malfunctioning biological processes. Microarray technology may accelerate the process of screening thousands of protein and DNA samples at once.

Restriction Fragment Length Polymorphism (RFLP)

Restriction Fragment Length Polymorphism (RFLP)

What is Restriction Fragment Length Polymorphism (RFLP)? Principle of Restriction Fragment Length Polymorphism (RFLP) Restriction Fragment Length Polymorphism (RFLP) is a powerful technique used in molecular biology to analyze genetic variations and identify differences in DNA sequences. This technique relies on the principle that the DNA fragments generated by the digestion of DNA with specific … Read more

Vector – Definition, Examples, Characteristics, Types, Applications, Limitations

DNA Polymerase - Definition, Mechanism, Structure, Types

What is a vector in biology? Vector Definition A vector is a DNA molecule or genetic material used to transfer specific genetic information between cells in molecular biology and genetic engineering. Characteristics Features of vectors The following outlines the key features and functions of vectors, providing insights into their design and effectiveness. Types of vectors … Read more

DNA Polymerase – Definition, Mechanism, Structure, Types

DNA Polymerase - Definition, Mechanism, Structure, Types

What is DNA Polymerase? DNA polymerases Definition DNA polymerases are enzymes that catalyze the synthesis of DNA molecules from nucleoside triphosphates, playing a crucial role in DNA replication and repair across all living organisms. Properties of DNA Polymerase DNA polymerases possess several important properties that contribute to their role in DNA replication. These properties ensure … Read more

Next-Generation Sequencing (NGS)- Definition, Types, Applications, Limitations

Next-Generation Sequencing (NGS)- Definition, Types, Applications, Limitations

What is Next-Generation Sequencing (NGS)? Next-Generation Sequencing (NGS), also known as high-throughput sequencing, has revolutionized the field of genomics and molecular biology by allowing the sequencing of thousands to millions of DNA molecules simultaneously. It encompasses a range of different sequencing technologies, all aimed at producing large amounts of sequence data at a lower cost … Read more

DNA Ladders – Definition, Types, Uses

What is DNA Ladder? Definition of DNA Ladder A DNA ladder is a solution containing DNA molecules of known lengths that are used as a reference to estimate the size of unknown DNA fragments separated through gel electrophoresis. Characteristics of DNA Ladder DNA ladders used for electrophoresis possess several important characteristics to ensure their effectiveness … Read more

Nucleotide Biosynthesis Pathways – Salvage pathway and De novo synthesis

Nucleotide Biosynthesis Pathways - Salvage pathway and De novo synthesis

What is a Nucleotide? A nucleotide is a fundamental component of nucleic acids, such as DNA and RNA. It is composed of three main parts: a pentose sugar, a nitrogenous base, and a phosphate group. Nucleotides are often referred to as the building blocks of DNA due to their crucial role in forming the DNA … Read more

Primer – Definition, Primer Design, Types, Online Tools, Uses

Primer - Definition, Primer Design, Types, Online Tools, Uses

What is Primer? Types of Primers There are two main types of primers: DNA primers and RNA primers. DNA primers are commonly used in vitro, specifically for PCR amplification and DNA sequencing. On the other hand, RNA primers are utilized in in vivo processes like DNA replication and cloning. 1. DNA Primers: 2. RNA Primers: … Read more