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.
What is Molecule? A molecule is a fundamental unit in the realm of chemistry, representing a group of two or more atoms bound together by chemical bonds. These bonds arise due to interactions between the electrons of the participating atoms. Delving deeper into the nature and significance of molecules: In essence, molecules are the building … Read more
What are Ketone Bodies? Definition of Ketone Bodies Ketone bodies are water-soluble molecules produced by the liver during periods of low glucose availability, serving as alternative energy substrates for various tissues. The primary ketone bodies include acetoacetate, beta-hydroxybutyrate, and acetone. Structure of Ketone Bodies For detailed visual representations of these structures, you may refer to … Read more
What is Glycoprotein? Definition of Glycoprotein A glycoprotein is a complex molecule composed of a protein covalently bonded to one or more carbohydrate chains, playing diverse roles in biological processes and cell-to-cell interactions. Glycoprotein Structure Methods used to study glycoproteins Glycoproteins, with their intricate structures and multifaceted roles in biological systems, necessitate advanced methodologies for … Read more
What is Gibberellin? Definition of Gibberellin Gibberellin is a class of diterpenoid plant hormones that regulate various developmental processes, including stem elongation, germination, flowering, and dormancy. Structure of Gibberellin Biosynthesis of Gibberellin Gibberellins, a class of plant hormones, play a pivotal role in various growth and developmental processes. The intricate pathway leading to the synthesis … Read more
What is Feedback Inhibition? Definition of Feedback Inhibition Feedback inhibition is a cellular regulatory mechanism in which the end product of a biochemical pathway inhibits the activity of the first enzyme in that pathway, preventing overproduction of the end product. Enzymes, Substrates, and Products Process of Feedback Inhibition Feedback inhibition, a cardinal regulatory mechanism within … Read more
What is Fatty Acid? Location of Fatty Acid Synthesis Fatty Acid Synthesis Pathway Fatty acid synthesis proceeds through a series of steps, each involving specific enzymatic reactions and the utilization of various substrates. The pathway can be summarized as follows: It is important to note that palmitate can undergo further modifications, such as desaturation or … Read more
What is Amino Acid Formula? Amino Acid Formula Structure Amino acids are essential building blocks of proteins, and understanding their molecular structure is crucial in comprehending the functioning of biological systems. The amino acid formula and structure provide valuable insights into the composition and properties of these fundamental units. The molecular formula of an amino … Read more
What is Zwitterion? Zwitterion Definition A zwitterion is a molecule that contains both positively and negatively charged functional groups, resulting in an overall neutral charge. Properties of Zwitterion Zwitterions exhibit several distinct properties due to their unique structure and combination of positively and negatively charged ions. Here are some key properties of zwitterions: Zwitterion Structure … Read more
What is Sphingolipid? Definition of Sphingolipid Sphingolipids are a class of lipids that contain sphingoid bases, such as sphingosine, and play important roles in cell signaling and recognition. Structure of Sphingolipid Types of Sphingolipid Sphingolipids are a diverse class of lipids that play important roles in cellular structure and signaling. They can be classified into … Read more
What is Active Site of an Enzyme? Definition of Enzyme’s Active Site The active site of an enzyme is a small region within the enzyme where substrate molecules bind and undergo a chemical reaction, leading to the formation of products. What is Binding site? Features that Determine Active Site Specificity The specificity of the active … Read more