Introduction Enzymes and isoenzymes play crucial roles not only in metabolism but also in medical diagnostics and therapy. Enzymes can be utilized as drugs to treat specific diseases, while isoenzymes serve as important biomarkers for the diagnosis of various conditions. This note explores the therapeutic and diagnostic applications of enzymes and isoenzymes in detail. Â Therapeutic … Read more
Introduction Coenzymes are organic non-protein molecules that bind to enzymes and assist in enzyme-catalyzed reactions. They often function as carriers of specific atoms or functional groups during the reaction. Coenzymes are crucial for the proper functioning of many enzymes and play vital roles in various metabolic pathways. Unlike enzymes, coenzymes are not proteins but are … Read more
Introduction The regulation of enzyme activity is critical for maintaining cellular homeostasis and responding to environmental changes. Enzymes are regulated through various mechanisms to ensure that metabolic pathways function efficiently and adaptively. This note covers enzyme induction and repression, as well as the regulation of allosteric enzymes. Â Enzyme Induction and Repression Enzyme Induction The Enzyme … Read more
Enzyme Kinetics Enzyme kinetics is the study of the rates of enzyme-catalyzed reactions. It helps in understanding how enzymes work and how their activity can be modulated. Two important models in enzyme kinetics are the Michaelis-Menten model and the Lineweaver-Burk plot. Â Michaelis-Menten Kinetics The Michaelis-Menten equation describes the rate of enzymatic reactions by relating the … Read more
Introduction Enzymes are biological catalysts that accelerate chemical reactions in living organisms. Most enzymes are proteins, though some RNA molecules can also function as enzymes (ribozymes). They are essential for numerous biochemical processes, including digestion, metabolism, DNA replication, and cellular respiration. Enzymes work by lowering the activation energy of a reaction, thereby increasing the rate … Read more
Translation is the process by which the genetic code carried by messenger RNA (mRNA) is decoded to produce a specific sequence of amino acids in a polypeptide chain, which folds into a functional protein. This process occurs in the cytoplasm of both prokaryotic and eukaryotic cells and involves ribosomes, transfer RNA (tRNA), and various enzymatic … Read more
The genetic code is a set of rules by which the information encoded in genetic material (DNA or RNA sequences) is translated into proteins by living cells. Specifically, the genetic code defines how sequences of nucleotide triplets, called codons, specify which amino acids are added to a growing polypeptide chain during the process of translation. … Read more
Transcription is the process by which genetic information encoded in DNA is copied into messenger RNA (mRNA). This is the first step in gene expression, leading to the synthesis of proteins. Transcription occurs in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells. Here is a detailed note on transcription. Â Key Steps … Read more
DNA replication is a fundamental process by which a cell duplicates its DNA before cell division, ensuring that each daughter cell inherits an identical copy of the DNA. The semi-conservative model of DNA replication is the accepted mechanism by which DNA replication occurs. This model was proposed by Watson and Crick in 1953 and confirmed … Read more
DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are nucleic acids essential for the storage, transmission, and expression of genetic information in all living organisms. Despite their similarities, they have distinct structures and functions. Â Structure of DNA Â Chemical Composition 1. Nucleotides: – Components: Each nucleotide consists of three components: – A nitrogenous base: Adenine … Read more
