Certification Course in Molecular Biology

Explore genetic regulation using the lac operon as a bacterial model, detailing negative repression by the repressor, induction by allolactose, and positive regulation by Cap and cAMP.

Explore the scopes of molecular biology, including genetic information, DNA replication, gene expression, and protein structure and function, and their expanding applications in recombinant DNA technology, genomics, and biomedicine.

Explore how molecular biology drives genetic engineering, biotechnology, and medicine across diverse fields. Apply insights into agriculture, forensic science, pharmacogenomics, vaccines, and environmental monitoring.

Define biomolecules as large biological macromolecules classified into carbohydrates, lipids, proteins, and nucleic acids, each supporting energy, structure, membranes, catalysis, and genetic information.

Carbohydrates are organic compounds of carbon, hydrogen, and oxygen that provide energy and support cell structure. Monosaccharides, disaccharides, and polysaccharides form diverse carbohydrates with dietary roles and health implications.

Carbohydrates provide energy as glucose, store as glycogen, regulate blood sugar, spare protein, support gut health and brain function, and contribute to immune signaling and hormonal regulation.

Explore how Fischer projection converts 3D molecules into a 2D diagram to depict stereochemistry of sugars and other chiral compounds, including bond rules, chiral centers, D/L configuration, and enantiomers.

Explore the Haworth projection as a two-dimensional view of cyclic monosaccharides and their anomeric forms, alpha and beta. Learn hemiacetal and hemiketal formation in sugar cyclization.

Explore alpha and beta anomeric forms and pyranose and furanose rings of alpha d glucopyranose and alpha d ribofuranose as they form via cyclization, including chair conformation and hemiacetal formation.

Classify carbohydrates into monosaccharides, disaccharides, oligosaccharides, and polysaccharides with examples glucose, fructose, galactose, sucrose, lactose, starch, glycogen, and cellulose; explain glycosidic bonds and ribose/deoxyribose roles in rna and dna.

Disaccharides are simple sugars made of two monosaccharides linked by a glycosidic bond, including sucrose, lactose, and maltose, and serve as energy sources with roles in digestion, sweetness, and fermentation.

Explore oligosaccharides, small carbohydrate chains of 3–10 sugars, including raffinose and stachyose, their plant storage and osmotic roles, fermentation by gut microbiota, and presence in beans, onions, and dairy.

Explore the classification of lipids into simple, conjugated, and derived lipids, detailing simple lipids like triglycerides and waxes, their ester linkages, energy storage roles, and natural sources.

Discover phospholipids, a key class of conjugated lipids with amphipathic structure that forms cell membranes and supports signaling and energy storage, with applications in emulsifiers and liposome drug delivery.

Explore derived lipids from simple lipids via hydrolysis, focusing on steroid structure, cholesterol roles in membranes, and steroid hormones like cortisol, estrogen, and testosterone.

Explore proteins as large, complex molecules built from amino acids, synthesized by ribosomes and encoded by DNA, with side chains shaping properties and structures guiding enzymes, transport, and signaling.

Proteins perform a wide range of vital functions, including enzymatic catalysis, structural support, transport, signaling, muscle contraction, gene regulation, and immune defense.

Certification course in molecular biology explains the structures and functions of essential and non-essential amino acids, including roles in protein synthesis, muscle repair, metabolism, immune function, and neurotransmitter precursors.

Explore protein secondary structure, including alpha helices and beta sheets stabilized by backbone hydrogen bonds, plus beta turns, loops, and random coils that influence folding and function.

Explore the tertiary structure of proteins, detailing how a polypeptide folds into a three-dimensional shape stabilized by hydrophobic interactions, non-polar interior clustering, hydrogen bonds, ionic bonds, and disulfide bridges.

Explore nucleic acids, including DNA and RNA, their nucleotide monomers, and the roles of DNA in storing genetic information and RNA in protein synthesis and regulation.

Explore the DNA structure, including the sugar-phosphate backbone, deoxyribose, nucleotides, and complementary base pairing of A–T and C–G, as antiparallel strands form a double helix with major and minor groups.

Explore the three dna forms—bdna, edna, and z-dna—and learn how hydration and protein interactions shape their right- or left-handed structures, base-pair turns, and grooves.

Explore RNA structure, including nucleotides, ribose, phosphate backbone, and base pairing, and see how single-stranded RNA folds into secondary structures to regulate gene expression and protein synthesis.

Explore ribozymes and their catalytic activity as RNA folds into complex secondary and tertiary structures through complementary base pairing, forming hairpin loops, stem loops, and pseudoknots that support RNA function.

Explore the three main RNA types—mRNA, tRNA, and rRNA—and study mRNA cap and tail, tRNA cloverleaf and anticodon, and ribosome structure in prokaryotes and eukaryotes.

Demonstrates semiconservative DNA replication by tracing nitrogen-15 to nitrogen-14 across generations with density gradient centrifugation, revealing hybrid and fully new DNA bands.

Initiate DNA replication by recognizing origins of replication and assembling the origin recognition complex, then unwind DNA with helicase to form replication forks; primase lays primers for DNA polymerase.

Explore the replication fork, leading and lagging strands, and Okazaki fragments, and learn how antiparallel, bidirectional replication uses polymerase III or polymerase epsilon or delta and DNA ligase for completion.

Terminate DNA replication by converging forks and sealing Okazaki fragments with ligase, yielding two identical DNA molecules. In bacteria forks terminate at tor sites, while eukaryotes use topoisomerases.

Explore the diverse DNA polymerases across prokaryotes and eukaryotes, from DNA polymerase I to DNA polymerase epsilon, detailing replication, repair, proofreading, and RNA primer removal.

Learn how DNA polymerase proofreading activity detects and corrects mismatched nucleotides during replication via 3' to 5' exonuclease, ensuring accurate base pairing and DNA integrity.

Explore how base excision repair removes damaged bases and replaces them to prevent mutations. Track the steps from glycosylase recognition to ligase sealing, preserving genomic integrity.

Learn the nucleotide excision repair pathway that recognizes UV-induced thymine dimers, unwinds DNA, excises a 24 to 32 nucleotide segment, fills gaps with polymerase, and ligates to restore genome integrity.

Explore the bacterial S.O.S. repair mechanism as a rapid DNA damage response, detailing RecA activation, LexA cleavage, SOS gene induction, and TLS by Pol IV and Pol V.

Explore transcription initiation in prokaryotes and eukaryotes, detailing promoter recognition, RNA polymerase binding, and initiation complex formation, including sigma factor and Tata box roles.

Master transcription elongation as RNA polymerase moves along the DNA template from 3' to 5' and synthesizes RNA in the 5' to 3' direction, with DNA unwinding ahead until termination.

Learn transcription termination in prokaryotes via Rho independent termination and Rho dependent termination, including hairpin loops, uracil runs, and Rho helicase driven release; in eukaryotes, termination involves cleavage and polyadenylation.

Explore Rho dependent termination in prokaryotes, where Rho binds RNA, moves along it, unwinds RNA–DNA hybrid, and dissociates RNA polymerase; contrast with eukaryotic termination via polyadenylation, cleavage, and polymerase dissociation.

Explore RNA polymerase types and functions in prokaryotes and eukaryotes, including core enzymes, sigma factors, promoter recognition, and Pol I, II, and III in transcription.

Learn the essentials of RNA processing in eukaryotes, including five-prime capping, splicing of introns and exons, and polyadenylation, to produce stable, export-ready mRNA.

Explore translation, codons, and the wobble hypothesis, outlining how mRNA decodes into proteins at the ribosome with start and stop signals, redundancy, and tRNA flexibility.

Explore prokaryotic translation initiation: ribosome assembly on mRNA with Shine-Dalgarno alignment, IFs and GTP, initiator tRNA carrying formyl methionine, and 70S formation.

Explains translation elongation, where the ribosome moves along mRNA, delivers aminoacyl tRNAs to the a-site, forms peptide bonds, and translocates through a-site, p-site, and e-site with elongation factors.