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Biotechnology Study Guide

Structured notes for BSc and MSc Biotechnology students covering molecular biology, genetics, microbiology, biochemistry, bioprocessing, genetic engineering, bioinformatics, and industrial and agricultural biotech applications.

Subject Areas​

AreaWhat It Covers
Molecular BiologyDNA structure, replication, transcription, translation, gene expression
GeneticsMendelian genetics, mutations, linkage, population genetics, genomics
MicrobiologyBacteria, viruses, fungi, sterilization, culture techniques, industrial microbiology
BiochemistryMetabolism, enzymes, proteins, carbohydrates, lipids, energy pathways
Genetic EngineeringRecombinant DNA, cloning vectors, PCR, CRISPR, gene therapy
BioprocessingBioreactor design, fermentation, downstream processing, scale-up
BioinformaticsSequence alignment, BLAST, protein structure prediction, genomics tools
Plant BiotechnologyTissue culture, transgenic plants, crop improvement, biofuels
Animal BiotechnologyTransgenic animals, cell culture, reproductive biotech, veterinary biotech

Frequently Asked Questions​

What is the central dogma of molecular biology? The central dogma describes the flow of genetic information: DNA is transcribed into RNA, and RNA is translated into protein. Modern biology has expanded this to include reverse transcription (RNA → DNA in retroviruses) and RNA-only pathways.

What is the difference between transformation and transfection? Transformation refers to the uptake of exogenous DNA by bacteria. Transfection is the introduction of nucleic acids into eukaryotic cells using chemical methods, electroporation, or viral vectors. Both are core tools in genetic engineering.

What is CRISPR-Cas9? CRISPR-Cas9 is a gene-editing technology derived from a bacterial immune system. It uses a guide RNA to direct the Cas9 enzyme to a specific DNA sequence, where it cuts the DNA. Researchers can then knock out a gene, correct a mutation, or insert new sequences.

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