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Biotechnology
YGK These Techniques in Biotechnology
| Question | Answer |
|---|---|
| Technique used to amplify small segments of DNA | PCR (polymerase chain reaction) |
| Inventor of PCR in 1983 | Kary Mullis |
| Instrument used for PCR cycles | Thermal cycler |
| Three steps of PCR | Denaturation, annealing, and extension |
| Heat-stable DNA polymerase used in PCR | Taq polymerase |
| Bacterial source of Taq polymerase | Thermus aquaticus |
| PCR variant used to measure RNA by converting it to cDNA | RT-PCR (reverse transcription PCR) |
| Technique to separate molecules by size and charge | Gel electrophoresis |
| Gels used as matrices in electrophoresis | Agarose or polyacrylamide |
| Buffers used to maintain pH and conduction in electrophoresis | TAE and TBE |
| Stain used to visualize nucleic acids in a gel | Ethidium bromide |
| Stain used to visualize proteins in a gel | Coomassie brilliant blue |
| Standard set of molecules with known sizes | Ladder |
| Electrophoresis variant using SDS to give proteins a negative charge | SDS-PAGE |
| Process of determining the exact order of nucleotides | DNA sequencing |
| Sequencing method using chain-terminating ddNTPs | Sanger sequencing |
| Sequencing method that reassembles overlapping random fragments | Shotgun sequencing |
| UK-based company using nanopore sequencing | Oxford Nanopore Technologies |
| Blotting technique used to detect RNA | Northern blot |
| Blotting technique used to detect proteins | Western blot |
| Blotting technique used to detect DNA | Southern blot |
| Inventor of the Southern blot | Edwin Southern |
| Membranes used for protein blotting | Nitrocellulose or PVDF |
| Antibodies used in Western blotting | Primary and secondary antibodies |
| Assay based on antigen-antibody interaction and color change | ELISA |
| Most popular type of ELISA | Sandwich ELISA |
| Genome-editing technology derived from bacterial immune systems | CRISPR/Cas9 |
| Winners of the 2020 Nobel Prize for CRISPR discovery | Jennifer Doudna and Emmanuelle Charpentier |
| The two key components of CRISPR/Cas9 | Cas9 enzyme and guide RNA (gRNA) |
| Repair mechanism that joins DNA ends and often introduces mutations | Non-homologous end joining (NHEJ) |
| Repair mechanism that uses a template to insert new DNA sequences | Homology-directed repair (HDR) |
| Gene targeted by He Jiankui in 2018 for HIV resistance | CCR5 |
| Analyzing cell characteristics in a stream via laser | Flow cytometry |
| Light scatter used to determine cell size in flow cytometry | Forward-scatter (FSC) |
| Light scatter used to determine cell granularity | Side-scatter (SSC) |
| Techniques ensuring cells pass through a laser in single file | Hydrodynamic or acoustic focusing |
| Flow cytometry used to sort cells based on fluorescence | FACS (Fluorescence-activated cell sorting) |
| Process of creating multiple copies of a specific DNA segment | Molecular cloning |
| Circular DNA molecule often used as a vector in cloning | Plasmid |
| Enzymes used to cut DNA at specific sequences | Restriction enzymes |
| Enzyme that joins DNA fragments and vectors together | DNA ligase |
| Introduction of a recombinant vector into a host cell | Transformation |
| Feature added to vectors to ensure only transformed cells grow | Antibacterial resistance gene |