Domanda del libro di testo
How can gene knockouts, transgenic animals, and gene editing techniques be used to explore gene function?
466
views
Ch. 20 - Recombinant DNA Technology
Klug12th EditionConcepts of GeneticsISBN: 9780135564776
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 - Introduction to Genetics17
- Ch. 2 - Mitosis and Meiosis36
- Ch. 3 - Mendelian Genetics51
- Ch. 4 - Extensions of Mendelian Genetics74
- Ch. 5 - Chromosome Mapping in Eukaryotes51
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages46
- Ch. 7 - Sex Determination and Sex Chromosomes33
- Ch. 8 - Chromosome Mutations: Variation in Number and Arrangement40
- Ch. 9 - Extranuclear Inheritance31
- Ch. 10 - DNA Structure and Analysis43
- Ch. 11 - DNA Replication and Recombination44
- Ch. 12 - DNA Organization in Chromosomes30
- Ch. 13 - The Genetic Code and Transcription54
- Ch. 14 - Translation and Proteins47
- Ch. 15 - Gene Mutation, DNA Repair, and Transposition41
- Ch. 16 - Regulation of Gene Expression in Bacteria29
- Ch. 17 - Transcriptional Regulation in Eukaryotes41
- Ch. 18 - Post-transcriptional Regulation in Eukaryotes33
- Ch. 19 - Epigenetics33
- Ch. 20 - Recombinant DNA Technology44
- Ch. 21 - Genomic Analysis36
- Ch. 22 - Applications of Genetic Engineering and Biotechnology36
- Ch. 23 - Developmental Genetics37
- Ch. 24 - Cancer Genetics34
- Ch. 25 - Quantitative Genetics and Multifactorial Traits54
- Ch. 26 - Population and Evolutionary Genetics45
Klug12th EditionConcepts of GeneticsISBN: 9780135564776Non è quello che usi tu?Cambia libro di testo
Capitolo 20, Problema 1b
What steps make PCR a chain reaction that can produce millions of copies of a specific DNA molecule in a matter of hours without using host cells?
Guida verificata passo dopo passo1
Understand that PCR (Polymerase Chain Reaction) is a method that amplifies a specific DNA segment exponentially by repeatedly cycling through three main steps: denaturation, annealing, and extension.
Step 1: Denaturation - Heat the reaction mixture to around 94-98°C to separate the double-stranded DNA into single strands, providing single-stranded templates for replication.
Step 2: Annealing - Cool the mixture to 50-65°C to allow short DNA primers, which are complementary to the target sequence, to bind (anneal) to their specific sites on the single-stranded DNA templates.
Step 3: Extension - Raise the temperature to about 72°C, the optimal temperature for the DNA polymerase enzyme, which synthesizes new DNA strands by adding nucleotides to the primers, creating new double-stranded DNA molecules.
Repeat these three steps for 20-40 cycles; because each new DNA strand can serve as a template in the next cycle, the amount of target DNA doubles each cycle, resulting in an exponential increase and producing millions of copies in a few hours without the need for host cells.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
2mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Polymerase Chain Reaction (PCR) Process
PCR is a laboratory technique used to amplify specific DNA sequences exponentially. It involves repeated cycles of denaturation, annealing, and extension, which separate DNA strands, allow primers to bind, and synthesize new DNA strands, respectively. This cyclical process enables rapid multiplication of the target DNA.
Video consigliato:
Percorso guidato
08:39
mRNA Processing
Role of DNA Primers
DNA primers are short, single-stranded sequences that are complementary to the target DNA region. They provide a starting point for DNA polymerase to begin synthesis. Primers ensure specificity by binding only to the desired DNA segment, enabling selective amplification during PCR.
Video consigliato:
Percorso guidato
11:59Steps to DNA Replication
Thermostable DNA Polymerase
Thermostable DNA polymerases, like Taq polymerase, can withstand the high temperatures used during PCR denaturation steps. Their heat resistance allows them to remain active throughout the cycles, synthesizing new DNA strands without being denatured, which is essential for the continuous chain reaction.
Video consigliato:
Percorso guidato
01:45DNA Proofreading
Pratica correlata
Domanda del libro di testo
In a recombinant DNA cloning experiment, how can we determine whether DNA fragments of interest have been incorporated into plasmids and, once host cells are transformed, which cells contain recombinant DNA?
561
views
Domanda del libro di testo
Write a short essay or sketch a diagram that provides an overview of how recombinant DNA techniques help geneticists study genes.
528
views
Domanda del libro di testo
How has DNA-sequencing technology evolved in response to the emerging needs of genome scientists?
649
views