Domanda del libro di testo
Hershey and Chase selected the bacteriophage T2 for their experiment assessing the role of DNA in heredity because T2 contains protein and DNA, but not RNA. Explain why T2 was a good choice for this experiment.
516
views
Ch. 7 - DNA Structure and Replication
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 - The Molecular Basis of Heredity, Variation, and Evolution64
- Ch. 2 - Transmission Genetics144
- Ch. 3 - Cell Division and Chromosome Heredity81
- Ch. 4 - Gene Interaction87
- Ch. 5 - Genetic Linkage and Mapping in Eukaryotes103
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages73
- Ch. 7 - DNA Structure and Replication71
- Ch. 8 - Molecular Biology of Transcription and RNA Processing79
- Ch. 9 - The Molecular Biology of Translation110
- Ch. 10 - Eukaryotic Chromosome Abnormalities and Molecular Organization100
- Ch. 11 - Gene Mutation, DNA Repair, and Homologous Recombination86
- Ch. 12 - Regulation of Gene Expression in Bacteria and Bacteriophage90
- Ch. 13 - Regulation of Gene Expression in Eukaryotes38
- Ch. 14 - Analysis of Gene Function via Forward Genetics and Reverse Genetics72
- Ch. 15 - Recombinant DNA Technology and Its Applications69
- Ch. 16 - Genomics: Genetics from a Whole-Genome Perspective49
- Ch. 17 - Organelle Inheritance and the Evolution of Organelle Genomes27
- Ch. 18 - Developmental Genetics43
- Ch. 19 - Genetic Analysis of Quantitative Traits66
- Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels105
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172Non è quello che usi tu?Cambia libro di testo
Capitolo 7, Problema 4
Explain how the Hershey and Chase experiment identified DNA as the hereditary molecule.
Guida verificata passo dopo passo1
The Hershey and Chase experiment used bacteriophages, which are viruses that infect bacteria, to determine whether DNA or protein was the genetic material.
They labeled the DNA of the phages with radioactive phosphorus-32 (\(^{32}\text{P}\)) and the protein coat with radioactive sulfur-35 (\(^{35}\text{S}\)), as DNA contains phosphorus but not sulfur, and proteins contain sulfur but not phosphorus.
The labeled phages were allowed to infect bacteria, and then a blender was used to separate the phage coats from the bacterial cells.
After centrifugation, the bacteria formed a pellet at the bottom of the tube, while the phage coats remained in the supernatant.
They found that the radioactive phosphorus (\(^{32}\text{P}\)) was inside the bacterial cells, indicating that DNA was the material injected by the phages into the bacteria, while the radioactive sulfur (\(^{35}\text{S}\)) remained in the supernatant, indicating that proteins were not the genetic material.
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:
4mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Hershey and Chase Experiment
The Hershey and Chase experiment, conducted in 1952, utilized bacteriophages (viruses that infect bacteria) to determine whether DNA or protein was the genetic material. They labeled the DNA with radioactive phosphorus and the protein with radioactive sulfur, then tracked which component entered the bacterial cells. The results showed that only the DNA entered the cells, indicating that DNA is the hereditary molecule.
Video consigliato:
Percorso guidato
08:06
Mendel's Experiments
Bacteriophages
Bacteriophages, or phages, are viruses that specifically infect bacteria. They consist of a protein coat and genetic material, which can be either DNA or RNA. In the Hershey and Chase experiment, phages were used as a model to study the transfer of genetic information, providing a clear system to distinguish between DNA and protein as the hereditary substance.
Video consigliato:
Percorso guidato
06:04Mapping Bacteriophages
Radioactive Labeling
Radioactive labeling is a technique used to trace the movement of molecules in biological experiments. In the Hershey and Chase experiment, the researchers used radioactive isotopes to label DNA and protein separately. This allowed them to track which component was responsible for carrying genetic information into the bacterial cells, ultimately demonstrating that DNA, not protein, was the hereditary material.
Video consigliato:
Percorso guidato
02:34Plant HOX genes
Pratica correlata
Domanda del libro di testo
Explain why Avery, MacLeod, and McCarty's in vitro transformation experiment showed that DNA, but not RNA or protein, is the hereditary molecule.
1047
views
Domanda del libro di testo
What results from the experiments of Frederick Griffith provided the strongest support for his conclusion that a transformation factor is responsible for heredity?
728
views
Domanda del libro di testo
One strand of a fragment of duplex DNA has the sequence 5'-ATCGACCTGATC-3'.
What is the sequence of the other strand in the duplex?
642
views
Domanda del libro di testo
One strand of a fragment of duplex DNA has the sequence 5'-ATCGACCTGATC-3'.
What is the name of the bond that joins one nucleotide to another in the DNA strand?
610
views
Domanda del libro di testo
One strand of a fragment of duplex DNA has the sequence 5'-ATCGACCTGATC-3'.
Is the bond in part (b) a covalent or a noncovalent bond?
408
views