Domanda del libro di testo
What evidence did Watson and Crick have at their disposal in 1953? What was their approach in arriving at the structure of DNA?
879
views
Ch. 9 - DNA Structure and Analysis
Klug10th EditionEssentials of GeneticsISBN: 9780135588789
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 - Introduction to Genetics16
- Ch. 2 - Mitosis and Meiosis28
- Ch. 3 - Mendelian Genetics37
- Ch. 4 - Modification of Mendelian Ratios53
- Ch. 5 - Sex Determination and Sex Chromosomes32
- Ch. 6 - Chromosome Mutations: Variation in Number and Arrangement37
- Ch. 7 - Linkage and Chromosome Mapping in Eukaryotes36
- Ch. 8 - Genetic Analysis and Mapping in Bacteria and Bacteriophages24
- Ch. 9 - DNA Structure and Analysis38
- Ch. 10 - DNA Replication29
- Ch. 11 - Chromosome Structure and DNA Sequence Organization22
- Ch. 12 - The Genetic Code and Transcription36
- Ch. 13 - Translation and Proteins27
- Ch. 14 - Gene Mutation, DNA Repair, and Transposition34
- Ch. 15 - Regulation of Gene Expression in Bacteria22
- Ch. 16 - Regulation of Gene Expression in Eukaryotes37
- Ch. 17 - Recombinant DNA Technology27
- Ch. 18 - Genomics, Bioinformatics, and Proteomics30
- Ch. 19 - The Genetics of Cancer21
- Ch. 20 - Quantitative Genetics and Multifactorial Traits37
- Ch. 21 - Population and Evolutionary Genetics45
Klug10th EditionEssentials of GeneticsISBN: 9780135588789Non è quello che usi tu?Cambia libro di testo
Capitolo 9, Problema 12
Adenine may also be named 6-amino purine. How would you name the other four nitrogenous bases, using this alternative system? (O is indicated by 'oxy-,' and CH₃ by 'methyl.')
Guida verificata passo dopo passo1
Understand that adenine is named 6-amino purine because it has an amino group (–NH₂) attached to the 6th carbon of the purine ring. This naming system focuses on the functional groups attached to the purine or pyrimidine ring.
Identify the base type for each nitrogenous base: guanine and adenine are purines (two-ring structures), while cytosine, thymine, and uracil are pyrimidines (single-ring structures).
For guanine, note that it has an amino group at position 2 and an oxygen (oxo group) at position 6 on the purine ring. Using the alternative system, name it as 2-amino-6-oxy purine.
For cytosine, which is a pyrimidine, it has an amino group at position 4 and an oxygen at position 2. Name it as 4-amino-2-oxy pyrimidine.
For thymine and uracil, both are pyrimidines with oxygen atoms at positions 2 and 4. Thymine has an additional methyl group at position 5. Name uracil as 2,4-dioxy pyrimidine and thymine as 5-methyl-2,4-dioxy pyrimidine.
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:
3mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Nitrogenous Base Structure and Classification
Nitrogenous bases are organic molecules that form the building blocks of nucleic acids. They are classified into purines (adenine and guanine) with a double-ring structure, and pyrimidines (cytosine, thymine, uracil) with a single-ring. Understanding their chemical structure is essential for systematic naming based on functional groups.
Video consigliato:
Percorso guidato
06:25
DNA Structure
Functional Group Nomenclature in Nitrogenous Bases
The alternative naming system uses functional groups like amino (-NH2), oxy (=O), and methyl (-CH3) to describe nitrogenous bases. For example, adenine is 6-amino purine, indicating an amino group at position 6 on the purine ring. Recognizing these groups and their positions allows systematic naming of other bases.
Video consigliato:
Percorso guidato
08:26Functional Genomics
Position Numbering in Purine and Pyrimidine Rings
Purine and pyrimidine rings have standardized numbering systems to identify the location of substituents. For purines, numbering starts at the nitrogen in the six-membered ring, while for pyrimidines, numbering begins at the nitrogen in the ring. Correct numbering is crucial for accurately naming functional groups on the bases.
Video consigliato:
Percorso guidato
07:Positional Cloning
Pratica correlata
Domanda del libro di testo
What are the exceptions to the general rule that DNA is the genetic material in all organisms? What evidence supports these exceptions?
883
views
Domanda del libro di testo
How are the carbon and nitrogen atoms of the sugars, purines, and pyrimidines numbered?
794
views
Domanda del libro di testo
Draw the chemical structure of a dinucleotide composed of A and G. Opposite this structure, draw the dinucleotide composed of T and C in an antiparallel (or upside-down) fashion. Form the possible hydrogen bonds.
1002
views
Domanda del libro di testo
Draw the chemical structure of the three components of a nucleotide, and then link the three together. What atoms are removed from the structures when the linkages are formed?
857
views
Domanda del libro di testo
Describe the various characteristics of the Watson–Crick double-helix model for DNA.
763
views