Domanda del libro di testo
Identify each of the following bases as a pyrimidine or a purine:
a. cytosine
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Ch.17 Nucleic Acids and Protein Synthesis
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353
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TOC.tableOfContents
- Ch.1 Chemistry in Our Lives11
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy54
- Ch.4 Atoms and Elements51
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions41
- Ch.8 Gases29
- Ch.9 Solutions51
- Ch.10 Acids and Bases and Equilibrium65
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons78
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones83
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides90
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis83
- Ch.18 Metabolic Pathways and ATP Production67
Timberlake13th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9780134421353Non è quello che usi tu?Cambia libro di testo
Capitolo 17, Problema 90b
Suppose a mutation occurs in the DNA section in problem 17.89, and the first base in the parent chain, adenine, is replaced by guanine.
b. Using the new strand that results from this mutation, write the order of bases in the altered mRNA.
Guida verificata passo dopo passo1
Identify the original DNA sequence from problem 17.89 and note the specific base sequence in the parent chain before the mutation.
Understand the mutation: The problem states that adenine (A) in the parent chain is replaced by guanine (G). Modify the DNA sequence accordingly to reflect this change.
Recall the base-pairing rules for DNA to RNA transcription: In RNA, adenine (A) pairs with uracil (U), thymine (T) pairs with adenine (A), cytosine (C) pairs with guanine (G), and guanine (G) pairs with cytosine (C).
Using the altered DNA strand (after the mutation), transcribe the sequence into mRNA by replacing each DNA base with its complementary RNA base according to the base-pairing rules.
Write out the final sequence of the altered mRNA strand, ensuring that the mutation is reflected in the sequence.
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DNA Mutation
A DNA mutation is a change in the nucleotide sequence of an organism's DNA. This can occur due to various factors, including environmental influences or errors during DNA replication. In this case, the mutation involves the substitution of adenine (A) with guanine (G), which can lead to changes in the resulting protein if it occurs in a coding region.
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Percorso guidato
5:08
Steps of DNA Replication Concept 1
Transcription
Transcription is the process by which the genetic information in DNA is copied into messenger RNA (mRNA). During transcription, RNA polymerase reads the DNA template strand and synthesizes a complementary RNA strand. The order of bases in the mRNA is determined by the sequence of the DNA template, meaning that any mutations in the DNA will directly affect the mRNA sequence produced.
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Percorso guidato
6:37Transcription: mRNA Synthesis Concept 1
Base Pairing Rules
Base pairing rules dictate how nucleotides pair in DNA and RNA. In DNA, adenine pairs with thymine (A-T) and guanine pairs with cytosine (G-C). However, during transcription, adenine pairs with uracil (A-U) in RNA. Understanding these rules is essential for determining the sequence of mRNA that results from a mutated DNA strand, as they guide the correct pairing of bases.
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Percorso guidato
2:01Base Pairing Concept 2
Pratica correlata
Domanda del libro di testo
Suppose a mutation occurs in the DNA section in problem 17.89, and the first base in the parent chain, adenine, is replaced by guanine.
a. What type of mutation has occurred?
676
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Domanda del libro di testo
Answer the following questions for the given section of DNA:
b. Using the new strand as a template, write the mRNA sequence.
529
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Domanda del libro di testo
Suppose a mutation occurs in the DNA section in problem 17.89, and the first base in the parent chain, adenine, is replaced by guanine.
d. What effect, if any, might this mutation have on the structure and/or function of the resulting protein?
708
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Domanda del libro di testo
Answer the following questions for the given section of DNA:
c. Write the three-letter symbols for the amino acids that would go into the peptide from the mRNA you wrote in part b.
477
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Domanda del libro di testo
Suppose a mutation occurs in the DNA section in problem 17.89, and the first base in the parent chain, adenine, is replaced by guanine.
c. Write the three-letter symbols for the amino acids that would go into the peptide from the mRNA you wrote in part b.
698
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