교과서 질문
Cyclohexane, C6H12, is an important starting material used in the industrial synthesis of nylon. Each carbon has four covalent bonds, two to hydrogen and two to other carbons. Draw the structural formula of cyclohexane.
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Ch.23 - Organic and Biological Chemistry
McMurry8th EditionChemistryISBN: 9781292336145
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TOC.tableOfContents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
23장, 문제 131
The DNA from sea urchins contains about 32% A and about 18% G. What percentages of T and C would you expect in sea urchin DNA? Explain.
검증된 단계별 안내1
Step 1: Understand the base pairing rules in DNA. Adenine (A) pairs with Thymine (T), and Guanine (G) pairs with Cytosine (C). This means the percentage of A should equal the percentage of T, and the percentage of G should equal the percentage of C.
Step 2: Given that the DNA contains 32% A, use the base pairing rule to determine the percentage of T. Since A pairs with T, the percentage of T should also be 32%.
Step 3: Calculate the total percentage of A and T in the DNA. Since both A and T are 32%, add these percentages together: 32% + 32% = 64%.
Step 4: Determine the remaining percentage of the DNA that is composed of G and C. Since the total percentage of all bases in DNA must equal 100%, subtract the percentage of A and T from 100%: 100% - 64% = 36%.
Step 5: Use the base pairing rule to find the percentage of C. Given that G is 18%, and G pairs with C, the percentage of C should also be 18%. Verify that the sum of G and C equals the remaining percentage: 18% + 18% = 36%.
주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Chargaff's Rules
Chargaff's Rules state that in a double-stranded DNA molecule, the amount of adenine (A) is equal to thymine (T), and the amount of guanine (G) is equal to cytosine (C). This means that the percentages of A and T, as well as G and C, must be equal in a given DNA sample, which is crucial for understanding the base pairing in DNA.
추천 영상:
가이드 코스
00:28
Solubility Rules
Base Pairing in DNA
Base pairing in DNA refers to the specific pairing of nitrogenous bases: adenine pairs with thymine, and guanine pairs with cytosine. This complementary nature of base pairing is fundamental to the structure of DNA and is essential for processes such as DNA replication and transcription.
추천 영상:
가이드 코스
01:30Conjugate Acid-Base Pairs
Percentage Composition of DNA Bases
The percentage composition of DNA bases provides insight into the relative amounts of each base present in a DNA sample. By knowing the percentages of A and G, one can calculate the percentages of T and C using Chargaff's Rules, allowing for a complete understanding of the DNA's base composition.
추천 영상:
가이드 코스
04:19Matter Composition