Textbook Question
How many chromosomes are present in a human cell?
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Ch.26 Nucleic Acids and Protein Synthesis
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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Table of contents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Not the one you use?Change textbook
Chapter 26, Problem 28
What is the difference between a gene and a chromosome?
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A gene is a specific sequence of DNA that contains the instructions for making a particular protein or RNA molecule. It is the functional unit of heredity.
A chromosome is a larger structure made of DNA and proteins that organizes and packages genetic material within the nucleus of a cell. Chromosomes contain many genes along their length.
Genes are located on chromosomes, and each chromosome can carry hundreds to thousands of genes depending on its size.
Chromosomes ensure the proper distribution of genetic material during cell division, while genes are responsible for coding the traits and functions of an organism.
In summary, a gene is a smaller, functional unit of DNA, whereas a chromosome is a larger structure that houses and organizes multiple genes.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Gene
A gene is a specific sequence of nucleotides in DNA that encodes instructions for building proteins or RNA molecules. Genes are the fundamental units of heredity and play a crucial role in determining an organism's traits. Each gene can vary in length and can be expressed in different ways, influencing various biological functions.
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Chromosome
A chromosome is a long, thread-like structure made of DNA and proteins that contains many genes. Chromosomes are found in the nucleus of eukaryotic cells and are crucial for the organization and regulation of genetic material during cell division. Humans typically have 46 chromosomes, arranged in 23 pairs, which carry the genetic information inherited from both parents.
Relationship between Genes and Chromosomes
Genes and chromosomes are closely related, as genes are located on chromosomes. Each chromosome can contain hundreds to thousands of genes, and the specific arrangement of these genes on chromosomes is essential for proper genetic function and inheritance. Understanding this relationship helps clarify how traits are passed from one generation to the next.
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Related Practice
Textbook Question
What genetic information does a single gene contain?
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Textbook Question
Gln-His-Pro-Gly is the sequence of a molecule known as progenitor thyrotropin-releasing hormone (pro-TRH). If we were searching for pro-TRH genes, we would need to know what sequence of bases in DNA we should be looking for. Use the following boxes to indicate answers to parts (a)–(d).
a. What RNA sequence could code for these four amino acids?
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Textbook Question
Copy the following simplified drawing of a DNA replication fork:
a. On the drawing, indicate the direction of synthesis of the new strand labeled A and the location of DNA polymerase on the strand.
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Textbook Question
Copy the diagram and use dotted lines to indicate where hydrogen bonding occurs between the complementary strands of DNA. What is the sequence of each strand of DNA drawn (remember that the sequence is written from the 5′ to 3′ end)?
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Textbook Question
What are the two major components of chromatin?
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