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Questions and Answers
What is the main function of the plasma membrane in a cell?
What are the components of a modern cell biologist's toolkit for understanding cells?
Which aspect of the cell does the study of molecular biology focus on?
What is the primary role of the smallest unit of life, the cell?
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What does the study of cell biology encompass?
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What distinguishes the inside of the cell from the nonliving world?
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What is responsible for making faithful copies of the DNA code?
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What is the molecule that serves as the common energy 'currency' in many living cells?
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What is responsible for reading mRNA into protein?
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Which process permits a choice to express or repress a gene by converting the DNA code into RNA?
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In which type of reactions are endergonic reactions involved?
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What stores the code of life?
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What are intermediates of information transfer?
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What are reactions that liberate energy and increase disorder?
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What allows development of treatments for cancer, diabetes, infectious diseases, and cystic fibrosis?
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Study Notes
Cell Biology Basics
- The primary role of the smallest unit of life, the cell, is to maintain homeostasis and sustain life.
- The main function of the plasma membrane in a cell is to separate the internal environment from the external environment.
Tools of the Cell Biologist
- A modern cell biologist's toolkit for understanding cells includes various components.
Focus of Molecular Biology
- The study of molecular biology focuses on the molecular structure and function of cells.
Scope of Cell Biology
- The study of cell biology encompasses the structure, function, and behavior of cells.
Defining Characteristics of Cells
- The inside of the cell is distinguished from the nonliving world by the presence of organelles and biomolecules.
DNA Replication
- The enzyme responsible for making faithful copies of the DNA code is DNA polymerase.
Energy Currency
- The molecule that serves as the common energy 'currency' in many living cells is ATP (adenosine triphosphate).
Protein Synthesis
- Ribosomes are responsible for reading mRNA into protein.
Gene Expression
- The process that permits a choice to express or repress a gene by converting the DNA code into RNA is transcription.
Endergonic Reactions
- Endergonic reactions are involved in anabolic reactions.
Storage of Genetic Information
- The molecule that stores the code of life is DNA (deoxyribonucleic acid).
Information Transfer
- mRNA, tRNA, and rRNA are intermediates of information transfer.
Exergonic Reactions
- Exergonic reactions are reactions that liberate energy and increase disorder.
Medical Applications
- Understanding cell biology allows for the development of treatments for diseases such as cancer, diabetes, infectious diseases, and cystic fibrosis.
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Description
Test your understanding of the introduction to cell biology from chapters 1 to 3 of the seventh edition of Molecular Biology of the Cell. Explore the molecular composition, subcellular structure, cell differentiation, communication, and replication.
