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Questions and Answers
What is a defining characteristic of all plants and animals?
What is a defining characteristic of all plants and animals?
What is considered the most basic unit of life?
What is considered the most basic unit of life?
Where are cells found?
Where are cells found?
Which level of biological organization is the most fundamental, analogous to the atom in chemistry?
Which level of biological organization is the most fundamental, analogous to the atom in chemistry?
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Which of the following is a characteristic of all living things based on the content.
Which of the following is a characteristic of all living things based on the content.
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What was the key claim made by Virchow in 1858?
What was the key claim made by Virchow in 1858?
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Which of the following best describes eukaryotic cells?
Which of the following best describes eukaryotic cells?
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Which organisms are primarily composed of eukaryotic cells?
Which organisms are primarily composed of eukaryotic cells?
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What is described as the continuous cytoplasm inside of cells?
What is described as the continuous cytoplasm inside of cells?
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What does 'Omnis cellula e cellula' translate to in English?
What does 'Omnis cellula e cellula' translate to in English?
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What is the function of plasmodesmata in plant cells?
What is the function of plasmodesmata in plant cells?
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In what year did Virchow make his statement regarding cells?
In what year did Virchow make his statement regarding cells?
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Which of the following structures limits the height of certain plants?
Which of the following structures limits the height of certain plants?
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Which structure serves as a thin bridge between neighboring plant cells?
Which structure serves as a thin bridge between neighboring plant cells?
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What is NOT a function of the symplast within plant cells?
What is NOT a function of the symplast within plant cells?
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What unique feature surrounds each plant cell?
What unique feature surrounds each plant cell?
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What provides structural reinforcement to plants, allowing them to grow vertically?
What provides structural reinforcement to plants, allowing them to grow vertically?
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How do plant and animal cells primarily differ regarding their structure?
How do plant and animal cells primarily differ regarding their structure?
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What type of evolution contributed to the structural reinforcement in plants?
What type of evolution contributed to the structural reinforcement in plants?
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Which statement best describes the function of the cell wall in plants?
Which statement best describes the function of the cell wall in plants?
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What are the primary components of cell membranes?
What are the primary components of cell membranes?
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Which of the following functions is performed by membranes in a plant cell?
Which of the following functions is performed by membranes in a plant cell?
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Which of these substances is not a primary component of cell membranes?
Which of these substances is not a primary component of cell membranes?
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In addition to fatty acids, what else is primarily found in cell membranes?
In addition to fatty acids, what else is primarily found in cell membranes?
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What are membranes in plant cells primarily made of?
What are membranes in plant cells primarily made of?
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What is the main function of cytosol in a cell?
What is the main function of cytosol in a cell?
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Which of the following statements accurately describes the role of intrinsic proteins?
Which of the following statements accurately describes the role of intrinsic proteins?
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What does the cytosol contain that is essential for cellular processes?
What does the cytosol contain that is essential for cellular processes?
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Which of these components is NOT typically associated with the cytosol?
Which of these components is NOT typically associated with the cytosol?
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Which of the following best describes the cytosol?
Which of the following best describes the cytosol?
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Flashcards
Cell
Cell
The smallest unit of life, found in all plants and animals, and capable of independent function.
Multicellular
Multicellular
Organisms made up of many cells working together.
Single-celled
Single-celled
Organisms consisting of only one cell.
Cell Theory
Cell Theory
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Independent Function
Independent Function
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Omnis cellula e cellula
Omnis cellula e cellula
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1858
1858
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Eukaryotic cells
Eukaryotic cells
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Eukaryotic cells
Eukaryotic cells
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Cell Wall
Cell Wall
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Lignification
Lignification
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Structural Reinforcement
Structural Reinforcement
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Plant vs Animal Cells
Plant vs Animal Cells
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Evolution of Plants
Evolution of Plants
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Symplast
Symplast
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Plasmodesmata
Plasmodesmata
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Limited Growth
Limited Growth
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Cell Membrane
Cell Membrane
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Organelles
Organelles
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Membranes
Membranes
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What does the cell membrane do?
What does the cell membrane do?
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Why do cells have different membranes?
Why do cells have different membranes?
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Intrinsic Proteins
Intrinsic Proteins
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Cytosol
Cytosol
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Transport of Vital Substances
Transport of Vital Substances
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Classes of Intrinsic Proteins
Classes of Intrinsic Proteins
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Metabolic Reactions
Metabolic Reactions
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Study Notes
Plant Cell Structure and Function
- Plant cells are composed of protoplasm and a cell membrane
- Biologists identify two main cell types: prokaryotic (simple, no nucleus) and eukaryotic (with a nucleus)
- Plant cells are eukaryotic, containing a nucleus and other organelles
- Plant cells have a rigid cell wall primarily composed of cellulose microfibrils, polysaccharides, and lignin.
- The cell wall provides structural support and prevents excessive water uptake
- Secondary cell walls are thicker and stronger than primary walls, contributing to the strength and toughness.
- Lignin is a key component of secondary cell walls.
- Plasma membrane is a semi-permeable barrier surrounding the cytoplasm
- The membrane is primarily composed of lipids (fatty acids) and proteins
- There are two types of membrane proteins: extrinsic (loosely attached) and intrinsic (firmly embedded)
- Membrane lipids are phospholipids and sterols (like cholesterol)
- The membranes have an amphiphilic property, meaning they can interact with both water and fat
- Membranes are actively involved in metabolism and contain a higher proportion of protein
- Membranes perform critical tasks, such as dividing the cell into compartments and regulating molecule passage.
- Membranes can grow and fuse
- The cell wall helps maintain cell shape and prevents overexpansion
Plant Cell Components
- Cell Wall: Provides structural support and protection, and prevents the plant cell from rupturing. Primarily composed of cellulose.
- Cytoplasm: Contains all organelles and the jelly-like cytosol.
- Chloroplasts: Site of photosynthesis; contain chlorophyll for capturing light energy.
- Vacuoles: Fluid-filled sacs that store water, nutrients, and waste products, and helps maintain turgor pressure.
- Mitochondria: Site of cellular respiration, generating energy (ATP).
- Lysosomes: Involved in the breakdown and recycling of cellular waste materials. Peroxisomes break down fatty acids and other molecules.
- Endoplasmic Reticulum (ER): Rough ER (with ribosomes) processes proteins; Smooth ER (without ribosomes) synthesizes lipids.
- Golgi Apparatus: Processes and packages proteins and lipids.
- Nucleus: Contains the cell's genetic material (DNA), controls cellular activities
- Ribosomes: Involved in protein synthesis.
Cell Wall Details
- Plant cells have a rigid cell wall that differs from animal cells
- Two types of walls:
- Primary Cell Walls: Thin, characteristic of young growing cells
- Secondary Cell Walls: Thicker, stronger, formed when cell growth has ended
- Cell walls are critical for plant development and their ability to grow vertically.
- Cell wall cementing prevents migration of cells
- Cell walls play a role in cell division, expansion and in communication amongst plant cells.
Cytoplasm and Cytosol
- Cytoplasm includes the cytosol (the fluid component) and all the organelles
- The inner part called endoplasm
- The outer part called ectoplasm
- Cytosol is the matrix for all metabolic reactions of the cell.
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Description
Explore the intricacies of plant cell structure and function in this quiz. Test your understanding of cell types, components like the cell wall, and the functions of various organelles. Perfect for students studying biology or plant sciences.