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What is the Cell Theory?
What is the Cell Theory?
Which are the three main principles of the Cell Theory?
Which are the three main principles of the Cell Theory?
Who first observed and named "cells" in cork tissue?
Who first observed and named "cells" in cork tissue?
Robert Hooke
Who observed living cells, including bacteria, using a simple microscope?
Who observed living cells, including bacteria, using a simple microscope?
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Who proposed that plants and animals are made of cells?
Who proposed that plants and animals are made of cells?
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Who stated that all cells come from pre-existing cells?
Who stated that all cells come from pre-existing cells?
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What is the function of the plasma membrane?
What is the function of the plasma membrane?
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What is the function of the cytoplasm?
What is the function of the cytoplasm?
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What is the function of the nucleus?
What is the function of the nucleus?
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What are the functions of Mitochondria?
What are the functions of Mitochondria?
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What are the functions of Endoplasmic Reticulum (ER)?
What are the functions of Endoplasmic Reticulum (ER)?
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What is the function of the Golgi Apparatus?
What is the function of the Golgi Apparatus?
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What is the function of lysosomes?
What is the function of lysosomes?
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What is the function of chloroplasts? (in plant cells)
What is the function of chloroplasts? (in plant cells)
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What is the function of vacuoles?
What is the function of vacuoles?
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What is the function of the cytoskeleton?
What is the function of the cytoskeleton?
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What is a prokaryotic cell?
What is a prokaryotic cell?
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Prokaryotic cells are larger in size than eukaryotic cells.
Prokaryotic cells are larger in size than eukaryotic cells.
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Prokaryotic cells have a true nucleus
Prokaryotic cells have a true nucleus
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Prokaryotic cells have membrane-bound organelles.
Prokaryotic cells have membrane-bound organelles.
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Eukaryotic cells reproduce through binary fission.
Eukaryotic cells reproduce through binary fission.
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What are some examples of prokaryotic cells?
What are some examples of prokaryotic cells?
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What are somatic cells?
What are somatic cells?
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What are germ cells?
What are germ cells?
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What is the function of red blood cells (RBCs)?
What is the function of red blood cells (RBCs)?
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What is the function of neurons?
What is the function of neurons?
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What is the function of muscle cells?
What is the function of muscle cells?
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What is the function of plant cells (e.g., guard cells)?
What is the function of plant cells (e.g., guard cells)?
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What is the function of microvilli?
What is the function of microvilli?
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What is the function of cilia and flagella?
What is the function of cilia and flagella?
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What is the function of pseudopodia?
What is the function of pseudopodia?
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What is the function of cell wall thickening in plants?
What is the function of cell wall thickening in plants?
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What is the function of plasmodesmata?
What is the function of plasmodesmata?
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What is the function of storage vacuoles in plants?
What is the function of storage vacuoles in plants?
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What is keratinization?
What is keratinization?
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Flashcards
Cell Theory
Cell Theory
The fundamental concept that states all living organisms are composed of cells, cells are the smallest unit of life, and all cells arise from pre-existing cells.
Robert Hooke
Robert Hooke
The scientist who first observed and named 'cells' in cork tissue in 1665.
Anton van Leeuwenhoek
Anton van Leeuwenhoek
The scientist who observed living cells, including bacteria, using a simple microscope.
Matthias Schleiden
Matthias Schleiden
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Theodor Schwann
Theodor Schwann
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Rudolf Virchow
Rudolf Virchow
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Plasma Membrane
Plasma Membrane
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Cytoplasm
Cytoplasm
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Nucleus
Nucleus
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Mitochondria
Mitochondria
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Endoplasmic Reticulum (ER)
Endoplasmic Reticulum (ER)
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Golgi Apparatus
Golgi Apparatus
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Lysosomes
Lysosomes
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Ribosomes
Ribosomes
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Chloroplasts
Chloroplasts
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Vacuoles
Vacuoles
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Cytoskeleton
Cytoskeleton
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Prokaryotic Cells
Prokaryotic Cells
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Eukaryotic Cells
Eukaryotic Cells
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Somatic Cells
Somatic Cells
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Germ Cells
Germ Cells
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Microvilli
Microvilli
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Cilia and Flagella
Cilia and Flagella
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Pseudopodia
Pseudopodia
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Cell Wall Thickening
Cell Wall Thickening
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Plasmodesmata
Plasmodesmata
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Keratinization
Keratinization
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Endospores
Endospores
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Study Notes
General Biology 1 - Quarter 1, Module 1: Cells
- General Biology 1, Quarter 1, Module 1: Cells - by Raffy R. Padrigano, LPT
Lesson 1: Cell Theory
- Cell Theory: A foundational concept in biology, describing the properties of cells.
- Cell Theory Principles:
- All living organisms are composed of cells. Cells are the basic units of life.
- The cell is the smallest unit of life; it is the basic structural and functional unit in living organisms.
- All cells arise from pre-existing cells via cell division (e.g., mitosis or binary fission).
Contributions to Cell Theory
- Robert Hooke (1665): First observed and named "cells" in cork tissue.
- Anton van Leeuwenhoek: Observed living cells, including bacteria, using a simple microscope.
- Matthias Schleiden and Theodor Schwann (1839): Proposed that plants and animals are made of cells.
- Rudolf Virchow (1855): Stated that all cells come from pre-existing cells (Omnis cellula e cellula).
Lesson 2: Cell Structure and Functions
- Cells are comprised of distinct parts with specific roles, ensuring efficient functioning.
- Cell Structures and Functions:
- Plasma Membrane: A semi-permeable barrier made of a lipid bilayer; controls substance movement in and out of the cell.
- Cytoplasm: Jelly-like substance filling the cell; includes organelles.
- Nucleus: Houses genetic material (DNA), regulating cellular activities like growth, metabolism, and reproduction.
Organelles in Eukaryotic Cells
- Mitochondria: The cell's powerhouse; site of ATP (energy) production.
- Endoplasmic Reticulum (ER):
- Rough ER: Studded with ribosomes; synthesizes proteins.
- Smooth ER: Synthesizes lipids and detoxifies substances.
- Golgi Apparatus: Modifies, packages, and transports proteins and lipids.
- Lysosomes: Contain enzymes for digestion and waste removal.
- Ribosomes: Synthesize proteins.
- Chloroplasts (plant cells only): Site of photosynthesis.
- Vacuoles (plant cells primarily): Store water, nutrients, and waste (large in plants).
- Cytoskeleton: Provides structural support and facilitates movement.
Lesson 3: Prokaryotic vs. Eukaryotic Cells
-
Prokaryotic Cell: A simple, unicellular organism lacking a true nucleus and membrane-bound organelles. Genetic material is in a nucleoid region; examples are bacteria and archaea.
-
Eukaryotic Cell: A complex cell with a true nucleus enclosed by a nuclear membrane and membrane-bound organelles; found in multicellular and some unicellular organisms like plants, animals, fungi, and protists
-
Prokaryotic vs. Eukaryotic Cells (Summary):
Feature Prokaryotic Cells Eukaryotic Cells Size Small (1-10 µm) Larger (10-100 µm) Nucleus Absent Present DNA Circular, in nucleoid Linear, in nucleus Organelles No membrane-bound Membrane-bound Examples Bacteria, Archaea Plants, animals, fungi, protists Reproduction Binary fission Mitosis and meiosis
Lesson 4: Cell Types
- Cells are categorized based on organism types and functions.
- Based on Organisms:
- Prokaryotic Cells: Found in bacteria and archaea.
- Eukaryotic Cells: Found in plants, animals, fungi, and protists.
- Based on Function:
- Somatic Cells: Body cells (e.g., skin, muscle).
- Germ Cells: Reproductive cells (e.g., sperm, egg).
- Specialized Cells:
- Red Blood Cells (RBCs): Transport oxygen.
- Neurons: Transmit signals in the nervous system.
- Muscle Cells: Responsible for movement.
- Plant Cells (e.g., Guard Cells): Regulate gas exchange.
Lesson 5: Cell Modifications
- Cells adapt their structures to carry out specific functions.
- In Animals:
- Microvilli: Increase surface area for absorption.
- Cilia and Flagella: Aid in movement.
- Pseudopodia: Extensions of the cytoplasm for movement and engulfing food.
- In Plants:
- Cell Wall Thickening: Provides strength and protection.
- Plasmodesmata: Channels for transport and communication.
- Storage Vacuoles: Store nutrients, waste, or water. Keratinization, formation of Endospores
- In Animals:
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Description
Explore the fundamental concepts of cell theory and its historical contributions in this quiz based on General Biology 1, Quarter 1, Module 1. Learn about the properties of cells, their role as the basic units of life, and key figures like Robert Hooke and Rudolf Virchow who shaped our understanding of cells.