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Questions and Answers
What is the primary function of the nucleus in a cell?
What is the primary function of the nucleus in a cell?
The nucleus acts as the control center of the cell, housing DNA and coordinating cellular activities.
How do plant cells differ from animal cells?
How do plant cells differ from animal cells?
Plant cells have a cell wall, chloroplasts, and a large vacuole, whereas animal cells do not have these structures.
What role do mitochondria play in a cell?
What role do mitochondria play in a cell?
Mitochondria are known as the powerhouse of the cell, responsible for producing energy through aerobic respiration.
What is the significance of plasmids in bacterial cells?
What is the significance of plasmids in bacterial cells?
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Describe the function of ribosomes in a cell.
Describe the function of ribosomes in a cell.
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What is the process of cell division?
What is the process of cell division?
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What makes specialized cells different from regular cells?
What makes specialized cells different from regular cells?
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What are the basic levels of organization in a multicellular organism?
What are the basic levels of organization in a multicellular organism?
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Flashcards
What is the function of the nucleus in a cell?
What is the function of the nucleus in a cell?
The control center of a cell, containing DNA and coordinating cell activities.
What is the role of mitochondria in a cell?
What is the role of mitochondria in a cell?
The powerhouse of the cell, responsible for producing energy through aerobic respiration.
What is the function of the cell membrane?
What is the function of the cell membrane?
It regulates the movement of substances in and out of the cell, acting as the outer boundary.
What is cytoplasm and what happens in it?
What is cytoplasm and what happens in it?
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What is the role of ribosomes in a cell?
What is the role of ribosomes in a cell?
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What is the cell wall and what is it made of?
What is the cell wall and what is it made of?
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What is the role of chloroplasts in a plant cell?
What is the role of chloroplasts in a plant cell?
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What are ciliated cells and their function?
What are ciliated cells and their function?
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Study Notes
Cells: The Basic Unit of Life
- A cell is the fundamental building block of life.
- Cells are the basic components of complex organisms.
Animal Cell Structure
- Nucleus: Control center, contains DNA, coordinates cell activities
- Mitochondria: Powerhouse, responsible for aerobic respiration (energy production)
- Cell Membrane: Regulates substance passage, acts as an outer boundary
- Cytoplasm: Jelly-like substance, houses organelles, site of chemical reactions
- Ribosomes: Synthesize proteins, essential for cell function
Plant Cell Structure
- All animal cell structures are present in plant cells.
- Unique plant cell structures:
- Cell Wall: Cellulose, structural support, strength, and protection
- Chloroplasts: Contain chlorophyll, perform photosynthesis (light energy to food)
- Vacuole: Filled with cell sap, storage, supports cell shape
Bacterial Cell Structure
- Similarities to Animal Cells: Contains cytoplasm, cell membrane, ribosomes
- Differences from Animal and Plant Cells:
- Circular DNA: Single, circular chromosome
- Plasmids: Small, circular DNA molecules, exchanged between bacteria, allowing for genetic information sharing
Cell Division
- New cells are created by existing cells dividing.
- Process: A single cell divides into two, the two into four, and so on.
Organization of a Multicellular Organism
- Cells: The most basic unit.
- Tissues: Groups of similar cells working together.
- Organs: Composed of different tissues working together for a specific task.
- Organ Systems: Groups of organs working together for major body functions.
- Multicellular Organisms: Formed by combination of all these levels.
Specialized Cells
- Ciliated cells: Cilia (hair-like structures) move mucus in trachea and bronchi, clearing airways.
- Root hair cells: Found in plant roots, increase water and mineral absorption.
- Palisade mesophyll cells: Located in plant leaves, chloroplasts for photosynthesis.
- Neurons: Nerve cells, transmit electrical impulses throughout the body.
- Red blood cells: Hemoglobin, transport oxygen throughout the body.
- Sperm and egg cells (gametes): Reproductive cells, combine to form an embryo.
Magnification
- Magnification: Ratio of image size to actual object size.
- Formula: Magnification = Image size / Actual size
- Units: Must be consistent, typically millimeters.
- Unit Conversions:
- mm to µm: multiply by 1000
- µm to mm: divide by 1000
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Description
Explore the fundamental structures of animal and plant cells in this quiz. Learn about the roles of the nucleus, mitochondria, chloroplasts, and more. Test your knowledge on cell components and their functions.