5 Questions
According to the cell theory, what are the main ideas regarding cells?
All living organisms are composed of cells
True or False: Cells are the smallest units of life.
True
What process produces ATP in the mitochondria?
cellular respiration
_______ synthesizes proteins, while smooth ER synthesizes lipids.
Rough ER
Match the cell organelles with their functions:
Nucleus = Contains genetic material, controls cell activities Mitochondria = Powerhouse of the cell, produces ATP through cellular respiration Endoplasmic Reticulum (ER) = Rough ER synthesizes proteins, smooth ER synthesizes lipids Golgi Apparatus = Modifies, sorts, and packages proteins and lipids for secretion Lysosomes = Digests waste materials and cellular debris Ribosomes = Site of protein synthesis Cytoplasm = Gel-like substance where organelles are suspended and many cellular processes occur
Study Notes
The Cell Theory
- All living organisms, from unicellular bacteria to multicellular organisms, are composed of cells, which are the basic structural and functional units of life.
- Cells are the smallest units of life, exhibiting characteristics such as metabolism, growth, reproduction, and response to stimuli.
Hierarchy of Cells to Organism
- The hierarchy of cells to organism is: cells -> tissues -> organs -> organ systems -> organism.
Cell Organelles and Their Functions
- Nucleus: contains genetic material (DNA) and controls cell activities.
- Mitochondria: produces ATP through cellular respiration, serving as the powerhouse of the cell.
- Endoplasmic Reticulum (ER): rough ER synthesizes proteins, while smooth ER synthesizes lipids.
- Golgi Apparatus: modifies, sorts, and packages proteins and lipids for secretion.
- Lysosomes: digests waste materials and cellular debris.
- Ribosomes: site of protein synthesis.
- Cytoplasm: a gel-like substance where organelles are suspended and many cellular processes occur.
Key Concept
- Cells arise from pre-existing cells, refuting the earlier idea of spontaneous generation.
Understand the fundamental principle of biology that explains the properties and functions of cells, including their composition and characteristics.
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