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Questions and Answers
What is the primary function of the cell membrane?
What is the primary function of the cell membrane?
- Contains genetic material
- Provides support for the cell
- Allows food to enter and wastes to exit the cell (correct)
- Helps in cell division
Which structure is responsible for providing support in plant cells?
Which structure is responsible for providing support in plant cells?
- Cell Membrane
- Chloroplast
- Centrosome
- Cell Wall (correct)
What gives chloroplasts their green color?
What gives chloroplasts their green color?
- Xanthophyll
- Cellulite
- Chlorophyll (correct)
- Carotenoids
What role do centrosomes and centrioles play in the cell?
What role do centrosomes and centrioles play in the cell?
Which structure would not be found in an animal cell?
Which structure would not be found in an animal cell?
What is the primary function of ribosomes in a cell?
What is the primary function of ribosomes in a cell?
Which organelle is known as the powerhouse of the cell?
Which organelle is known as the powerhouse of the cell?
What is the role of the nucleus in a cell?
What is the role of the nucleus in a cell?
What is the function of vacuoles in a cell?
What is the function of vacuoles in a cell?
Lysosomes are often referred to as:
Lysosomes are often referred to as:
Which statement accurately describes the cell theory?
Which statement accurately describes the cell theory?
Who is credited with discovering cells in 1665?
Who is credited with discovering cells in 1665?
What conclusion did Matthias Schleiden draw about plants?
What conclusion did Matthias Schleiden draw about plants?
Which scientist proposed that all new cells come only from existing cells?
Which scientist proposed that all new cells come only from existing cells?
Which of the following statements is incorrect regarding the basic unit of living things?
Which of the following statements is incorrect regarding the basic unit of living things?
Who discovered the cell nucleus?
Who discovered the cell nucleus?
Which scientist is known for finding mitochondria in muscle cells?
Which scientist is known for finding mitochondria in muscle cells?
What did Julius von Sachs show regarding chlorophyll?
What did Julius von Sachs show regarding chlorophyll?
Who described ribosomes as cell organelles?
Who described ribosomes as cell organelles?
Which scientist made contributions to the study of mitochondria?
Which scientist made contributions to the study of mitochondria?
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Study Notes
Cell Theory
- All living things are made up of one or more cells.
- Cells are the basic unit of living things.
- All cells come from existing cells.
The Men Behind the Cell Theory
- Robert Hooke discovered cells in 1665.
- Matthias Schleiden concluded in 1838 that all plants are made up of cells.
- Theodore Schwann stated that all animals are made of cells.
- Rudolf Virchow stated that all new cells come only from already existing cells.
Cell Structures
- Cell Membrane: Allows food to enter the cell and wastes to exit.
- Cell Wall (Plant Cell): Provides support for the cell.
- Chloroplast: Contains chlorophyll, giving it a green color.
- Centrosome and Centriole: Help in cell division.
Organelles
- Endoplasmic Reticulum: Helps make proteins and other substances; acts as a transportation network within the cell.
- Nucleus: The control center of the cell, directs its activity.
- Vacuole: Serves as a storage tank for food and water.
- Ribosome: The site of protein synthesis in the cell.
- Mitochondria: Known as the "powerhouse" of the cell.
- Lysosome: Contains chemicals that break down harmful molecules and recycle worn-out cell parts; often called the "suicide bag" of the cell.
- Cytoplasm: The fluid substance found between the nucleus and the cell membrane.
Scientists and Their Discoveries
- Robert Brown discovered the cell nucleus.
- Albrecht von Kolliker found mitochondria in muscle cells.
- Julius von Sachs demonstrated that chlorophyll is located in chloroplasts.
- George Palade described ribosomes.
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