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Questions and Answers
What does cell theory state about cells?
What does cell theory state about cells?
- Cells can spontaneously generate under certain conditions.
- Cells make up all living things and come from preexisting cells. (correct)
- Cells are only found in multicellular organisms.
- Cells perform functions only in animal organisms.
What is a group of similar cells that work together called?
What is a group of similar cells that work together called?
- Organelle
- Tissue (correct)
- Organ
- System
What is the primary role of the cell membrane?
What is the primary role of the cell membrane?
- To regulate what comes in and goes out of the cell. (correct)
- To provide energy to the cell.
- To store genetic information.
- To protect the cell against external damage.
Which structure contains a cell's DNA?
Which structure contains a cell's DNA?
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What is a flagellum used for?
What is a flagellum used for?
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Study Notes
Cell Theory
- States that all living things are composed of cells.
- Cells arise from preexisting cells.
- Cells perform essential functions necessary for life.
Tissues
- Defined as a group of similar cells working collaboratively.
- Function together to carry out specific tasks in an organism.
Organs
- Composed of multiple tissue types working in unison.
- Each organ has a specialized role contributing to the organism's overall function.
Organelles
- Membrane-bound structures found in eukaryotic cells.
- Perform specialized functions vital for cell operation (e.g., energy production, waste processing).
Cell Membrane
- Encloses all types of cells.
- Regulates the movement of substances in and out of the cell.
Cell Wall
- Present in certain cells, offering a rigid structure.
- Provides protection and support, commonly found in plant cells and some bacteria.
Capsule
- A protective, slimy layer surrounding some bacteria.
- Shields bacteria from harmful substances and helps retain moisture.
Cytoplasm
- The jelly-like substance within a cell, exclusive of the nucleus.
- Contains organelles and is the site for many cellular processes.
Flagellum
- A whip-like appendage allowing some cells to move in their environment.
- Facilitates mobility in certain bacteria and single-celled organisms.
DNA
- Contains genetic information essential for protein synthesis.
- Plays a crucial role in regulating various cellular functions.
Chromosome
- Consists of tightly coiled DNA within the cell.
- Carries the genetic blueprint necessary for inheritance and cellular activities.
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