3 Questions
What is the smallest unit of life?
Organelle
Which of the following is not a characteristic of cells?
Ability to reproduce
What is the main function of a cell membrane?
Protection
Study Notes
Cellular Biology Basics
- The smallest unit of life is the cell.
- Cells are the basic structural, functional, and biological units of living organisms.
Characteristics of Cells
- Cells exhibit the following characteristics: • Organization: Cells are highly organized systems with cellular organelles that perform specific functions. • Metabolism: Cells carry out a variety of chemical reactions to sustain life. • Homeostasis: Cells maintain a stable internal environment despite changes in the external environment. • Growth and Development: Cells grow, replicate, and specialize to form tissues and organs. • Reproduction: Cells reproduce to form new cells. • Response to Stimuli: Cells respond to changes in their environment. • Evolution: Cells exhibit genetic variation, and their heritable traits are passed on to subsequent generations.
Cell Membrane Functions
- The main function of a cell membrane is to regulate the movement of substances in and out of the cell.
Test your knowledge of cells with this quiz! Learn about the basic unit of life, the main function of cells, and identify different types of cells.
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