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Course: AP®︎/College Biology > Unit 2. Lesson 8: Cell compartmentalization and its origins. Prokaryotic and eukaryotic cells. Intro to eukaryotic cells. Endomembrane system. The endomembrane system. Endosymbiosis theory. Mitochondria and chloroplasts. Prokaryotes and eukaryotes review.
Course: Middle school biology > Unit 1. Lesson 2: Cell parts and functions. Cell parts and their functions. Comparing animal and plant cells.
Structure and function of the plasma membrane and cytoplasm of cells. Also covers the phospholipid bilayer and microvilli.
Cells are the most basic unit of life. All cells have a membrane that separates them from the outside world. Although cells are small, they are not simple. Cells contain different components, such as the cytoplasm, ribosomes, and genetic information in the form of DNA.
Here are some ways that mitochondrial and chloroplast DNA differ from the DNA found in the nucleus: High copy number. A mitochondrion or chloroplast has multiple copies of its DNA, and a typical cell has many mitochondria (and, in the case of a plant cell, chloroplasts).
Overview: Eukaryotic gene regulation. Transcription factors. Regulation after transcription. Gene regulation in eukaryotes.
An introduction to cells, including the history of their discovery and the development of cell theory.
Learn about mitosis, the process of cell division, and its significance in biology on Khan Academy.
Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.