You are viewing a free preview of this lesson.
Subscribe to unlock all 3 lessons in this course and every other course on LearningBro.
Cells are the basic structural and functional units of all living organisms. A-Level Biology requires a thorough understanding of cell ultrastructure, the differences between prokaryotic and eukaryotic cells, microscopy techniques, the mechanisms of cell division, and the roles of stem cells and their relevance to cancer.
Key Definition: A cell is the smallest unit of life that can carry out all life processes. All living organisms are composed of one or more cells.
Eukaryotic cells possess a true nucleus enclosed by a double membrane (nuclear envelope) and a range of membrane-bound organelles. Each organelle is a compartment that provides a specialised internal environment for particular metabolic reactions.
Subscribe to continue reading
Get full access to this lesson and all 3 lessons in this course.