B1.1 Flashcards
What is the first principle of cell theory
All living things are made up of one or more cells, living things are unicellular or multicellular
What is the second principle of cell theory
Cells are the most basic unit of structure and function, cells contain many components
What is the third principle of cell theory
All cells are created by pre existing cells, so cells cannot just appear from no where, new cells are created by the process of mitosis, which is cell division
Who created cell theory
Robert Hooke
Who was the first person to recognise cells
Robert Hooke
How did Robert Hooke recognise cells
In cork he saw that using his microscope there were empty spaces between the cell walls of the cork
What type of cell includes animal, plant, yeasts, fungi and Algis
Eukaryotic
What do prokaryotic cells include
Bacteria
What do prokaryotic and eukaryotic cells have in common
They both have cell membranes, cytoplasm and DNA
Eukaryotic cells have …
Membrane bound organelles, such as mitochondria.
Where is DNA kept in eukaryotic cells
Contained within the nucleus
The DNA is bound to proteins known as histones and together they form a chromatin
In prokaryotic cells the DNA…
Floats freely in the cytoplasm, or is found as small circular molecules known as plasmids, and is not associated with proteins
