Cell Theory : OCR AS Level

  • Created by: Aleena
  • Created on: 22-10-18 13:11
What is Cell Theory?
Consists of 3 statements: 1)all organisms are composed of one or more cells 2) cells are the basic unit of structure & function in organisms 3) all cells come only from other cells
1 of 11
cells that have a nucleus-include plants,animals + fungi
2 of 11
Structures found within cells that have a particular function + are responsible for life processes- some are membrane-bound but not all
3 of 11
Largest Organelle & Function?
Nucleus-contains Chromatin (DNA & Protein),stores genetic material & consists of nucleolus & is surrounded by a nuclear envelope (double membrane) with nuclear pores.
4 of 11
role of nucleolus?
makes RNA & ribosomes for protein synthesis in cytoplasm
5 of 11
What is the Plasma cell surface Membrane?
composed of a phospholipid bilayer and controls the entry and exit of molecules into and out of the cell
6 of 11
V.small organelles without membranes, found in cytoplasm/attached to Rough ER & consists of 2 sub-units. Role: synthesis proteins from mRNA using amino acids
7 of 11
spherical/sausage shaped things, surround by a double membrane-the internal membrane fold into cristae(folds). Role: site of ATP production aka cellular respiration
8 of 11
Rough & Smooth Endoplasmic Reticulum (ER)?
series of flattened membrane-bound sacs called Cisternae. Rough ER is coated with ribosomes & transports proteins made by ribosomes. Smooth ER lacks ribosomes & makes lipids
9 of 11
Golgi Apparatus?
Stack of membrane- bound flattened sacs. role: receives proteins from rough ER + modifies them e.g. adding a sugar molecule. Then packages the protein into vesicles for transport
10 of 11
Spherical sacs surrounded by single membrane like vesicles
11 of 11

Other cards in this set

Card 2




cells that have a nucleus-include plants,animals + fungi

Card 3




Preview of the front of card 3

Card 4


Largest Organelle & Function?


Preview of the front of card 4

Card 5


role of nucleolus?


Preview of the front of card 5
View more cards


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Biological molecules resources »