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
Eukaryotes?
cells that have a nucleus-include plants,animals + fungi
2 of 11
Organelles?
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
Ribosomes?
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
Mitochondria?
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
Lysosomes?
Spherical sacs surrounded by single membrane like vesicles
11 of 11

Other cards in this set

Card 2

Front

Eukaryotes?

Back

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

Card 3

Front

Organelles?

Back

Preview of the front of card 3

Card 4

Front

Largest Organelle & Function?

Back

Preview of the front of card 4

Card 5

Front

role of nucleolus?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Biological molecules resources »