Parts of a Cell Flashcards
1
Q
Structure of Nucleus
A
- Double Membrane (Nuclear Envelope)
- Nucleolus contains RNA
- Chromatin is DNA wrapped around histone proteins
2
Q
Function of Nucleus
A
- Nucleolus makes ribosomes
- Control center of the cell
- Stores the genome
- Transmits genetic information
- Provides instructions for proteinsynthesis
3
Q
Structure of RER
A
- System of membranes with fluid filled cavities called Cisternae
- Continuous with the nucleus membrane
- Coated with ribosomes
4
Q
Function of RER
A
- Intracellular transport system cisternae form channels
- Large SA for ribosomes which assemble amino acid
- Proteins actively pass through the membrane into the cisternae and are sent to Golgi
5
Q
Structure of SER
A
- System of membranes with fluid filled cavities called Cisternae
- Continuous with the nucleus membrane
- No ribosomes
6
Q
Function of SER
A
- Contains Enzymes for lipid metabolism reactions
- Synthesis of cholesterol
- Synthesis of Lipids and Phospholipids
- Synthesis of steroid hormones
- Absorption, synthesis and transport of lipids
7
Q
Structure of Golgi
A
- Stack of membrane bound flattened sacs
- Secretory Vesicles bring materials to and from
8
Q
Function of Golgi
A
- Proteins are modified
- Adding sugars or lipids
- Folded into 3D shape
- Packaged into vesicles and then pinched off
- Stored in cell
- Moved to plasma membrane to be used or exported
9
Q
Structure of Vacuole
A
- Surrounded by a memrane called a tonoplast
- Contains Fluid
10
Q
Function of Vacuole
A
- Plants have a large permanent vacuole
- Filled with H2O and Solutes maintains stability because it pushes against cell wall
11
Q
Structure of Lysosomes
A
- Small bags formed from golgi
- Contain powerful hydrolytic enzymes
12
Q
Function of Lysosomes
A
- Keep the powerful enzymes separate
- Engulf old organelles and foreign material, digest them and return for reuse
