Mr Pearson Flashcards
What is an Ultra-structure?
The organelles and their internal structures make up the cells ultra-structure.
Think of Earth, with the people and other objects contained within
What is the Plasma Membrane?
- Regulates movement of molecules into / out of the cell
- Responds to chemicals / hormones which come into contact with it
What is the Nucleus?
The nucleus contains genetic information and controls the cell
What is the Nucleolus?
The nucleolus is the site of ribosome synthesis and contains RNA
What is Mitochondria?
- Site of aerobic respiration
- Produces ATP ( energy store )
What is the Ribosome (80’s)?
Structure:
- 2 sub-units - Large and small
- Molecule will be formed between
Function:
- Site of protein synthesis
What are Vesicles?
It’s function is to transport material within the cell
What is Exocytosis?
Releasing material from the cell
What is Endocytosis?
Absorbing material into the cell
What is a Lysosome?
Structure:
- Vesicles containing hydrolytic enzymes
Function:
- Breakdown waste material inside the cell and digest foreign particles
What is the Smooth Endoplasmic Reticulum (SEr)?
Structure:
- Flat cavities with no attachments
Function:
- Synthesis carbohydrates and lipids
What is the Rough Endoplasmic Reticulum ( REr)?
Structure:
- Flat cavities with ribosomes attached
Function:
- Synthesis and transportation of proteins
What is the Golgi Apparatus?
Proteins arrive from the REr in vesicles
Function:
- Proteins are modified before being sent away in vesicles
What is the Centriole?
Function:
- They form spindle fibres which move chromosomes during cell division
Hint:
- They’re used during mitosis and meiosis
What is the Cell Wall?
Provides tensile strength and mechanical protection from osmotic pressure