Cells Flashcards
Completed
A cell is…
Ther smallest living organism.
All cells have…
Cell membrane, cytoplasm and DNA
The cell membranes job is to…
Separate the inside cell environment to the outside environment.
An organelle is…
A ‘little organ’ which is specialised with a unique job
Three characteristics of a prokaryotic cell
- No nucleus or membrane enclose organelles.
- DNA is not enclosed (presents as chromatin)
- always functions alone as a single cell e.g.bacteria
Chromatin
DNA which is not enclosed with In a nuclear membrane.
Nucleus
The control centre of the cell containing the DNA which controls what the cell does and how.
When a cell divides what does DNA do?
Condenses into chromosomes.
The nucleus contains a nucleolus which does what?
Makes ribosomes
When ribosomes leave the nucleus what do they do?
Float in cytoplasm or attach to rER, and synthesize/make protein
The ER is…
A membrane enclosed passage which can transport proteins synthesized by ribosomes which are then released by vesicles.
Once the ER releases vesicles of protein what happens?
The vesicles are received by the Golgi Apparatus.
What happens to the proteins in the Golgi Apparatus?
Proteins are customised into useable forms through folding or adding other forms such as lipids or carbohydrates.
Lysosomes do what?
Collect dead or damaged cell parts with enzymes to break them down.
The mitochondria do what?
Through cellular respiration make ATP, the energy for the cell.
