Karteikarten
Prokaryotic Cells and Viruses
Karten in diesem Stapel (7)
- 1Prokaryotic Cells (8 things)- Smaller than Eukaryotic
- Not associated with proteins
- No nucleus
- Circular DNA
- No Membrane bound organelles
- Cell Wall made of Murein
- Have mucilaginous slime
- 70S ribosomes - 2Eukaryotic Cells (8 things)- Bigger than Prokaryotic
- Linear DNA
- DNA associated with proteins (histones)
- Membrane bound organelles
- Nucleus with nuclear membrane
- Cellulose (plant) or chitin (fungi) cell wall
- No slime capsule
- 80S ribosomes - 3What is the structure and function of a bacterial cell wall?A bacterial cell wall is made of murein which is a polymer of polysaccharides and peptides, it is a physical barrier and provides protection.
- 4What is the slime called in a bacterium slime capsule, what is its purpose?The slime capsule is made of mucilaginous slime and is for further protection against other cells, plus it allows several bacterium to stick together, again providing more protection.
- 5What are free floating in the cytoplasm of a bacterium?70S ribosomes
- 6The genetic material in a bacterium is in the form of a circular strand of DNA and it also has smaller pieces of DNA called plasmids. What is the function of plasmids?They can reproduce independently and may give the bacterium resistance to harmful chemicals such as antibiotics.
- 7Viruses- a-cellular, non-living particles
- 20-300nm
- Nucleic acids enclosed in a protein coat called the capsid
- Contains RNA and DNA (the nucleic acids) but can only multiply inside host cells
- Some (such as HIV) surrounded by a lipid envelope and have proteins which allow the virus to identify and attach to host cells
Informationen
- Beschreibung
- AS - Level Biology (3 - Cell Structure) Karteikarten am Prokaryotic Cells and Viruses , erstellt von Bee Brittain am 12/04/2016.
- Erstellt von
- Bee Brittain
- Aufrufe
- 47
- Tags
- Bewertung