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Prokaryotic cells and viruses
Terms in this set (14)
Name an example of a prokaryotic cell
A bacteria cell
What organelles don't prokaryotes contain
DNA, Mitochondria, Endoplasmic Reticulum, Golgi Apparatus
How much bigger are Eukaryotic cells compared to Prokaryotic cells?
Approximately 10 times bigger on average
Name the organelles that a prokaryotes contains
Cell wall, Capsule, Plasmid, Circular DNA, Cell surface membrane, Flagellum, cytoplasm, ribosomes, mesosome
What is the role of the Capsule?
Helps other prokaryotes to cling to each-other and other surfaces. Prevents the cell from drying out.
In disease causing prokaryotes, the capsule may protect against the hosts immune system.
What is the role of the cell surface membrane
Selectively permeable to ions and organic molecules which help it protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins.
What is the role of the plasmid?
Carries genes that often provide bacteria with genetic advantages, such as antibiotic resistance.
What is the role of Circular DNA?
Holds the genetic material of the cell and controls the cells activities.
What is the role of the flagellum?
Primarily used for cell movement. The prokaryotic flagellum spins, creating a forward movement by a corkscrew shaped filament
What is the role of the cytoplasm?
Where the functions for cell growth, metabolism and replication are carried out. It is a gel like matrix composed of water, enzymes, nutrients, waste and gases
What is the role of ribosomes?
Function as a workbench for protein synthesis whereby they receive and translate genetic instructions for the formation of specific proteins.
What does acellular mean?
Not consisting of, divided into or containing cells.
Why are viruses classed as non living?
As they do not need to consume energy to survive
Name the organelles in a virus
Capsid (Protein coat), viral genome, envelope, envelope protein, enzyme
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