Prokaryotic Cells And Viruses Flashcards
Compare prokaryotic and eukaryotic cells
In P there’s no nucleus, whereas in E there’s s distinct nucleus with a nuclear envelope
In P dna is not associated with proteins, whereas in E dna is associated with proteins called histones
P contains no membrane bounded organelles. E contains membrane bound organelles
In P there are no chloroplasts, only bacterial chlorophyll associated with the cell surface membrane in some bacteria. Chloroplasts are present in E
In P ribosomes are smaller (70s). In E they are 80s
In P cell wall is made of murein. In E mostly made of cellulose
In P May contain a capsule. In E there’s no capsule
What is bacteria cell wall made up of
Murein
What organelles are found in the bacteria cell? What’s there function
Flagellum - makes cell move (not all have it)
Genetic material - compromises a large circle of dna
Cytoplasm - has no membrane bounded organelles, contains enzymes and other soluble materials
Ribosomes- smaller then eukaryotic cells
Capsule - helps protect bacteria from attack by cells ( made up of slime)
Cell wall- supports cell and prevents from changing shape
Plasma membrane - controls what goes in and out of cell
Plasmid - small loops of dna, not always in them.
What are viruses
Nucleic acids surrounded by protein - not alive
What is in a virus structure
Genetic material (dna or rna)
Capsid-Protein coat around core
Attachment proteins - let virus cling onto a suitable host cell
What do viruses do
Invade and reproduce inside the cells of other organisms, known as host cells