3.6: Prokaryotic cells and viruses Flashcards
Although cells come in a diverse variety of what?
Although cells come in a diverse variety of:
- Size
- Shape
- Function
Although cells come in a diverse variety of size, shape and function, they are of how many main types?
Although cells come in a diverse variety of size, shape and function, they are of 2 main types:
- Eukaryotic cells
- Prokaryotic cells
Although cells come in a diverse variety of size, shape and function, they are of 2 main types - eukaryotic cells and prokaryotic cells.
Eukaryotic cells are larger and have a nucleus bounded by what?
Eukaryotic cells:
- Are larger
- Have a nucleus bounded by nuclear membranes (nuclear envelope)
Although cells come in a diverse variety of size, shape and function, they are of 2 main types - eukaryotic cells and prokaryotic cells.
Eukaryotic cells are larger and have a nucleus bounded by nuclear membranes (nuclear envelope).
Prokaryotic cells are smaller and have no what?
Prokaryotic cells are smaller and have no:
1. Nucleus
Or,
2. Nuclear envelope
Bacteria occur where in the world?
Bacteria occur in every habitat in the world
Bacteria occur in every habitat in the world - they are what?
Bacteria occur in every habitat in the world - they are:
- Versatile
- Adaptable
- Very successful
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of what?
Much of their success is a result of their small size
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from what to what in length?
Much of their success is a result of their small size, normally ranging from: 1. 0.1 μm to 2. 10 μm in length
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess what?
All bacteria possess a cell wall
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess a cell wall, which is made up of what?
All bacteria possess a cell wall, which is made up of murein
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess a cell wall, which is made up of murein.
What is murein?
Murein is a polymer of:
- Polysaccharides
- Peptides
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess a cell wall, which is made up of murein.
Murein is a polymer of polysaccharides and peptides.
Many bacteria further do what by secreting what?
Many bacteria further protect themselves by secreting a capsule of mucilaginous slime around this wall
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess a cell wall, which is made up of murein.
Murein is a polymer of polysaccharides and peptides.
Many bacteria further protect themselves by secreting a capsule of mucilaginous slime around this wall.
Inside the cell wall is the what?
Inside the cell wall is the cell-surface membrane
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess a cell wall, which is made up of murein.
Murein is a polymer of polysaccharides and peptides.
Many bacteria further protect themselves by secreting a capsule of mucilaginous slime around this wall.
Inside the cell wall is the cell-surface membrane, within which is what?
Inside the cell wall is the cell-surface membrane, within which is the cytoplasm
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess a cell wall, which is made up of murein.
Murein is a polymer of polysaccharides and peptides.
Many bacteria further protect themselves by secreting a capsule of mucilaginous slime around this wall.
Inside the cell wall is the cell-surface membrane, within which is the cytoplasm that contains what?
Inside the cell wall is the cell-surface membrane, within which is the cytoplasm that contains 70S ribosomes
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess a cell wall, which is made up of murein.
Murein is a polymer of polysaccharides and peptides.
Many bacteria further protect themselves by secreting a capsule of mucilaginous slime around this wall.
Inside the cell wall is the cell-surface membrane, within which is the cytoplasm that contains 70S ribosomes.
These ribosomes are smaller than what?
These ribosomes are smaller than those in the cytoplasm of eukaryotic cells (80S)
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
All bacteria possess a cell wall, which is made up of murein.
Murein is a polymer of polysaccharides and peptides.
Many bacteria further protect themselves by secreting a capsule of mucilaginous slime around this wall.
Inside the cell wall is the cell-surface membrane, within which is the cytoplasm that contains 70S ribosomes.
These ribosomes are smaller than those in the cytoplasm of eukaryotic cells (80S), but nevertheless still do what?
These ribosomes are smaller than those in the cytoplasm of eukaryotic cells (80S), but nevertheless still synthesise proteins
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
Bacteria store food how?
Bacteria store food reserves
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
Bacteria store food reserves as what?
Bacteria store food reserves as:
- Glycogen granules
- Oil droplets
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
The genetic material in bacteria is in the form of what?
The genetic material in bacteria is in the form of a circular strand of DNA
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
The genetic material in bacteria is in the form of a circular strand of DNA.
Separate from this are what?
Separate from this are smaller, circular pieces of DNA, plasmids
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
The genetic material in bacteria is in the form of a circular strand of DNA.
Separate from this are smaller, circular pieces of DNA, plasmids.
These can do what themselves independently?
Plasmids can reproduce themselves independently
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
The genetic material in bacteria is in the form of a circular strand of DNA.
Separate from this are smaller, circular pieces of DNA, plasmids.
Plasmids can reproduce themselves independently and may give the bacterium what?
Plasmids:
- Can reproduce themselves independently
- May give the bacterium resistance to harmful chemicals
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
The genetic material in bacteria is in the form of a circular strand of DNA.
Separate from this are smaller, circular pieces of DNA, plasmids.
Plasmids can reproduce themselves independently and may give the bacterium resistance to harmful chemicals, such as what?
Plasmids:
- Can reproduce themselves independently
- May give the bacterium resistance to harmful chemicals, such as antibiotics
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
The genetic material in bacteria is in the form of a circular strand of DNA.
Separate from this are smaller, circular pieces of DNA, plasmids.
Plasmids can reproduce themselves independently and may give the bacterium resistance to harmful chemicals, such as antibiotics.
Plasmids are used extensively as what?
Plasmids are used extensively as vectors in genetic engineering
Bacteria occur in every habitat in the world - they are versatile, adaptable and very successful.
Much of their success is a result of their small size, normally ranging from 0.1 μm to 10 μm in length.
Their cellular structure is relatively simple.
The genetic material in bacteria is in the form of a circular strand of DNA.
Separate from this are smaller, circular pieces of DNA, plasmids.
Plasmids can reproduce themselves independently and may give the bacterium resistance to harmful chemicals, such as antibiotics.
Plasmids are used extensively as vectors (what) in genetic engineering?
Plasmids are used extensively as vectors (carriers of genetic information) in genetic engineering
The role of the cell wall is that it is a physical barrier that excludes what and protects against what?
The role of the cell wall is that it is a physical barrier that:
- Excludes certain substances
- Protects against mechanism damage and osmotic lysis
The role of the slime capsule is that it protects what and helps what?
The role of the slime capsule is that it:
- Protects the bacterium from other cells
- Helps groups of bacteria to stick together for further protection
The role of the cell-surface membrane is that it acts as a what layer, which controls what?
The role of the cell-surface membrane is that it acts as a differentially permeable layer, which controls the:
1. Entry
2. Exit
of chemicals
The role of the circular strand of DNA is that it possesses what for what?
The role of the circular strand of DNA is that it possesses the genetic information for the replication of bacterial cells
The role of the plasmid is that it possesses what that may do what?
The role of the plasmid is that it possesses genes that may aid the survival of bacteria in adverse conditions