B1.1 Flashcards
What are the two types of cells?
- Eukaryotic cells
- Prokaryotic cells
Two examples of Eukaryotic cells?
- Plant
- Animal
An example of Prokaryotic cells?
Bacteria
What does an Eukaryotic cell have that Prokaryotic cells don’t?
Nucleus
What’s smaller, a prokaryotic or eukaryotic cell
Prokaryotic
What is contained in an animal cell?
- Nucleus
- Mitochondria
- Cell membrane
- cytoplasm
What is contained in a plant cell?
- Nucleus
- Mitochondria
- Cell membrane
- Cytoplasm
- Chloroplast
- Vacuole
- Cell wall.
What is a nucleus?
- Controls the activities in the cell
- Contains the genetic material
What does a plant cell contain that a animal cell doesn’t?
- Cell wall
- Vacuole
- Chloroplast
What is a mitochondria?
Where reactions take place
What is a cell membrane?
Barrier which controls what goes in and out
Creates an environment inside the cell
What is a cytoplasm?
A ‘jelly-like’ substance
What is a chloroplast?
Transfers energy to the plants from Sunlight
What is a cell wall?
A rigid walls that helps give structure
What is a vacuole?
An organism that stores nutrients, waste and water
What does unicellular mean?
Consist of just one cell
What is the size of a bacteria cell?
1μm
What subcellular organisms does bacteria consist of?
Cell membrane
Slime capsule
Cell wall
Plasmids
Flagella
Genetic material
Cytoplasm
Pili
What is a light microscope?
A instrument used to see small objects with light, invisible to the naked eye.
Parts of a light microscope
Eyepiece lens, objective lens, stage, slide, light, fine focus and coarse focus
What is the formula for total magnification?
Total magnification = Eyepiece lens magnification × objective lens magnification
What is the function of a stain?
To provide atificial colour to a cell
What does resolution mean?
The smallest distance between two points that can be seen as two different entities
What is an electron microscope?
A machine used to see small objects with electrons, invisible to the human eye.
Advantages of electron microscopes
Better resolution(1μm)
Advantages light microscopes
Cheap to buy and operate
Small and portable
Simple to prepare a sample
Natural colour of the sample is seen
Specimens could be living or dead
