B1 Struggles Flashcards
1
Q
Features of light microscope (2)
A
- some sub cellular structures
- see different features of cells
2
Q
Feature of electron microscope (1)
A
- can only see dead specimens in vacuum
3
Q
Parts of bacteria cell (6)
A
- strand of DNA
- cytoplasm
- membrane
- cell wall
- plasmid
- flagella
4
Q
5 parts of animal cell
A
- ribosomes
- cell membrane
- nucleus
- cytoplasm
- mitochondria
5
Q
Relative size of eukaryotic cell
A
1-100 micrometres [1 x 10(^-6)]metres
6
Q
Size comparison of bacteria and plant cell (1)
A
- bacteria much smaller
7
Q
Evidence that animals/plant cells could of been bacteria cells (4)
A
- bacteria 1-2 magnitudes smaller
- bacteria free genetic material
- reproduce
- Mitochondria + cytoplasm similar size in bacteria
8
Q
Features of active transport (2)
A
- only specific substances
- only happens on a concentration gradient
9
Q
Difference between single-celled organisms and multi-celled organism (1)
A
- Single celled as higher SA:VOL ration to exchange materials more effeciantly
10
Q
Circulation of blood in fish [+ gills] (4)
A
- gills extract O2 from water increasing SA
- blood goes to cells with O2
- remove metabolic waste
- repeats at quick rate
11
Q
Adaptations for exchanging materials + examples (4)
A
- Large SA (Alveoli)
- Thin membrane (Stomata)
- Steep concentration gradient for efficient supply (gills)
- ventilated maintains steep gradient (breathing)
