Gcse Biology Flashcards
What does the cell membrane do?
Controls what enters and leaves the cell
What do ribosomes do?
Site of protein synthesis
What do the mitocondria do
Site of respiratation(release of energy from food)
What do the cytoplasm do?
Site of chemical reactions
What does the nucleus do?
Controls the cell
Contains the genetic information called DNA
What does the cellulose cell wall do?
Outer layer-gives the cell strength and support
What does the large permanent vacuole do?
Stores cell sap
What do chloroplasts do?
Contains chlorophyll, site of photosynthesis
What are the 8 parts of a microscope?
Eye piece lens
Objective lens
Clips
Stage
Coarse and fine focus wheel
Light source
Base
How much power is each lens
Eye piece- x10
Objective lens-x10(low power), X20(medium power),X40(high power)
How do you calculate total magnification?
Total magnification = eyepiece lensX objective lens
Define resolution
Resolution is the ability to distinguish between two separate points in an image
Define magnification
Magnification is how much bigger an image is compared to its actual size.
What type of microscope could be used for viewing for small organelles
Electron microscope
How are spell cells adapted for their function?
Stream line head and tail
Lots of mitochondria supply energy
