Practical 3 - Preperation And Scientific Drawing Of A Slide Of Onion Cells Flashcards
What is an onion made of?
Swollen leaf bases separated by thin membranes of cells
What’s the name of the layer we removed from the onion?
Epidermis layer
What do we have to ensure with the epidermis layer?
Ensue it’s a single, non-folded layer
What do we do to the cell walls and the nucleus before looking at them under the microscope?
Stain them with iodine
What do we stain the onion with?
Iodine
What do we cut the onion with and how big?
A scalpel, 1cm cubed
What do we slice the onion on?
A white ceramic tile
How did we remove the epidermis layer from the onion?
With forceps
Which parts of the onion cells could we recognise under the microscope?
-Cell wall
-Nucleus
-Cytoplasm
-Vacuole
What’s it always important to do when drawing cells?
Label them!