Practical 3 - Preperation And Scientific Drawing Of A Slide Of Onion Cells Flashcards
1
Q
What is an onion made of?
A
Swollen leaf bases separated by thin membranes of cells
2
Q
What’s the name of the layer we removed from the onion?
A
Epidermis layer
3
Q
What do we have to ensure with the epidermis layer?
A
Ensue it’s a single, non-folded layer
4
Q
What do we do to the cell walls and the nucleus before looking at them under the microscope?
A
Stain them with iodine
5
Q
What do we stain the onion with?
A
Iodine
6
Q
What do we cut the onion with and how big?
A
A scalpel, 1cm cubed
7
Q
What do we slice the onion on?
A
A white ceramic tile
8
Q
How did we remove the epidermis layer from the onion?
A
With forceps
9
Q
Which parts of the onion cells could we recognise under the microscope?
A
-Cell wall
-Nucleus
-Cytoplasm
-Vacuole
10
Q
What’s it always important to do when drawing cells?
A
Label them!
