Apps- Gram staining review

Unit conversion. Bacteria has a length of 2.3um, what is the length in nm

• 23000

• 2300

• 0.0023

• 23

If you want to work out the magnification, which calculation would be correct?

• Actual/ image

• Image x actual

• Image/actual size

Attachment to cells and involved in sexual reproduction

• Pili

• Plasmid

• Granule

• Mesosome

Site for protein synthesis

• Pili

• Circular DNA

• Membrane

• Ribosome

1. Heat fix smear of ___________ onto clean microscope slide

2. Flood with _____ ______

Which bacteria take up the crystal violet stain?

• Gram positive

• Gram negative

• None

• All

3. 3. Wash the smear with Gram's ________

What is the role of the Gram's Iodine?

• Turn stain red

• Turn stain purple

• Fix stain into wall

• Decolourise bacteria

4. 4. After decolourising with ethanol you add a counter stain, this is a ___ stain