Wk 1

Question 1

What is a Prokaryotic cell?

Answer 1

• A simple internal organisation
• Single enclosed compartment surrounded by plasma membrane

Question 2

What is a Eukaryotic cell?

Answer 2

• Complex internal organisation
• Defined membrane bound nucleus
• Internal membrane that enclose other compartments (organelles)

Question 3

What is gram positive bacteria?

Answer 3

• Have cell walls made from a thick layer of peptidoglycan
• Retain crystal violet dye; darker colour (purple)
• Generally easier to kill, absorb antibiotics and chemicals more easily

Question 4

What is gram negative bacteria?

Answer 4

• Have cell walls made from a thin layer of peptidoglycan
• Do not retain crystal violet dye; lighter colour (pink)
• Located beneath an outer lipid membrane

Question 5

What is a virus?

Answer 5

Unable to reproduce or carry out functions on their own; must hijack the metabolic machinery of their host.

Question 6

What is a fungi?

Answer 6

• Can be single or multi-cellular
• They can infect humans (Mycosis) and cause diseases
• Usually affecting skin, hair, nails and mucous membranes (epithelial tissues) (mouth, throat, lungs etc

Question 7

What are protists?

Answer 7

• Single cell
• No cell wall (have protein film)
• Uni or multicellular

Question 8

Why is staining used?

Answer 8

To highlight important features of the tissue as well as to enhance the tissue contrast.

Question 9

What are artifacts?

Answer 9

Things on the slide that should not be there.