Required Practicals

Question 1

Whats the purpose of the stain

Answer 1

Whats the purpose of the stain

Highlight objects in a cell

Question 2

What is used to make the cytoplasm show up

Answer 2

Eosin is used to make the cytoplasm show up

Question 3

Iodine is potassium iodide solution is used to …

Answer 3

Iodine is potassium iodide solution is used to stain starch grains in plant cells

Question 4

Preparing a microscope

Answer 4

Preparing a microscope

Pipette a small drop of water onto the centre of the slide

Use tweezers to place a thin section of your specimen on top of the water drop

Add a drop of stain

Add the cover slip, stand the slip upright on the slide, next to the water droplet, then tilt and lower it so it covers the specimen. ( no air bubbles)

Question 5

Microbiology practical

Answer 5

Microbiology practical

Clean hands and work area throughly before and after the experiment

Spray bench w disinfectant

Wipe w paper towels

Use a permanent marker to mark the bottom of the nutrient agar plate

Make sure lid is tight to avoid contamination

Divide plate into three equal sections and number 1, 2, 3 around the edges

Put a dot into the middle of each section

Add ur initials, the name and date if the bacteria

Question 6

Osmosis required practical

Answer 6

Osmosis required practical

Line up 5 test tubes in a rack

Add 10cm3 of the initial 2M sucrose solution to the first test tube and 5cm3 of distilled water to the other four test tubes

Use a pipette and draw 5cm3 of the solution from the first test tube, add it to the 5cm3 distilled water in the second test tube and mix the solution throughly

You now have 10cm3 of solution thats half as concentrated as the solution in the first test tube (its 1 mole)

Repeat the process three times to create solutions of 0.5m, 0.25m and 0.125m