Nutrients & Algal Growth I: In-class quiz

Nitrogen and Phosphorus

What are the limiting nutrients that we will test in this lab class?

Volume is the amount of space occupied by a sample; we will use millileters and microleters.

What is the definition of volume? And which unit of volume will you use in this class?

concentration is the amouont of solute dissolved in a solvent; we will use mg/L

What is the definition of concentration? And which unit of concentration you will use in this class?

You would need 2 mL

If you want to make 10 ml of 10 mg/L Nitrogen solution, how much volume of stock solution do you need? Starting concentration of Nitrogen stock solution is 50 mg/L *(numbers can be changed in actual quiz).

Gram positive bacteria has a thick peptidoglycan layer and no membrane, gram negative bacteria has a thin peptidoglycanlayer and a celle membrane

What is the difference between Gram positive and Gram negative bacteria?

Gram positive bacteria is stained purple, gram negative is stained pink

After Gram Staining, which type of bacteria are stained purple? And which type of bacteria are stained pink?

the zone of inhibition is the zone surrounding an antibiotic where no growth occurs

What is the zone of inhibition?

The substrate is hydrogen peroxide and the product is water and oxygen

What are the substrate and the product of Catalase test in this experiment?