Title: Dilutions Equation: Practice Quiz #4C (optional)
Course: BTEC-1100-301-302-303-F21 > Section: Module 1 - Calculations and Measurements

Q: You have 35Â ÂµL of protein. How much 10x loading dye should be added to that protein? (You want to end up with 1x dye dissolved in protein).
- 3.9
- 3.5
- 350
A: 3.9
If right: Correct!
If wrong: That is incorrect. To dilute the 10x dye to 1x, you want 1 part dye plus 9 parts protein. So divide the DNA volume by 9.

Q: You have a 20 g/L stock. How many mL of stock do you need to make 100 mL of a 10 g/L solution?
- 50
- 500
- 5
A: 50
If right: Correct!
If wrong: That is incorrect. Divide the final volume by the dilution factor.

Q: You have a 2x stock. How many mL of stock do you need to make 100 mL of 1x?
- 50
- 500
- 5
A: 50
If right: Correct!
If wrong: That is incorrect. Divide the final volume by the dilution factor.

Q: You have a 10x stock. How many mL of stock do you need to make 100 mL of 1x?
- 10
- 100
- 1
A: 10
If right: Correct!
If wrong: That is incorrect. Divide the final volume by the dilution factor.