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Other, Biology
11th -
12thgrade
PLTW, MI Unit 1 Serial Dilution Practice
7 questions
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- 1. Multiple Choice
If 1 mL sample is put into tube #1 that has 24 ml diluent, what is the tube dilution? What is the final dilution?
Tube 1/25
Final 1/50
Tube 1/50
Final 1/25
- 2. Multiple Choice
If 1 mL sample form tube #1 with a tube dilution of 1/25 is placed in tube #2 with 24 mL of diluent, what is the tube dilution and what is the final dilution of tube #2?
tube dilution 1/50
tube dilution 1/25
final dilution 1/625
final dilution 1/50
- 3. Multiple Choice
If the concentration of tube 1 is 150 ng/ml (tube 1 is now the starting stock solution) and 1 ml of sample is moved each time into 24 ml of diluent to complete 3 dilutions from the first tube, what is the concentration in tube #4 or the third dilution?
150 ng/ml
6 ng/ml
0.24 ng/ml
0.0096 ng/ml
- 4. Multiple Choice
If 20 uL sample is put into tube #1 with 100 uL diluent, what is the tube dilution and final dilution of tube #1?
tube dilution 20/100 or 1/5
tube dilution 20/120 or 1/6
final dilution 20/120 or 1/6
final dilution 20/100 or 1/5
- 5. Multiple Choice
If 1 mL sample is put into tube #1 that has 49 mL of diluent, what is the tube dilution?
1/49
1/50
- 6. Multiple Choice
If 2 mL sample is removed from a tube with a dilution of 1/50 and placed into a tube #2 with 48 ML diluent, what is the tube dilution and final dilution for tube #2?
tube dilution 2/48 or 1/24
tube dilution 2/50 or 1/25
final dilution 1/50
final dilution 1/1250
- 7. Multiple Choice
If the concentration of the stock solution of 50 ng/ml, what is the concentration of a tube with final dilution of 1/1250?
0.2 ng/mL
50 ng/mL
0.04 ng/mL
2 ng/mL
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