Serial Dilutions Quiz

What is a serial dilution?

• A stepwise dilution of a substance in solution

• A method to prepare samples one by one

• A process of reducing the volume of a solution

• A technique to increase the concentration of a solution

How is the dilution in each tube expressed?

• As a fraction (1/X)

• As a decimal

• As a percentage

• As a whole number

How is the final sample dilution calculated?

• By multiplying the fractions from each tube

• By adding the fractions from each tube

• By subtracting the fractions from each tube

• By dividing the fractions from each tube

If Tube 1 has a 1/20 dilution and a concentration of 50 ng/ml, what is the concentration in Tube 2?

• 2.5 ng/ml

• 10 ng/ml

• 25 ng/ml

• 100 ng/ml

If the final concentration in the first tube is 200 ng sample/ml, what is the concentration in the other three tubes?

• 10 ng/ml, 0.5 ng/ml, 0.025 ng/ml

• 100 ng/ml, 5 ng/ml, 0.25 ng/ml

• 50 ng/ml, 2.5 ng/ml, 0.125 ng/ml

• 25 ng/ml, 1.25 ng/ml, 0.0625 ng/ml