Dilution and Reaction Procedures

Dilution and Reaction Procedures

Assessment

Interactive Video

Chemistry

10th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial covers the preparation and execution of a dilution protocol for testing contamination levels. It includes gathering materials, setting up the dilution, measuring accurately, and mixing solutions. The process involves using a db6 buffer, incubating the reaction, and employing a test strip for quantification. The results are analyzed using a quick scan system to determine the Don level in the sample.

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9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What additional items are necessary when running dilutions?

Extra reaction tubes

More test strips

Additional filters

Extra tubes and pipette tips

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What should be done if the initial result exceeds the assay maximum?

Discard the sample

Add more buffer

Retest by further dilution

Increase the temperature

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct dilution ratio for creating a 1:128 dilution?

100 microliters of extract plus 700 microliters of water

50 microliters of extract plus 750 microliters of water

200 microliters of extract plus 600 microliters of water

150 microliters of extract plus 650 microliters of water

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the specified amount of DB6 buffer to add to the reaction tube?

50 microliters

100 microliters

150 microliters

200 microliters

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At what temperature should the sample be acclimated?

25 degrees Celsius

22 degrees Celsius

18 degrees Celsius

20 degrees Celsius

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What should be done immediately after the reaction time specified in the product insert?

Retest the sample

Increase the temperature

Cut off and discard the arrow tape section

Add more buffer

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What system is used for quantification after the reaction?

Reaction system

Buffer system

Dilution system

Quick scan system

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What should be selected on the quick scan results screen under the dilution tab?

Option A

Option D

Option C

Option B

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is recorded by the system after selecting the correct option on the quick scan results screen?

The buffer level

The reaction time

The dilution ratio

The Don level in the diluted sample