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PCR Techniques and Concepts

PCR Techniques and Concepts

Assessment

Interactive Video

Biology

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

Dr. Melody Knowlton introduces PCR, a technique to amplify DNA, used in labs worldwide and in forensic science. The video explains the components needed for PCR, such as the master mix, primer mix, and template DNA, and demonstrates how to add them to a PCR tube. It highlights common mistakes in pipetting and how to avoid them. The PCR process involves denaturing, annealing, and extension stages, which are cycled in a PCR machine to produce multiple DNA copies.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of PCR in forensic science?

To identify the color of DNA

To change the DNA sequence

To make multiple copies of DNA

To destroy DNA samples

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which component in PCR acts as the 'copy machine'?

DNA polymerase

Primer mix

Template DNA

dNTPs

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of primers in a PCR reaction?

To provide energy for the reaction

To change the temperature of the reaction

To indicate where the enzyme should start and stop

To act as a template for new DNA

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a common mistake when using a micropipette in PCR preparation?

Using too much liquid

Introducing bubbles by pushing to the second stop

Not using a pipette tip

Using the wrong type of liquid

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to avoid introducing bubbles in the PCR mixture?

Bubbles can prevent proper mixing of components

Bubbles can increase the temperature of the reaction

Bubbles can cause the reaction to explode

Bubbles can change the color of the mixture

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in the PCR process?

Denaturation

Cooling

Extension

Annealing

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During the annealing step, what happens to the primers?

They bind to the single-stranded DNA

They evaporate

They are destroyed

They change color

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