IB Biology Topic D1.1.4 Polymerase Chain Reaction and Gel Electrophoresis Revision Notes (SL/HL)

IB Biology Topic D1.1.4 Polymerase Chain Reaction and Gel Electrophoresis Revision Notes (SL/HL) | RevisionDojo

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PCR Amplifies Tiny DNA Samples

Definition

PCR (Polymerase Chain Reaction)

A technique that amplifies DNA, creating millions of copies of a specific DNA sequence in just a few hours.

This lets scientists study tiny DNA samples from crime scenes, fossils, or other sources.

What PCR Needs

Template DNA
1. The DNA you want to copy.
Primers
1. Short DNA sequences that bind to the template and mark the starting point for copying.
Taq polymerase
1. A heat-resistant enzyme that builds new DNA strands.
Nucleotides (dNTPs)
1. The building blocks of DNA.
Thermal cycler
1. A machine that controls the temperature changes precisely.

Tip

Primers are essential because Taq polymerase cannot start building DNA without them.
They are designed to match the beginning and end of the target sequence.

The Three Steps of a PCR Cycle

PCR repeats a cycle of three steps 20 to 40 times, doubling the target DNA each time.

Denaturation (about 95°C)

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Note

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Tip

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
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Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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PCR Amplifies Tiny DNA Samples

Definition

PCR (Polymerase Chain Reaction)

A technique that amplifies DNA, creating millions of copies of a specific DNA sequence in just a few hours.

This lets scientists study tiny DNA samples from crime scenes, fossils, or other sources.

What PCR Needs

Template DNA
1. The DNA you want to copy.
Primers
1. Short DNA sequences that bind to the template and mark the starting point for copying.
Taq polymerase
1. A heat-resistant enzyme that builds new DNA strands.
Nucleotides (dNTPs)
1. The building blocks of DNA.
Thermal cycler
1. A machine that controls the temperature changes precisely.

Tip

Primers are essential because Taq polymerase cannot start building DNA without them.
They are designed to match the beginning and end of the target sequence.

The Three Steps of a PCR Cycle

PCR repeats a cycle of three steps 20 to 40 times, doubling the target DNA each time.

Denaturation (about 95°C)

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D1.1.4: Polymerase Chain Reaction and Gel Electrophoresis Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

PCR Amplifies Tiny DNA Samples

What PCR Needs

The Three Steps of a PCR Cycle

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PCR Amplifies Tiny DNA Samples

What PCR Needs

The Three Steps of a PCR Cycle

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Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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