IB Biology Topic D1.2.3 Stability of DNA Templates Revision Notes (SL/HL)

IB Biology Topic D1.2.3 Stability of DNA Templates Revision Notes (SL/HL) | RevisionDojo

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DNA is a stable template that can be transcribed many times without its base sequence changing

During transcription, DNA acts as a template that is read to build a complementary RNA strand.
The base sequence is not altered by transcription, so the same gene can be copied thousands of times.
This stability means a cell can produce the same proteins reliably across its whole lifetime.

Note

Somatic cells are all the body cells except the gametes (sperm and egg).
They do not pass DNA to offspring but must keep their own DNA intact to keep working.

Three mechanisms keep the DNA sequence intact during transcription

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DNA is a stable template that can be transcribed many times without its base sequence changing

During transcription, DNA acts as a template that is read to build a complementary RNA strand.
The base sequence is not altered by transcription, so the same gene can be copied thousands of times.
This stability means a cell can produce the same proteins reliably across its whole lifetime.

Note

Somatic cells are all the body cells except the gametes (sperm and egg).
They do not pass DNA to offspring but must keep their own DNA intact to keep working.

Three mechanisms keep the DNA sequence intact during transcription

Definition

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(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

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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.

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A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D1.2.3: Stability of DNA Templates Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

DNA is a stable template that can be transcribed many times without its base sequence changing

Three mechanisms keep the DNA sequence intact during transcription

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

Excepteur sint occaecat cupidatat non proident

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DNA is a stable template that can be transcribed many times without its base sequence changing

Three mechanisms keep the DNA sequence intact during transcription

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

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account