IB Biology Topic D1.2.10 Stepwise Movement of the Ribosome Along Mrna Revision Notes (SL/HL)

IB Biology Topic D1.2.10 Stepwise Movement of the Ribosome Along Mrna Revision Notes (SL/HL) | RevisionDojo

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The ribosome extends the polypeptide by repeating a three-step elongation cycle as it moves 5' to 3' along the mRNA.

Definition

Elongation

Elongation is the stage where the polypeptide chain grows, one amino acid at a time.

The elongation cycle repeats three steps for every amino acid added.

Codon recognition
1. An incoming tRNA pairs its anticodon with the complementary codon in the A site.
Peptide bond formation
1. The rRNA of the large subunit acts as a ribozyme to join the amino acids with a peptide bond.
Translocation
1. The ribosome shifts one codon along the mRNA, opening the A site for the next tRNA.

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The ribosome extends the polypeptide by repeating a three-step elongation cycle as it moves 5' to 3' along the mRNA.

Definition

Elongation

Elongation is the stage where the polypeptide chain grows, one amino acid at a time.

The elongation cycle repeats three steps for every amino acid added.

Codon recognition
1. An incoming tRNA pairs its anticodon with the complementary codon in the A site.
Peptide bond formation
1. The rRNA of the large subunit acts as a ribozyme to join the amino acids with a peptide bond.
Translocation
1. The ribosome shifts one codon along the mRNA, opening the A site for the next tRNA.

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 D1.2.10: Stepwise Movement of the Ribosome Along Mrna Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

The ribosome extends the polypeptide by repeating a three-step elongation cycle as it moves 5' to 3' along the mRNA.

The elongation cycle repeats three steps for every amino acid added.

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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The ribosome extends the polypeptide by repeating a three-step elongation cycle as it moves 5' to 3' along the mRNA.

The elongation cycle repeats three steps for every amino acid added.

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