2.3 Translation (PS) Flashcards Preview

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Flashcards in 2.3 Translation (PS) Deck (19):
1

What happens during translation?

Amino acids are joined to make a polypeptide chain, following the sequence of codons given by the mRNA

2

Where does translation occur?

At the ribosomes in the cytoplasm

3

What happens to the amino acids in the cytoplasm?

They become attached to a tRNA molecule

4

Where is tRNA found?

In the cytoplasm

5

What is the structure of tRNA?

- clover like shape
- amino acid binding site at one end
- sequence of 3 bases at one end

6

What are the 3 bases on tRNA called?

The anticodon

7

What does tRNA do?

It carries the amino acids to the ribosome during translation

8

What is the anticodon on the tRNA complimentary to?

The codons on the mRNA molecule

9

What does the mRNA do once in the cytoplasm?

Attaches itself to a ribosome

10

What does tRNA do once mRNA has attached itself to a ribosome?

Carries the amino acids to the ribosome for translation

11

What does the first tRNA molecule that attaches itself have?

An anticodon complimentary to the start codon on the mRNA

12

What do the tRNA molecules attach themselves to the mRNA by?

Complimentary base pairing

13

What does rRNA in the ribosome do as tRNA molecules begin attaching?

Catalysed the formation of peptide bonds between amino acids on the tRNA joining them together

14

What is rRNA?

Ribosomal RNA

15

What does rRNA form?

The two subunits of a ribosome

16

What does rRNA do?

As the ribosome moves along the mRNA strand during translation, it catalyses the formation of peptide bonds between amino acids

17

What happens to the tRNA once rRNA joins the amino acids?

The tRNA moves away leaving the amino acids behind

18

What happens after the first tRNA leaves?

The process of joining and leaving continues until there is a stop codon on the mRNA molecule

19

What happens once the stop codon is met?

The polypeptide chain then moves away and translation is complete

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