Test #3- Translation Flashcards Preview

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Flashcards in Test #3- Translation Deck (12)
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1
Q

What is the function, location and purpose of translation?

A
  • converting genes to protein
  • ribosomes
  • synthesising proteins
2
Q

What does mRNA do?

A

messenger RNA–specifying amino acid sequence of proteins from DNA to ribosomes

3
Q

What dies tRNA do?

A

Transfer RNA–translated mRNA codons into amino acids

4
Q

What does rRNA do?

A

Ribosomal RNA– catalytic and structural roles in ribosomes

5
Q

what does the primary transcript do?

A

precursor to mRNA, rRNA, and tRNA

6
Q

What does snRNA do?

A

small nuclear RNA– complexes of proteins and RNA that splice pre-mRNA. Also plays structural and catalytic roles in Spliceosomes

7
Q

What is the Wobble theory?

A

that there are 64 codons but only 45 tRNA–possible that the last codon doesn’t need exact protein that it is for

8
Q

What are the sites of actions in ribosomes?

A

E-exit
P- peptidyl- tRNA binding site
A- amino acytl-tRNA binding site

9
Q

what are the 3 steps in Translation?

A

Start codon (MET)
adds a protein to P each time then it moves over to the left
the release factor binds to the A site

10
Q

What are the ends of RNA of a polypeptide?

A

NH2 (first formed)

COOH (last formed)

11
Q

How is the COOH end made?

A

the break down of water and the CO-

12
Q

What are 3 modifications to a functional protein?

A

1) protein folding
2) post translational modification
3) Signal peptide at N-terminus (NH2) like an address