ribosomes

Question 1

what is the body of aribosome?

Answer 1

ribonucleic acid and soma

Question 2

where can ribosomes be found?

Answer 2

free in cytosol or attathed to endoplasmic reticulum

Question 3

tRNA structure and fucntion?

Answer 3

enables translation of given mRNA codon into a certain amino acid, has anticodon which base pairs with complemntary codon on mRNA

Question 4

two stages of accurate translation?

Answer 4

1. correct match between a tRNA and an amino acid, done by enzyme aminoacyl-trna synthetase
2. a correct match between the trna anticodon and mrna codon

Question 5

what is the enzyme which matches trna to correct amino acid?

Answer 5

aminoacyl-trna synthetase

Question 6

what is a ‘wobble’?

Answer 6

flexible pairing at third base of codon allows for some trnas to bind more than one codon

Question 7

what are 3 binding sites on ribosomes for tRNA?

Answer 7

p site holds trna which carries growing ploypeptide chain
a site holds the trna that carries the next amino acid to be added to chain
the e site is the exit site where discharged trnas leave the ribosome