Assuming that a tRNAâs anticodon contains only A,U,G & C, and no modified nucleotides, what is the minimum number of tRNAs needed to decode all the serine codons? 2 1 5 3 4

answer

watching

175

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

Jean KeelingLv2

18 Mar 2019

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

Related questions

using wobble rules to answer thequestions

a) If glutamic acid is coded by two codons if a cell has onlyone glutamyl tRNA what anticodon would it contain?

b) If isoleucine is coded for by three codons. and If the cellhas only one isoleucyl tRNA , what anticodon would it contain?

c) Leucine is coded for by six codons . what is the smallesttRNAs that can decode for leuine?

d) and if mRNA was composed of six different nucleotides howshourt could a codon be then?

plumalligator920

using wobble rules to answer thequestions

a) If glutamic acid is coded by two codons if a cell has onlyone glutamyl tRNA what anticodon would it contain?

b) If isoleucine is coded for by three codons. and If the cellhas only one isoleucyl tRNA , what anticodon would it contain?

c) Leucine is coded for by six codons . what is the smallesttRNAs that can decode for leuine?

d) and if mRNA was composed ofsix different nucleotides how shourt could a codon bethen?

lilacscorpion407

A single base substitution in the anticodon loop of one of thetRNAs for glutamic acid (tRNAglu) can hypothetically generate amutant tRNA that is able to suppress translational termination bycausing insertion of a glutamic acid residue at certain terminationcodons. Such mutant tRNAs are in fact encountered in nature and arereferred to as suppressor tRNAs. Assume that there are two tRNAgenes for glutamic acid (so that this hypothetical mutation wouldnot be lethal) and that one of these tRNAs acquires a single basemutation in its anticodon loop. Assume also that this tRNA has a Uresidue at the wobble position (and can therefore base pair withboth Glu codons) and that the mutation does NOT occur at thiswobble position.

A) What is the nucleotide sequence of the wildtype anticodon oftRNAglu (5â?3â polarity) and what is the mutant sequence that wouldhave the properties described above?

Wt sequence:

Mutant sequence:

B) At which stop codons would the mutant tRNAglu be able tosuppress translational termination? (assume that G-U base pairingis possible at the wobble position)

C) Mutations of the sort described above are rarely encountered innature, due in part to the existence of a key step in the chain ofevents that helps ensure translational fidelity. What is this stepand how might it prevent suppressor tRNAs from being able toincorporate amino acids at stop codons?