Search found 12 matches

by georgina009
Mon Mar 17, 2008 6:09 am
Forum: Genetics
Topic: Genetic problem - desperately need help
Replies: 1
Views: 1792

Genetic problem - desperately need help

Can anyone help me with this question? I am very confused! In corn- coloured kernal - R colurless - r green plant colour - Y yellow plant colour - y The R and Y genes are linked. Two different plants (1 and 2) that were heterozygous for each trait - RrYy - were test crossed to plants that were homoz...
by georgina009
Mon Mar 17, 2008 5:35 am
Forum: Molecular Biology
Topic: Can anyone help with this RNA question
Replies: 5
Views: 6655

edit - the pribnow box is nucleotides 198-203
by georgina009
Mon Mar 17, 2008 5:34 am
Forum: Molecular Biology
Topic: Can anyone help with this RNA question
Replies: 5
Views: 6655

Re: Can anyone help with this RNA question

Sorry I only wrote a short bit. I found an area of TTGACA but it is nucleotides 86-91 and the start codon is 226. Then what i think is the pribnow box is CATAAT which is nucleotides 198-123. So i guess what I really what to know is: is the TTGACA got anything to do with it so that if it were removed...
by georgina009
Wed Mar 12, 2008 11:18 pm
Forum: Molecular Biology
Topic: Can anyone help with this RNA question
Replies: 5
Views: 6655

thanks for the help. So is the shine dalgarno sequence likly to be what i said? (GAGGA)
by georgina009
Wed Mar 12, 2008 11:15 pm
Forum: Molecular Biology
Topic: Shine dalgarno sequence
Replies: 6
Views: 5617

I know the role but that dosent answer my question
by georgina009
Wed Mar 12, 2008 12:07 am
Forum: Molecular Biology
Topic: Shine dalgarno sequence
Replies: 6
Views: 5617

Shine dalgarno sequence

In a E. coli mRna strand what would happen if the shine dalgarno sequence was removed? Would mRNA still be transcribed from the gene? Would protein still be translated?
by georgina009
Wed Mar 12, 2008 12:06 am
Forum: Molecular Biology
Topic: mRNA?
Replies: 1
Views: 1197

mRNA?

If nucleotides outside the coding region (in between the start and stop codons) are removed then will there be any effect on the amount of mRNA transcribed or the amount of protein translated from the mRNA?
by georgina009
Wed Mar 12, 2008 12:04 am
Forum: Molecular Biology
Topic: Can anyone help with this RNA question
Replies: 5
Views: 6655

Can anyone help with this RNA question

i was given a strand of E. coli mRna and I can't figure out where the promoter and pribnow box are. It looks like this: TACTCCACAT AATTGTCCTT CTTTTTAGAG GAAAAATG So it ends in the start codon and the Shine dalgarno sequence is GAGGA (I think, correct me if I'm wrong) but where is the promoter and pr...
by georgina009
Mon Mar 10, 2008 2:19 am
Forum: Molecular Biology
Topic: tRNA help
Replies: 1
Views: 1105

tRNA help

What is the function of tRNA? why are there loads of different tRNAs more than different amino acids but less than number of codons?
by georgina009
Mon Mar 10, 2008 2:18 am
Forum: Molecular Biology
Topic: mRNA help
Replies: 1
Views: 2091

mRNA help

If I had a sequence given to me what would happen if the shine dalgano sequence before the start codon in the mRNA was replaced with CTTTCCCTT? Will the no. of molecules in the mRNA transcribed be increased or decreased? What about the size of the mRNA molecule or the protein translated from the mRN...
by georgina009
Mon Mar 10, 2008 2:16 am
Forum: Molecular Biology
Topic: RNA nucleotides question
Replies: 1
Views: 1417

RNA nucleotides question

Ok I have the following strand - CTTTTTAGAGGAAAA ATG CTA ATT TTT TCT CCC CTT TAC GAA ATT CTA ATA GTA AAA AAC CAC TTC ..... I have separated the protein coding parts to make it easier. So The first chunk part - is that the Shine dalgarno sequence? Also If the GTA is taken out what will happen to the ...
by georgina009
Mon Mar 10, 2008 2:12 am
Forum: Genetics
Topic: Genetics problem help
Replies: 1
Views: 2170

Genetics problem help

I have been given a problem to do with crosses and stuff. I have done it but i got a weird answer so I wonder if you could help me: C - coloured feathers I - blocks expression of C c - white feathers i - dosent block C Leghorn chicken - CCII Wyandotte - ccii Qn - What propotion of the F2 progeny obt...