Louey

You're a star, thank you that is such a great help, I got the mutation bit but wasn't picking up how the frameshift mutation works and it's knock on effect on the other codons.

AUG UUU GCU GGG GGA CAU UCG UGG GCA is the sequence before the addition of the T at the front/deletion of the 10th base

I'm in a quandry with a DNA sequence. I have a polypeptide that starts with the MET codon and am putting a T on the front - which in effect makes the beginning codon Thymine - and then if I start reading the codons from the Thymine it changes the whole polypeptide's sequence (resulting in there being no methionine amino acid) so does this make the polypeptide a mutant or something else? Or do I "ignore" the T as 3 of the bases still give me the MET and as Met is the codon for initiating the translation of the polypeptide? Then back to the original sequence (starting with methionine again) and have to take out the 10th base, my original sequence is AUG UUU GCU GGG GGA, taking out the 10th base gives me AUG UUU GCU GGG GAC, so the 5th amino acid is Asp instead of Gly I'm not sure what the possible final effect on the polypeptide would be! TIA for any enlightenment, this one is driving me nuts and I think I maybe looking for something a bit more complex than what it is (can't see the wood for the trees kind of thing!) Lou

I have to write about enzyme structure and how their structure allows them to fulfil their biological role. Does anyone know any good websites as while I am reading my text book it is interesting to read but I want more information rather than just an odd paragraph! TIA

yay, i think i have sussed it!

Think it is defintely Boron, my question that I am tackling is ... "The boron atom is now ionized by removing several electrons, such that it can be described as a "hydrogen-like" boron ion. I then have to state how many electrons it now contains and give the symbol for the ion. So, it is all in a muddle in my head. Does my boron atom lose 1 (though is that it is just one as that is all hydrogen has) electron and is left with 4 electrons or should it lose 4 electrons and end up with just one (and end up the same as hydrogen)!! So I have two symbols on my piece of paper B4+ion and B+1ion and a headache! It is the word "several electrons" in the question that is not helping me! I prefer biology any day!

I have a boron atom that has been ionized as several electrons have been removed and so it is now a hydrogen like boron ion. So does this mean that my boron atom that has 5 electrons has lost 1 to the hydrogen or has it lost 4 so it ends up with just 1 (ie hydrogen having just 1 electron)? I'm getting myself confused with how many it loses. For the moment I'm going with that it loses just one and I think then that the symbol for it being a boron ion should be B4+ion ? (that is a superscript 4 by the way). Have I got the knack or lost the plot? If anyone can explain this process in layman English....

reading through this is actually very helpful so thank you for continuing this thread - I've got some compounds to figure too lol

I'm doing a balanced chemical equation for the reaction that occurs when solid barium hydroxide dissolves in water. Have I done this right (sorry not yet got to grips with the subscripts so saying subn when I need to!) Ba(OH)sub2 --> Ba2OHsub2 If I have gone the wrong way can someone direct me where I have gone wrong so I can understand what I am not doing. Thank you

Thank you and finally found something that was easier to understand than what is in my text book!

Me again! Does anyone know where I can find some more info on beta-minus decay. I have a 11 over 4 Be atom and and have to write an equation for the beta-minus decay of it and show symbols for the boron isotope that is produced and for the other particles that are emitted. Want to do this one by myself but it is still a bit of gobbledegook to me - more of what symbols - 11 over 4Be then an arrow then

I've worked it (I think!) to be close to Unh - going by the 14 off of the 120 which gives me 106. Now to figure the electronic config. This keeps me occupied to say the least!!!

5. Have to give the highest empirical formula of the highest normal oxide and highest fluoride of Ul (and have to explain how I got the formula). Guess this is Ul something 0 and UlF but not sure if I should have any other numbers there. Nearly there, am I on the right track for this one, have been going over it and no further along!

Brillant, thank you. And thank you for the link, off to have a look

I have a task to do and am a bit stuck - and feeling rather thick Somewhere above atomic number 110 there is an island of stability where the atoms of elements are likely to have longer lifetimes. There is as yet an unknown element that has 120 protons and 174 newtrons, it is called utimatum and has the symbol Ul 1. I need to state the atomic number (120?) and give the full symbol for the isotope (is this 294 over 120 Ul?) 2. I have to give the Period and the Group of the periodic table where I would expect to find Ul and explain how I arrived at it (I am stuck here with the group and have it under period 7). 3. I have to name another chemilca elememt in the Periodic table that I would expect it to resemble closely (? do I look at something with the same number of protons and neutrons?) 4. I have to state and give my reasons whether I expect it be a metal, semi-metal or non-metal (? is this given away by the numbers?) 5. Have to give the highest empirical formula of the highest normal oxide and highest fluoride of Ul (and have to explain how I got the formula). Guess this is Ul something 0 and UlF but not sure if I should have any other numbers there. 6. Suppose that the isotope of Ul whose symbol I wrote in 1 above undergoes a succession of 7 a-decay reactions: (a) what isotope would be the final product of these changes? Do I remove 7 lots of something and so many protons and the figures I end up with give me another isotope?? (b) is the final product an ianthanie, actinide, a transition element of a typical element (no idea at the moment! wild guess is an actinide but this is a wild guess). Thanks in advance for any wise words of wisdom. Lou