Quickest Way To Get A Gift To My...
ChatterBank4 mins ago
biology genetics
3 Answers
im doing a practice paper of AS level foundation and need help with a question. it reads "an enzyme such as amylase, has a specific 3 dimensional shape. explain how dna structure determines the specific shape of enzymes."
its worth 4 marks.
thanks ever so much xx
its worth 4 marks.
thanks ever so much xx
Answers
1 to 3 of 3
Best Answer
No best answer has yet been selected by sarahduggan. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.
I don't think it's DNA structures that does - just the order of nucleotides. That order determines the order of amino acids (based on the triplet code), and the order of amino acids determines things like hydrophobic interactions and bonding between the amino acids (which form hydrogen bonds, ionic bonds, disulfide bridges, etc.) and that's how you get the ultimate 3-D shape of the polypeptide, which is critical to its function.
hmm quite a good q
the a has changed over 25 years.
the view used to be the the amino acids were churned out and took up the lowest energy configuration [Thermo dynamic view ] When insulin was synthesized, it had 1% activity and everyone shrugged their shoulders
Now there are said to scaffolding proteins (rather after my time I am afraid)
Dna will specify uncharged charged and hydrophlic and lipophilic amino acids, and the charges will tend to segregate, hydrophobic aa turn in and hydrophilic aa turn out
so list the aa which are + charged and state that the DNA here will tend to have the aa separate as far as poss
and then do the same for the - charged
list the hydrophilic and say they're on the outside
and the hydrophobic and say they are on the inside
onemark for ea sentence ?
Protein synth does not occur inn the nucleus so DNA having a scaffoldinng function seems unlikely
Good luck
oh and can you post the answer when it comes ?
the a has changed over 25 years.
the view used to be the the amino acids were churned out and took up the lowest energy configuration [Thermo dynamic view ] When insulin was synthesized, it had 1% activity and everyone shrugged their shoulders
Now there are said to scaffolding proteins (rather after my time I am afraid)
Dna will specify uncharged charged and hydrophlic and lipophilic amino acids, and the charges will tend to segregate, hydrophobic aa turn in and hydrophilic aa turn out
so list the aa which are + charged and state that the DNA here will tend to have the aa separate as far as poss
and then do the same for the - charged
list the hydrophilic and say they're on the outside
and the hydrophobic and say they are on the inside
onemark for ea sentence ?
Protein synth does not occur inn the nucleus so DNA having a scaffoldinng function seems unlikely
Good luck
oh and can you post the answer when it comes ?
im doing A2 bio, and i think you need to talk about dna as a protein, it has a tertiary structure, i.e. 3D structure, but DNA codes for the production of enzymes, i,e, proteins also, so DNA codes for the formation of a certain enzyme such as amylase, cos the code is translated usinf mRNA and tRNA to form the amino acid, (protein)
1 to 3 of 3
