If the sequence of nucleotides in one chain of DNA molecule is T-C-A-A-G-C......................

If the sequence of nucleotides in one chain of DNA molecule is T-C-A-A-G-C, a new nucleotide chain will be produced during replication with the complementary sequence:


a. T-C-A-A-G-C


b. A-G-T-T-C-G


c. C-T-G-G-A-T


d. G-A-C-C-T-A





























please help me with this. please explain to me how you got it in a short summary. Oh, and tell me the answer too.





for example: a. T-C-A-A-G-C





because sometimes people explain to me how they got the answer, but they never tell me what the answer is.





THANKS TO EVERONE THAT PUT SOME EFFORT INTO THIS QUESTION AND TOOK THE TIME TO HELP ME OUT.

If the sequence of nucleotides in one chain of DNA molecule is T-C-A-A-G-C......................
Remember that the 2 complimentary strands are antiparallel. That is to say that the 2 strands although complimentary run in opposite directions.





It's useful to assign an order to the strand by referring to the directon of the strand. This is generally done by writing 5' in front of the sequence, in this case TCAAGC, thus 5' TCAAGC.....


The 5' refers to the position at which the Phosphate group is attached to the ribose component of the DNA molecule.





So the answer to your question of what is the complimentary sequence to 5' TCAAGC....? It's 5' ......GCTTGA. (the answer you have for letter "b" written backwords.
Reply:Match the AT and CG. I tell my students to match the letters with straight lines (A T) and to match the letters with curves (C G). And this is so easy that you can get your own answer.
Reply:remember your letters





A : T


C : G





so simply replace the original nucleotides with their opposites:





original = T C A A G C


complimentary = A G T T C G





I would look up the differrences between the nucleotides - this may explain why they need to match up this way.