Difference between DNA and chromosomes?Watch
(smaller end) genes are in --> DNA, are in --> Chromosomes (larger end)[/QUOTE
Could you also clear this up for me please- in my book it says the genetic code is a triplet code where three nucleotide bases code for an amino acid, and then it says there are four bases pranged in groups of three?
Could you also clear this up for me please- in my book it says the genetic code is a triplet code where three nucleotide bases code for an amino acid, and then it says there are four bases pranged in groups of three?[/QUOTE]
I'll try the best I can. Your definition of a genetic code is correct, a triplet code is 3 bases that codes for one amino acid, ie AUG = Methionine, but I've never heard of four bases pranged in groups of 3 I'm afraid, I'm on OCR A2 so if you're doing the same let me know as I may need to learn it for the exam
Another analogy: DNA is a piece of string, a chromosome is the ball of string.
As for the base pairs: in DNA (specifically "DNA", not "RNA"), there are 4 bases: A, T, C and G. They line up in a string (i.e. a stand of DNA), something like AAGCGGCAAATTGCACGTGACTA... etc. (I just made that sequence up, it's not important).
They get "read" in groups of three, each group of three codes for a specific amino acid (and the many amino acids together will make a protein).
(FYI, RNA also has 4 bases, but one of them is different. Also note that the bases of DNA and RNA don't line up on their own, but in "base pairs"... don't know if you're interested in knowing that so I won't go into it).
Chromosomes carry genes, which are made from DNA.