What is a DNA nucleotide sequence??? Help please!!?

Question

Is it A (adenine), C (cytosine), T (thymine), G (guanine)??

Answer 1

All four of the items mentioned in your question (A, C, G, and T) are nucleotides.  They are lined up in many different sequences in the DNA.  Each one is bound by an additional one - A only binds to T, while C only binds to G.  Two nucleotides bound to each other form each of the rungs of a ladder, the frame is formed by a sugar (ribose) bound to phosphate.  The whole ladder is the DNA

Answer 2

A length of DNA with the base pairs arranged linearly along the double helix-

EG.

5'ATTACCGGAT3'

3'TAATGGCCTA5'

represents a short sequence of double stranded DNA.