input: Write a function to check if a DNA strand is a palindrome.
  assert is_palindrome_dna("ATGCTATCG")==True
  assert is_palindrome_dna("ACGT")==False
  assert is_palindrome_dna("AATT")==True
output: def is_palindrome_dna(s):
      complement = {'A': 'T', 'T': 'A', 'C': 'G', 'G': 'C'}
      reverse_complement = ''.join(complement[base] for base in reversed(s))
      return s == reverse_complement