when people in a lab test blood to get dna out of it what do they look for? like, what in the blood carry DNA?
2007-03-12 05:43:57 · 4 answers · asked by xbox 360 1 in Science & Mathematics ➔ Biology
Blood has three cellular components: red blood cells, white blood cells and platelets. Only the white cells are complete cells with nuclei and DNA. These three elements are typically separated when blood is processed, by gradient centrifugation in Ficoll. After centrifugation, it is possible to distinguish a layer of clear fluid (the plasma), a layer of red fluid containing most of the red blood cells, and a thin layer in between, the buffy coat (so-called because it is usually buff in hue), with most of the white blood cells and platelets. The buffy coat is used to extract the DNA.
By the way, DNA is NOT composed of aminoacids (as melissa B said), but of nucleotides bound together by phosphodiester bonds.
2007-03-12 06:57:57 · answer #1 · answered by Jesus is my Savior 7 · 1⤊ 0⤋
DNA is formed from amino acids that link together. How these amino acids link together is what gives your "blue print" so to speak. Midrocondria in your cells also contain DNA. That DNA is different and it is the DNA for your cells. Confusing right.
2007-03-12 06:01:04 · answer #2 · answered by Melissa B 2 · 0⤊ 4⤋
the white blood cells (have nucleus)
2007-03-12 06:19:36 · answer #3 · answered by the vet 4 · 2⤊ 0⤋
they take cells usualy from the mouth ,but if they cant they use cells in the blood
2007-03-12 05:53:14 · answer #4 · answered by raindovewmn41 6 · 0⤊ 1⤋