What is deoxyr bonuclec acid or DNA? A Adouble heix of nucleotboles, chemical compounds composed of sugar and phosphate molecules along with the bases thymine, adenine, guanine and cytosine B. A double helix of nucleotides, chemical compounds composed of sugar and phosphate molecules along with the bases quanine, uracil adenine and cytosine C A single helix of nucleotides, chemical compounds composed of sugar and phosphate molecules along with the bases thymine, adenine, guanine, and cytosine D. A single helix of nucleotides, chemical compounds composed of sugar and phosphate molecules along with the bases

## Step 1<br />Deoxyribonucleic acid, or DNA, is a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses. It is a double helix of nucleotides, which are chemical compounds composed of sugar and phosphate molecules along with the bases thymine, adenine, guanine, and cytosine.<br /><br />## Step 2<br />Option A correctly describes DNA as a double helix of nucleotides composed of sugar and phosphate molecules along with the bases thymine, adenine, guanine, and cytosine.<br /><br />## Step 3<br />Option B is incorrect because it mentions "quanine" instead of "guanine" and "uracil" instead of "thymine". Uracil is a base found in RNA, not DNA.<br /><br />## Step 4<br />Option C is incorrect because DNA is a double helix, not a single helix.<br /><br />## Step 5<br />Option D is incomplete and does not provide a full description of DNA.