Question

activator~ 2 min
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look at the image to answer the following.

1. what are the 4 nitrogenous bases?
2. dna has ___ strands/sides.
3. dna has a double ____ shape.

Explanation:

1. DNA's nitrogenous bases are adenine (A), cytosine (C), guanine (G), and thymine (T).
2. DNA is a double - stranded molecule.
3. DNA has a double - helix shape.

Answer:

1. Adenine, cytosine, guanine, thymine
2. two
3. helix