1. Both DNA and RNA are nucleic acids. How are they structurally different? 2. DNA can be viewed as a "twisted ladder." What molecules of the DNA would form the sides of the ladder? What molecules would form the rungs of the ladder? 3. The DNA double helix is said to be "antiparallel." What does that mean? 4. If one strand of DNA has the sequence 5 ATCCGGAATT 3 , what is the orientation and sequence of the other strand? 5. What types of bonds hold the two strands of DNA together? How many of these bonds occur between the twro types of base pairs that form? .