The feet that DNA is a nucleic acid is stated in the first sentence. Answers A, B, and D are all incorrect details.

Lawn mowers and outboard engines are two-cycle. They are used wherever horsepower is needed in a lightweight package. They run very fast in order to produce power. Four-cycle engines are used in automobiles, where various conditions exist and load variations are greater. One exception is the rotary or Wankel engine, which uses a rotary design tC.nvert pressure into rotating motion instead of using reciprocating pistons.