Which of the following is NOT descriptive of both DNA and RNA? made up of nucleotides

forms a double-helix

contains four different types of nitrogen bases

has backbone made up of a sugar and phosphate

forms a double-helix

Explanation:

DNA is double stranded while RNA is single stranded

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before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

the answer is c a tornado