Question 3
How does the structure of DNA determine the structure of RNA?

The nucleotide sequence of DNA determines the nucleotide sequence of RNA and the nucleotide sequence is pretty much the structure of DNA. This happens because DNA has the genetic information on how to create the structure.

Explanation:

DNA is double stranded, but RNA is typically single stranded. if it is single stranded, RNA can fold upon itself, with the folds stabilized by short areas of complementary base pairing in the molecule, forming a 3D structure.

Explanation:

i believe the answer is c

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.