what functions and properties do you need to consider when determine when determining the shape and structure of a DNA model

That would be a working theory.

No they’ve not done that

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature

Oh dog