You are presented with the question "Structures coil when, and are made of DNA and proteins?" and the following answer choices: 
- during the night
 - they bend
 - during prophase
 - during reproduction
 - an organism's body
 - solid, liquid, gas
 - during protein absorbtion
 - Veins and arteries.

Now knowing that chromosomes are coiled structures made of DNA and proteins and during prophase the chromosomes coil up, choose the best answer.


 

   during prophase      