Is that a test your taking?
In photosynthesis o2 is released while in cellular respiration o2 is taken.
Photosynthesis occur in the presence of sunlight while cellular respiration has no boundations
Both require o2.
Both leads to the formation of new substance.
Answer:
I believe that the correct answer is in fact B
The shape of the DNA molecule is called a double helix.
This is because the structure has four main chemicals that join together in specific patterns that looks like a double helix.
Hope this helps :))