The structure of DNA is called a double helix because DNA is made up of two strands of nucleotides wound together in a spiral.
DNA has two strands that run opposite of each other and twist together much like a twisted ladder. Each backbone of the ladder is made up of alternating groups of sugar and phosphate groups.
Well it surely isn't nuclear, or electrical. It's not radiant either.. So the only answer is chemical.
B.
All dentist equipment is used in the mouth. Many deseases, bacteria and viruses are transmitted trough saliva, and not all of these are weak. So, that is why we clean the dental operatory, to lower the chances of transmitting anything.
Hope it helped,
BioTeacher101
Red Blood Cells transport oxygen through the body. Some things that can affect blood flow are constriction of blood vessels, drugs, caffine, and some heart diseases. Interactions between Red Blood Cells and other important molecules, cells, and organs.
