Hi there.
Sleeping pills can be affective, one common side-affects are; "slower breathing" -- slower breathing is a common factor, as a side affect. Another would be "depressed breathing".
These happen for many reasons, forcing your body to sleep isn't on the "healthy" side of your body.
Sometimes, people do get addicted to sleeping pills; and take them every night and can lead to small or major health issues. 
An unwanted pill that goes into your body every night will cause unwanted side affects. That can be very harmful!  
 
        
             
        
        
        
There is no attached table, so it could not be told precisely which of the four molecules is the DNA. But, it is known that DNA consists of deoxyribose, guanine, and phosphate. 
The base unit of DNA is called a nucleotide. The nucleotide consists of a nucleobase (adenine - A, thymine - T, cytosine - C, and <u>guanine -G</u>), a monosaccharide <u>deoxyribose</u>, and a <u>phosphate </u>group. <span>By knowing this, it is easy to choose which molecule of those is the DNA.</span>