Nicotine is a substance that is addictive in nature commonly
found in cigarette, that affect the nervous system by binding to the receptors
in the brain and other part of the body. Atherosclerosis is the loss of
elasticity or thickens of arteries walls. However, nicotine increases the
release of neurotransmitter adrenaline into the blood which subsequently cause
the development of atherosclerosis.
Proteins and nucleic acids are not similar in structure but they help each other out. There are two nucleic acids RNA and DNA. DNA is the "blueprints" so that your cells can make proteins. And the RNA assists in the making protein.