Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

Answer:
The Role are free radicals believed to play in AD are explained below in details.
Explanation:
There is a growing indication that free radical-produced oxidative loss may perform a function in the pathogenesis of Alzheimer's disease. Free radicals are reactive oxygen composites that may strike and break proteins, lipids, and DNA. ... Antioxidants such as vitamin E display encouragement that they may benefit in managing the disease.
The appropriate answer is 3. Fats. Fat is a triglyceride molecule. Collectively fats form a type of tissue known as adipose tissue. The primary function of fat is energy storage but when concentrated in adipose tissue it provides thermal insulation and also doubles as a shock absorber for vital organs in the body.
Nucleic acids transmits genetic information and is used in cellular activities such as protein synthesis. Carbohydrates when broken down provides heat but are not involved in insulating the body.