Question

The decreased metabolic rate during ageing is mainly caused due to

• A. Reduced DNA replication
• B. Decrease in the number of mitochondria
• C. Drying of skin
• D. Both A and B

Answer 1

The correct option is D Both A and B

• Ageing is a complex process that varies as to how it affects different people and even different organs. Most gerontologists (people who study aging) feel that aging is due to the interaction of many lifelong influences. These influences include heredity, environment, culture, diet, exercise and leisure, past illnesses, and many other factors.
• The decreased metabolic rate during ageing is mainly caused due to Reduced DNA replication and Decrease in the number of mitochondria.
  
• So, the correct answer is 'Both A and B'.