Which of the following has been linked to obesity?

Question

Quizplus · Accepted Answer

The ob gene (short for obese gene) codes for a protein called leptin, which regulates appetite, metabolism, and body weight. Mutations in the ob gene have been linked to obesity in both animals and humans.

Answer: D 
 Leptin is a hormone produced by fat cells that helps regulate appetite and metabolism. High levels of leptin are often seen in obese individuals, but they can become resistant to its effects, leading to increased food intake and weight gain.

Choices B and C are not directly linked to obesity. Melatonin levels affect sleep patterns and circadian rhythms, while smoking habits are associated with a variety of health problems but not specifically obesity.

Which of the Following Has Been Linked to Obesity