Which of the following factors influence the control of food intake in animals?

• A. Hormonal signals such as leptin and ghrelin
• B. The number of mitochondria in muscle cells
• C. The sequence of nucleotides in tRNA
• D. The presence of lysosomes in the nucleus

Answer: (A)

Verified step by step guidance

1. Understand the context of the question: The problem is asking about factors that influence the control of food intake in animals. This is related to physiological and biochemical processes that regulate hunger and satiety.
2. Identify the relevant options: Hormonal signals such as leptin and ghrelin are directly involved in regulating food intake. Leptin is a hormone that signals satiety (feeling full), while ghrelin is a hormone that stimulates hunger.
3. Evaluate the other options: The number of mitochondria in muscle cells is related to energy production but does not directly influence food intake. Similarly, the sequence of nucleotides in tRNA and the presence of lysosomes in the nucleus are unrelated to the regulation of hunger or satiety.
4. Focus on the correct answer: Hormonal signals such as leptin and ghrelin are key regulators of food intake. These hormones interact with the brain, particularly the hypothalamus, to control appetite and energy balance.
5. Conclude the reasoning: Based on the physiological role of leptin and ghrelin, they are the correct answer as they directly influence the control of food intake in animals.