OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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Get ready for the OCR GCSE Biology exam with our comprehensive quiz, featuring flashcards and multiple choice questions. Understand the exam format, key topics, and effective study strategies to excel.

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Which of the following roles is associated with testosterone?

Encouraging muscle growth
Regulating blood sugar levels
Development of secondary sexual characteristics
Aiding in digestion

The correct answer is: Development of secondary sexual characteristics

Testosterone plays a vital role in the development of secondary sexual characteristics, which are features that emerge during puberty and distinguish the two sexes but are not directly involved in reproduction. These characteristics include the development of facial hair, a deeper voice, and increased muscle mass among males. During puberty, testosterone levels rise significantly, leading to these physical changes. While testosterone does also encourage muscle growth, it is primarily known for its role in secondary sexual characteristics, which is why this choice is the most directly associated with the hormone's functions. The regulation of blood sugar levels and aiding in digestion are roles associated with other hormones, such as insulin and digestive enzymes, rather than testosterone.