This sheet contains the official Life and Earth Sciences (SVT) and Education in Environment, Hygiene and Biotechnology (EEHB) examination from the BEPC 2023 session in Cameroon, with its detailed answer key. This recent exam paper reflects the latest pedagogical orientations of the Cameroonian curriculum and constitutes a particularly relevant preparation tool.

Part A begins with a knowledge assessment in the form of MCQs addressing key concepts: modes of reproduction of microorganisms (budding, sporulation, conjugation, binary fission), rock alteration and its physicochemical mechanisms, the inflammatory response as a non-specific immune reaction, and the concept of monosomy in chromosomal genetics. The document analysis exercise is particularly interesting: it presents the different types of grafts in mice (autograft, isograft, allograft, xenograft) and requires students to identify each case and understand the phenomena of immunological rejection.

The practical skills and attitudes section focuses on means of restoring and protecting biodiversity. The supporting text highlights an alarming fact: the rate of biodiversity loss due to human activity is 100 to 1,000 times greater than the natural extinction rate. Students must propose concrete strategies for ecosystem conservation and restoration.

Part B assesses competencies through a problem situation centered on raising awareness against prejudices related to HIV/AIDS. The case of Simsonne, a high school graduate who must undergo a health check revealing her HIV-positive status, allows for addressing discrimination, modes of virus transmission, and responsible attitudes toward this disease.

This examination mobilizes knowledge in microbiology (microorganism reproduction), immunology (grafts, inflammatory response), genetics (chromosomal abnormalities), geology (rock alteration), and health education (HIV/AIDS). The provided answer key guides students step by step in constructing structured and well-argued responses. This sheet represents an ideal training resource for mastering all SVT/EEHB topics in the BEPC curriculum.