5090/12 Biology Oct Nov 2021 Quiz | Cambridge O-Level MCQ
Cambridge
O-Level
Biology (5090)
دی
2021
مشاهده نمونه سوال
شامل مباحث:
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
zivar sushu Human immunodeficiency virus (HIV) affects the immune system resulting in decreased lymphocyte numbers.
The diagnosis of AIDS can be made when lymphocyte numbers decrease below 200 cells /mm$^3$ of blood.
The graph shows the lymphocyte numbers after HIV infection in a patient.
How many years after infection would this patient be diagnosed with AIDS?
