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Class 12 Biology — Chapter 7: Human Health and Disease
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 12 Biology, Chapter 7 (Human Health and Disease). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
Malaria is caused by:
A.Plasmodium (protozoan)✓ correct
B.Bacteria
C.Virus
D.Fungus
Why
Transmitted by Anopheles mosquito.
Q2Medium
Pneumonia is caused by:
A.Streptococcus pneumoniae✓ correct
B.HIV
C.Plasmodium
D.Plant fungus
Why
Bacterial infection of lungs.
Q3Hard
HIV preferentially infects:
A.CD4 T-helper cells✓ correct
B.RBCs
C.Platelets
D.Bones
Why
Weakens cell-mediated immunity.
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