Zoology-AIDS
NEET Zoology AIDS MCQ Question
Type: MCQ-numerical-Easy-Class 12
If an HIV-infected person has a progressive decrease in helper T-lymphocytes from 500 cells/µL to 200 cells/µL over a period of 5 years, what is the average annual decrease in the number of these cells?
A
60 cells/µL per year
B
100 cells/µL per year
C
200 cells/µL per year
D
20 cells/µL per year
Correct Answer
Option A
Detailed Explanation
The decrease in helper T-lymphocytes is from 500 to 200 cells/µL, which is a total decrease of 300 cells/µL over 5 years. The average annual decrease is 300 cells/µL divided by 5 years, which equals 60 cells/µL per year.
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