Multiple choice

Why are antibodies important?

  1. They act as a messenger between the innate and adaptive immune systems

  2. They activate B cells to kill infected human cells

  3. They block invading molecules from attaching to cells

  4. Both A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Antibodies are crucial because they bind specifically to foreign antigens (like viruses or toxins), neutralizing them by physically blocking them from attaching to and infecting host cells.

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