Which immunoglobulin is most abundant in blood serum?
✓ Correct Answer: Option C
IgG is the most abundant antibody in serum (~75%), provides the majority of antibody-based immunity, and can cross the placenta.
📚 About This MCAT Exam Prep Practice Question
This 2-level MCAT Exam Prep question from the Biological & Biochemical Foundations topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free MCAT Exam Prep practice test or use flashcards for spaced repetition review.