IB DP Biology Mock Exam SL Paper 1A Set 1 - 2025 Syllabus
IB DP Biology Mock Exam SL Paper 1A Set 1
Prepare for the IB DP Biology Exam with our comprehensive IB DP Biology Exam Mock Exam SL Paper 1A Set 1. Test your knowledge and understanding of key concepts with challenging questions covering all essential topics. Identify areas for improvement and boost your confidence for the real exam
Question
A cell contains chloroplasts, plasma membrane and 80S ribosomes. What type of cell could it be?
A. Bryophyte
B. Lymphocyte
C. Prokaryote
D. Neuron
Answer/Explanation
Question
More than 90% of cellular cholesterol is located in the cell’s plasma membrane. What is the
main role of cholesterol in the plasma membranes of mammalian cells?
A. To regulate membrane fluidity
B. To increase membrane solubility
C. To increase membrane permeability
D. To regulate membrane temperature
Answer/Explanation
Question
What is/are required for facilitated diffusion?
I. A concentration gradient
II. ATP
III. A channel protein
A. I only
B. I and III only
C. II and III only
D. I, II and III
Answer/Explanation
Question
Cell metabolism involves anabolic and catabolic reactions. Which process directly involves
anabolism?
A. Active transport of ions
B. Release of energy from glucose
C. Production of intracellular enzymes
D. Breakdown of worn-out cell organelles by lysosomes