Experience the Quality With Free PAX Exam Questions That Helps Candidates Pass

Lysosomes contain hydrolytic enzymes that degrade waste, damaged organelles, and ingested substances. Therefore, A is correct. The nucleus stores genetic material, ribosomes synthesize proteins, and the endoplasmic reticulum (rough or smooth) handles protein/lipid synthesis and transport. On PAX, cell biology fundamentals are frequently tested. A mnemonic: “Lysosome = Lysol = cleaning,” linking the function of breaking down waste. Knowledge of organelles ensures success on broader questions involving metabolism and disease.

Divide total pencils by pencils per box: 56 ÷ 8 = 7. Option B is correct. On PAX, word problems often require converting real-world scenarios into division or multiplication.

The first five prime numbers are 2, 3, 5, 7, 11. Sum = 2 + 3 + 5 + 7 + 11 = 28. Correct answer is D (28). Option C (26) often comes from miscounting primes. On PAX, knowing small primes is useful for quick calculations.

A chemical change produces a new substance with different properties. Iron rusting forms iron oxide through reaction with oxygen and moisture, which alters chemical composition. Options A and B are physical changes—phase transitions from solid to liquid and liquid to gas. Option D is a physical process; sugar molecules disperse but do not chemically transform. On the PAX, distinguishing between physical and chemical changes is essential. Clues include gas formation, color change, precipitate formation, or energy release. Memorizing common examples (burning, rusting, digestion) is useful.

Carbon dioxide is produced as cells metabolize glucose and is exhaled. Oxygen is inhaled, nitrogen is inert, hydrogen is not significant in respiration. On PAX, respiration basics are core science knowledge.