Free PAX Exam Questions That Helps Candidates Pass

“Scarce” means limited or in short supply. The opposite is “plentiful.” Options A, B, D are synonyms of scarce. On PAX, antonyms often contrast scarcity vs. abundance. Strategy: link scarce = shortage, plentiful = abundance.

Food molecules store chemical energy in bonds, released during cellular respiration. Thermal energy is heat, mechanical is motion, electrical is current. On PAX, energy types are often linked to biology.

The square root of 144 is 12 because 12 × 12 = 144. Thus, C is correct. Option A (10), B (11), and D (13) are close distractors, testing whether the student recalls perfect squares. On PAX, knowing squares up to at least 15² = 225 is helpful for quick calculation. Recognizing 144 as 12² saves time.

The nucleus stores DNA, which carries genetic information. The cytoplasm is the fluid interior, mitochondria produce ATP, and ribosomes build proteins. On PAX, cell biology is a core topic. Mnemonic: “Nucleus = library of DNA.”

Average speed = distance ÷ time = 240 ÷ 4 = 60 mph. Option C is correct. Options A, B, and D reflect common math errors in division or estimation. On PAX, distance-rate-time problems are frequent—remember formula D = RT.