DAT Practice Test (Survey of Natural Sciences) 3 — Questions and Answers
Question 1: Which gas law states that volume is inversely proportional to pressure at constant temperature?
- Boyle's law (Correct answer)
- Charles's law
- Avogadro's law
- Dalton's law
Correct answer: Boyle's law
Boyle's law relates pressure and volume inversely at fixed temperature.
Question 2: Enzymes increase reaction rates primarily by doing what?
- Lowering activation energy (Correct answer)
- Increasing temperature
- Adding reactants
- Changing equilibrium
Correct answer: Lowering activation energy
Enzymes are catalysts that lower the activation energy of reactions.
Question 3: Which blood vessels carry oxygenated blood away from the heart to the body?
- Arteries (Correct answer)
- Veins
- Capillaries
- Venules
Correct answer: Arteries
Systemic arteries carry oxygen-rich blood from the heart to tissues.
Question 4: What is the oxidation state of sulfur in sulfuric acid (H2SO4)?
- +6 (Correct answer)
- +4
- +2
- -2
Correct answer: +6
With H at +1 and O at -2, sulfur must be +6 to balance the neutral molecule.
Question 5: Which structure in plant cells is responsible for photosynthesis?
- Chloroplast (Correct answer)
- Mitochondrion
- Vacuole
- Nucleus
Correct answer: Chloroplast
Chloroplasts contain chlorophyll and carry out photosynthesis.
Question 6: A solution with a pH of 3 is best described as:
- Acidic (Correct answer)
- Neutral
- Basic
- Amphoteric
Correct answer: Acidic
A pH below 7 indicates an acidic solution.
Question 7: Which type of RNA carries amino acids to the ribosome during translation?
- tRNA (Correct answer)
- mRNA
- rRNA
- snRNA
Correct answer: tRNA
Transfer RNA delivers amino acids matching the mRNA codons.
DAT Practice Test (Survey of Natural Sciences) 3
Which gas law states that volume is inversely proportional to pressure at constant temperature?