BMAT Knowledge 3 — Questions and Answers
Question 1: Which process converts glucose to pyruvate and produces a net gain of 2 ATP molecules?
- Krebs cycle
- Glycolysis (Correct answer)
- Oxidative phosphorylation
- Beta-oxidation
Correct answer: Glycolysis
Glycolysis occurs in the cytoplasm and yields a net gain of 2 ATP per glucose molecule.
Question 2: What is the empirical formula of a compound containing 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?
- C₂H₄O₂
- CH₂O (Correct answer)
- C₂H₂O
- CH₄O
Correct answer: CH₂O
Dividing percentages by atomic masses gives C:H:O ratio of 3.33:6.7:3.33 = 1:2:1, so CH₂O.
Question 3: A wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is its speed?
- 0.00136 m/s
- 735 m/s
- 340 m/s (Correct answer)
- 500 m/s
Correct answer: 340 m/s
Wave speed = frequency × wavelength = 500 × 0.68 = 340 m/s.
Question 4: Which blood vessel carries oxygenated blood from the lungs to the heart?
- Pulmonary artery
- Pulmonary vein (Correct answer)
- Aorta
- Vena cava
Correct answer: Pulmonary vein
The pulmonary vein is unique among veins in carrying oxygenated blood from the lungs to the left atrium.
Question 5: When 2 mol of sodium reacts with water, how many moles of hydrogen gas are produced?
- 0.5 mol
- 1 mol (Correct answer)
- 2 mol
- 4 mol
Correct answer: 1 mol
The reaction 2Na + 2H₂O → 2NaOH + H₂ shows that 2 mol Na produces 1 mol H₂.
Question 6: An object of mass 5 kg is accelerated at 3 m/s². What net force acts on it?
- 1.67 N
- 8 N
- 15 N (Correct answer)
- 0.6 N
Correct answer: 15 N
By Newton's second law, F = ma = 5 × 3 = 15 N.
Question 7: Which organelle contains its own DNA and is responsible for aerobic respiration in eukaryotic cells?
- Nucleus
- Chloroplast
- Mitochondrion (Correct answer)
- Ribosome
Correct answer: Mitochondrion
Mitochondria contain their own circular DNA and carry out aerobic respiration to produce ATP.
BMAT Knowledge 3
Which process converts glucose to pyruvate and produces a net gain of 2 ATP molecules?