In a muscle cell, aerobic respiration of one glucose molecule produces 32 molecules of ATP. Anaerobic respiration of one glucose molecule produces 2 molecules of ATP. A group of muscle cells needs 6.4 × 104 molecules of ATP. How many more glucose molecules are needed if all of this ATP is made by anaerobic respiration instead of aerobic respiration?
2.0×1032.0 \times 10^{3}2.0×103
3.2×1043.2 \times 10^{4}3.2×104
3.0×1043.0 \times 10^{4}3.0×104
3.4×1043.4 \times 10^{4}3.4×104
113 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.