IB Biology Practice Test 15
10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
IB Biology Practice Test 15Tutor mode
Question 1 of 10
Continuity and changeResearchers compared 8 adults without diabetes and 8 adults with type 2 diabetes (independent variable). After an overnight fast of 10 hours, each volunteer drank 75 g of glucose dissolved in 300 cm³ of water and then rested. Blood samples were taken before the drink (0 min) and every 30 minutes for 2 hours, and blood glucose and insulin concentrations were measured (dependent variables).
| Time / min | Glucose, without diabetes / mmol dm⁻³ | Glucose, type 2 diabetes / mmol dm⁻³ | Insulin, without diabetes / pmol dm⁻³ | Insulin, type 2 diabetes / pmol dm⁻³ |
|---|---|---|---|---|
| 0 | 4.8 ± 0.4 | 7.6 ± 0.9 | 45 ± 12 | 110 ± 35 |
| 30 | 7.9 ± 0.9 | 12.1 ± 1.4 | 310 ± 70 | 260 ± 90 |
| 60 | 6.6 ± 0.8 | 14.3 ± 1.6 | 240 ± 60 | 380 ± 110 |
| 90 | 5.6 ± 0.6 | 13.8 ± 1.7 | 140 ± 40 | 420 ± 120 |
| 120 | 5.0 ± 0.5 | 12.6 ± 1.5 | 70 ± 20 | 390 ± 110 |
Which row gives the time and value of the highest mean blood glucose concentration in the group with type 2 diabetes?