2 marksThe following statements all relate to cellular respiration.
- Cellular respiration is also called ventilation
- It is a series of chemical reactions that usually requires oxygen to break down a respiratory substrate
- Cellular respiration produces energy in the form of ATP
- Cellular respiration occurs in the cytoplasm and mitochondria of cells
Which of the statements are correct?
(1)
| ☐ | A | I, II and IV | |
| ☐ | B | II and III | |
| ☐ | C | II and IV | |
| ☐ | D | II, III and IV |
Which of the following processes does not require ATP?
(1)
| ☐ | A | Protein synthesis | |
| ☐ | B | Osmosis | |
| ☐ | C | Active transport of ions | |
| ☐ | D | Muscle contractions |
2 marksThe following apparatus was set up to measure the rate of aerobic respiration by a student.
Identify solution X and state its function within the experiment.
3 marksThe student monitors the movement of the water droplet over time.
Draw an arrow on the diagram at part (b) to show the direction of movement of the water droplet.
(1)
Explain the movement of the water droplet.
(2)
3 marksThe student found the water droplet had moved by 2 cm in 24 hours. The diameter of the lumen of the tube is 1 mm.
The volume of the tubing is given by the equation πr²l.
Use the value of 3.14 to represent π and note that l refers to the length.
Use the equation to calculate the volume of gas produced in cm³ hour⁻¹ and give your answer in standard form.
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