Gaseous exchange and respiration questions | form five Biology

1. Diagrams A and B represent two cell organelles as seen under the electron microscope.

1. Identify the two cell organelles
2. Name the structures numbered 1-8

2. Without using diagrams, outline the processes taking place in the structures labelled 3 and 8
3. Explain briefly how organelles 1 and 2 are adapted to the functions they perform.

1. Compare photosynthetic phosphorylation and oxidative phosphorylation
2. Describe how energy in the form of ATP is formed during cyclic photophosphorylation.

1. Study the photograph below carefully

1. Giving reasons explain what happens to the breathing rate and heart beat in the men shown in the photograph.
2. Explain briefly why the muscles of these men are going to experience anaerobic respiration

2. How does anaerobic respiration differ from aerobic respiration?

1. What is glycolysis?
2. Summarise the essential features of glycolysis which lead to the release of energy froma molecule of glucose (flow chart is unnecessary).

1. Describe three (3) ways of obtaining gaseous oxygen in terrestrial flowering plants
2. Briefly explain why the oxidation of fats liberates more than double the energy of the same quantity of carbohydrate.

1. Define the term respiratory quotient
2. For each metabolic pathway listed in Table 2, name the specific location in the cell it occurs , substrates used and products formed under each.

Briefly explain how each of the following factors affect the rate of respiration :

1. Temperature
2. Size of an organism