ER Flashcards
(16 cards)
Describe the role of oxygen in aerobic respiration. (3)
Q. The pH of the blood of an athlete decreases during a race and returns to normal
after the race. The decrease in the pH of the blood is caused by the presence of
waste products that have been excreted by cells during respiration.
Name the waste products that are excreted, and describe what happens to these
products to help return normal levels. (5)
Q. Explain the consequences to a mitochondrion if the water potential of the liquid in
the dishes is higher than the water potential of the mitochondrial matrix. (2)
Q. Explain the role of the inner mitochondrial membrane (cristae) in chemiosmosis.
(4)
Q. (a) Describe the features of ATP that make it suitable as universal energy
currency. (3-6)
Q. State how glucose and oxygen demands differ in normal and cancer cells. (2)
Q. Outline the role of NAD in respiration in aerobic conditions. (4)
Q. Outline the process of glycolysis in a mammal. [6 marks]
Q. Some parasitic worms, such as tapeworms, live in a mammalian gut where there
is no oxygen. Suggest how a tapeworm produces ATP in this environment. [5 marks]
Q. Outline the roles of NAD in the cytoplasm of a cell. [2 marks]
Q. Explain why lipids have higher energy value than carbohydrates. [3 marks]
Q. Describe the role of coenzyme A in respiration. [3 marks]
Q. Compare respiration in anaerobic conditions in mammalian tissues and yeast
cells. (8)
Q. Suggest why ATP is needed for protein synthesis. (2)
Q. Explain why the link reaction only occurs when oxygen is available. (4)
Q. The first part of glycolysis uses ATP. Explain why it is needed. (2)
