CHAPTER 12-RESPIRATION🤎

Question 1

*Explain three reasons why living organisms need energy, give examples where necessary

Answer 1

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Question 2

*Describe three features of ATP that make it suitable to be the universal energy currency

Answer 2

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Question 3

Describe the structure of ATP for three marks (AS level recap)

Answer 3

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Question 4

Explain how AMP is formed from ATP including the necessary details (what occurs, type of reaction and amount of energy released)

Answer 4

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Question 5

*Summarise how ATP is synthesised in one sentence and define the two reactions involved in the synthesis of ATP

Answer 5

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Question 6

*Name the four stages of aerobic respiration and state where each stage takes place

Answer 6

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Question 7

*Summarize then explain the glycolysis stage in detail including all necessary information and keywords (at the end, refer to the movement of pyruvate)

Answer 7

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Question 8

*Using an equation, summarize then explain the link reaction in detail including all necessary information and keywords

Answer 8

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Question 9

*Using an equation, summarize then explain the Krebs cycle in detail including all necessary information and keywords (refer to decarboxylation, dehydrogenation, and reduction of coenzymes)
-Describe the role of NAD and FAD in transferring hydrogen to carriers in the inner mitochondrial membrane

Answer 9

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Question 10

*Using an equation, summarize then explain the concept of oxidative phosphorylation in detail including all necessary information and keywords

Answer 10

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Question 11

*Use the diagrams Figure 12.7 and Figure 12.8 to showcase your understanding of the four stages of aerobic respiration

Answer 11

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Question 12

Draw and label parts of a mitochondrion, describe a few features of this cell organelle (AS level recap)

Answer 12

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Question 13

*Describe the relationship between the structures and function of the mitochondria (5 marks)

Answer 13

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Question 14

*Explain why the energy yield from aerobic respiration is much greater than the energy yield from anaerobic respiration (4 marks)

Answer 14

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Question 15

*Outline the process of anaerobic respiration in mammals (lactate fermentation) including where it takes place and it’s process (use a diagram if necessary)

Answer 15

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Question 16

*Outline the process of anaerobic respiration in yeast cells (ethanol fermentation) including where it takes place and it’s process (use a diagram if necessary)

Answer 16

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Question 17

*Explain how rice plants are adapted for survival in water (4 marks)

Answer 17

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Question 18

*Explain the differences in the relative energy values of carbohydrates, lipids and proteins as respiratory substrates (4 marks)

Answer 18

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Question 19

*Define respiratory quotients (3 marks)

Answer 19

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Question 20

*Calculate the RQ value for aerobic respiration using the balanced equation

Answer 20

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Question 21

*Investigations (paper 5): Describe an investigation used to determine the effect of temperature on the rate of respiration, use diagrams if necessary (include the uses apparatus used and the procedure)

Answer 21

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Question 22

*Investigations (paper 5): Describe an investigation used to determine the RQ of germinating seeds or small invertebrates, use diagrams if necessary (include the uses apparatus used and the procedure)

Answer 22

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Question 23

*Investigations (paper 5): Describe an investigation to determine the effect of temperature and substrate concentration on the rate of respiration of yeast (redox indicators like DCPIP and methylene blue are used)

Answer 23

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