Respiration - HKALE 1994 Biology Paper I 7 HKALE 1994...

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Biochemistry
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Chapter 27 / Exercise 2
Biochemistry
Garrett/Grisham
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HKALE 1994 Biology Paper I.......................................................................................7HKALE 1994 Biology Paper II......................................................................................8HKALE 1996 Biology Paper I.......................................................................................9HKALE 1994 Biology Paper I.....................................................................................26HKALE 1994 Biology Paper II....................................................................................27HKALE 1996 Biology Paper I.....................................................................................30
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Biochemistry
The document you are viewing contains questions related to this textbook.
Chapter 27 / Exercise 2
Biochemistry
Garrett/Grisham
Expert Verified
QuestionsQuestionsHKALE 1989 Biology Paper IIHKALE 1989 Biology Paper II4.(a)Define the term respiratory quotient.(2 marks)(b)What information about the metabolism of an organism can be deduced from the values of the respiratory quotient ?(4 marks)(c)Give an account of the various means by which oxygen and carbon dioxide are transported in the blood of a mammal. Indicate also their relative importance to the total carrying capacity of blood for oxygen and carbon dioxide.(7 marks)(d)Give an account of the factors that exist under physiological conditions to favour(i)the release of oxygen from blood at the level of the tissue, and(ii)the release of carbon dioxide from blood in the lungs.(7 marks)Suggested Solution…
HKALE 1990 Biology Paper IIHKALE 1990 Biology Paper II1.(a)What is oxygen debt ? Explain its physiological significance.(5 marks)(b)Explain the effect of an increase in surrounding temperature from 20to 30onthe respiration rate of a named terrestrial ectotherm.(4 marks)(c)Explain why aquatic ectotherms using gills for gaseous exchange may be more affected than terrestrial ectotherms by the same increase in surrounding temperature.(2 marks)(d)Describe how a change in the concentrations of carbon dioxide and oxygen in the inspired air can affect the rate and depth of breathing in man.(4 marks)(e)With reference to the graph below, explain the relative positions of the three oxygen dissociation curves in relation to the size of the respective animals.(5 marks)Suggested Solution…
HKALE 1991 Biology Paper I4.By means of a flow diagram, briefly outline the three main stages of aerobic respiration with a carbohydrate substrate. Annotate your diagram to show the essential features of each of the three main stages.(N.B. Chemical formulae of individual compounds are NOT required .)(7 marks)Suggested Solution…
HKALE 1992 Biology Paper IHKALE 1992 Biology Paper I10.The ability of cells to synthesize ATP from ADP and inorganic phosphate is coupled with the oxidation of substrates by oxygen.(a)In an experiment to study the effect of potassium cyanide (KCN) on the respiration of yeast cells, 4 tubes (with contents as shown in the table below) were prepared and the corresponding rates of oxygen uptake were measured.Tube No.Volume of substances added (ml)Rate ofoxygen uptake(arbitrary units)Buffered yeast suspension2M glucose solution0.1M KCN solution12.00006.122.000.01017.832.000.010.016.742.000.010.022.2(i)Calculate the final concentrations (in moles per litre) of the following substances in tube 3 :(1)glucose(2)KCN(3 marks)(ii)Why was respiration observed in tube 1 even in the absence of added glucose ? What was the result of adding glucose to tube 2 ?(2 marks)(iii)What can you conclude about the effect of KCN on the respiration rate of yeast cells ?(2 marks)

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