(a) State what is meant by the term respiratory quotient (RQ).
[1]
(b) (i) Complete the following equation for the aerobic respiration of the respiratory
substrate A.
C H O + 26O + [2]
Question
Biology
CAIE2023
36 2 2
(ii) Calculate the respiratory quotient (RQ) of this respiratory substrate.
[2]
(c) Explain the significance of the different values that may be obtained of RQ.
[2]
Two respirometers were set up as shown in Fig. 1.1.
UCLES 2007 9700/4/SP07 final
PPMMTT
Question
Biology
CAIE2023
(a) The respiratory quotient (RQ) values for different respiratory substrates can be calculated.
Table 5.1 shows:
• the formulae of four respiratory substrates
• the number of oxygen molecules (O ) needed to completely respire each substrate to
Question
Biology
CAIE2023
(a) The respiratory quotient (RQ) values for different respiratory substrates can be calculated.
Table 5.1 shows:
• the formulae of four respiratory substrates
• the number of oxygen molecules (O ) needed to completely respire each substrate to