Waec Model Questions Vol1 2020 Biology Question 4

Practice essay / theory question 4 from the 2020 Waec Model Questions Vol1 Biology examination. This question covers Cellular respiration, Enzyme activity, Mitochondrial function .

Waec Model Questions Vol1 2020 Biology Essay / Theory
Topics: Cellular respiration Enzyme activity Mitochondrial function
Question 4 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • BIOLOGY • essay

In a controlled laboratory experiment, the effect of temperature on the rate of respiration in germinating beans was investigated. The beans were placed in sealed respirometers and the volume of carbon dioxide (CO₂) produced in 10 minutes was recorded at three different temperatures: - 20 °C → 12 mL CO₂ - 30 °C → 18 mL CO₂ - 40 °C → 15 mL CO₂ Answer the following:

Question Parts

( a )
Calculate the rate of CO₂ production (in mL min⁻¹) at each temperature and state the temperature at which the respiration rate is highest.
( b )
Explain the observed trend in respiration rate with increasing temperature, citing the role of enzymes.
( c )
Answer the following: (i) Outline the main stages of aerobic respiration in plant cells. (ii) State the net number of ATP molecules produced from one molecule of glucose during aerobic respiration.
( ) Outline the main stages of aerobic respiration in plant cells.
( ) State the net number of ATP molecules produced from one molecule of glucose during aerobic respiration.

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About This Question

This is Waec Model Questions Vol1 2020 Biology Question 4. It is one of the essay questions from the 2020 Waec Model Questions Vol1 Biology examination.

The question covers Cellular respiration, Enzyme activity, Mitochondrial function .

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