Photo AI
A student investigated the effect of temperature and oxygen on the production of lactic acid by cultured human skin cells - VCE - SSCE Biology - Question 18 - 2022 - Paper 1
Question 18
A student investigated the effect of temperature and oxygen on the production of lactic acid by cultured human skin cells. At the start of this experiment, each test... show full transcript
Worked Solution & Example Answer:A student investigated the effect of temperature and oxygen on the production of lactic acid by cultured human skin cells - VCE - SSCE Biology - Question 18 - 2022 - Paper 1
Step 1
Which test tube would be expected to contain the highest concentration of lactic acid?
Answer
Lactic acid fermentation typically occurs under anaerobic conditions, and higher temperatures can promote this process. In the experiment, test tube 3 has a temperature of 37°C and an oxygen content of 5%, which is conducive for lactic acid production since the cells are in low oxygen (anaerobic) conditions, leading to higher lactic acid accumulation. Therefore, the answer is Test tube 3.