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Plants grown in light were supplied with water containing radioactive oxygen atoms - VCE - SSCE Biology - Question 10 - 2016 - Paper 1
Question 10
Plants grown in light were supplied with water containing radioactive oxygen atoms. After four hours, an analysis of the chemicals in and around the plants was under... show full transcript
Worked Solution & Example Answer:Plants grown in light were supplied with water containing radioactive oxygen atoms - VCE - SSCE Biology - Question 10 - 2016 - Paper 1
Step 1
Which one of the following would contain the radioactive oxygen atoms after four hours?
Answer
In order to determine which option contains the radioactive oxygen atoms after four hours, we must consider the process of photosynthesis. During photosynthesis, plants take in carbon dioxide (CO₂) and water (H₂O) to produce glucose (C₆H₁₂O₆) and oxygen gas (O₂).
Since the plants were supplied with water containing radioactive oxygen atoms, these radioactive atoms will be incorporated into the glucose and the oxygen gas produced. After four hours of photosynthesis, the radioactive oxygen atoms would be found in the oxygen gas as it is released as a byproduct. Thus, the correct answer is:
C. oxygen gas