Which of the following equation most adequately sums up the photosynthetic reaction?
Correct answer: D. 6CO2 + 12H2O + Light → C6H12O6 + 6O2 + 6H2O
- A. CO2 + H2O + Light → CH2O + O2
- B. C6H12O6 + 6H2O → 6CO2 + 6H2O
- C. 6CO2 + 6H2O → C6H12O6 + 6O2
- D. 6CO2 + 12H2O + Light → C6H12O6 + 6O2 + 6H2O
Explanation
Option D is correct because it describes the complete photosynthetic process where carbon dioxide (6CO2) and water (12H2O), in the presence of light energy, are converted into glucose (C6H12O6) and oxygen (6O2). This equation accurately balances the water molecules, with 12 being consumed and 6 being produced. Option A oversimplifies the reaction by not representing the full glucose molecule. Option B incorrectly describes cellular respiration, a process opposite to photosynthesis. Option C omits the essential role of light energy and does not account for the correct water balance.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
Practise Bioenergetics
1,378 free Bioenergetics MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Bioenergetics questions
Which substance enters and leaves a mitochondrion during aerobic respiration?
The first stable product of the Calvin cycle is
A process of CO₂ fixation in photosynthesis by which the first product is the four-carbon oxaloacetate molecule is called:
If a photosynthesizing plant releases oxygen containing more than the normal amount of 18O, it is concluded that the plant has been supplied with:
Where do the energy capturing reactions of photosynthesis occur?
The final acceptor of electrons during the non-cyclic electron pathway is: