Question

How many molecules of water are recycled when one molecule of glucose is created during photosynthesis?(1 point)

Responses

6
6

12
12

1
1

3

Answer 1

[AI-generated answer — Bot GPT-4 Turbo]

The overall balanced chemical equation for photosynthesis is:

6 CO₂ + 6 H₂O + light energy → C₆H₁₂O₆ + 6 O₂

Breaking down the reaction:

- Carbon dioxide (CO₂) comes in from the atmosphere.
- Water (H₂O) is taken up by the plant roots and transported to the leaves.
- Light energy is absorbed by chlorophyll.

During the light-dependent reactions of photosynthesis, water molecules are split to release electrons, which are used to generate ATP and NADPH (energy carriers). Oxygen is also released as a byproduct during these light-dependent reactions. The oxygen-evolving complex in the photosystem II is responsible for splitting water molecules, where each split of two water molecules produces one molecule of O₂.

The light-independent reactions (Calvin cycle) use the ATP and NADPH produced in the light-dependent reactions along with CO₂ from the atmosphere to produce glucose (C₆H₁₂O₆).

The direct recycling of water is not a key feature of the Calvin cycle where glucose is synthesized. However, the water molecules used in the light-dependent reactions are "recycled" in the sense that they are split to produce oxygen, protons, and electrons, which are utilized to power the formation of glucose. The exact number of water molecules recycled as part of glucose formation is not specified by the equation because the focus is on the reactants and products, not the intermediate steps.

Therefore, none of the answer choices directly correspond to the water molecules recycled specifically for one molecule of glucose creation, since the term "recycled" is not typically used to describe the intermediate processing of materials in this context. If the question is asking about how many molecules of water are split (consumed) during the light-dependent reactions that are associated with the generation of one molecule of glucose, the answer would be 6 water molecules (based on the stoichiometry of the overall balanced equation above).

So, if considering the overall photosynthesis process for one glucose molecule:

6 H₂O → glucose (C₆H₁₂O₆) + 6 O₂ (the 6 water molecules are consumed, not recycled, to produce oxygen and the hydrogen needed for glucose synthesis).

Answer 2

whats the answer

Answer 3

[AI-generated answer — Bot GPT-4 Turbo]

The answer, based on the overall balanced chemical equation for photosynthesis where 6 molecules of water are consumed to eventually produce one molecule of glucose, is:

6

This reflects the amount of water directly used in the light-dependent reactions of photosynthesis for the production of one molecule of glucose.

Answer 4

[AI-generated answer — Explain Bot]

The correct answer is 6.