Question

Question 1 The table shows the direction and function of substances in a chemical reaction that takes place in the chloroplasts of plant cells. The table is missing information at , X, and What is substance W? Substance Carbon dioxide Direction In the Reaction ( In or Out) In Oxygen W Out Sugar molecules X Water Function In the Reaction Used to make other substances containing carbon a product of the chemical reaction Provides the main energy source for the reaction Y Splits and is used to provide oxygen and hydrogen atoms for the reaction a starch b sunlight 0000 minerals d methane

Answer 1

In the context of the chemical reactions that occur in the chloroplasts of plant cells, specifically during photosynthesis, we can fill in the missing information for substances W and X in your table.

1. **Substance W**: This refers to "sugar molecules". In photosynthesis, plants convert carbon dioxide and water into glucose (a type of sugar) using sunlight as energy. Therefore, substance W is **glucose**.

2. **Substance X**: This is associated with the "function" being a product of the chemical reaction, which includes glucose. In this case, the typical byproducts of photosynthesis are glucose and oxygen. Given the context, substance X can be identified as **oxygen**.

3. **Substance Y**: Referring to "water," which is split during photosynthesis to provide oxygen and hydrogen atoms.

To summarize:
- **Substance W**: Glucose
- **Substance X**: Oxygen
- **Substance Y**: Water

Among the choices provided, **glucose (which is not provided in W’s choices)** is most likely what you want. However, if looking at the potential options provided (a. starch, b. sunlight, c. minerals, d. methane), we can interpret '**starch**' as a correct response assuming it refers to a storage form of glucose which is produced indirectly through glucose during and after the process of photosynthesis.

So, **Substance W = glucose (or starch)** if that option is preferable, but no **glucose** is listed in the choices provided.