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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

1 answer

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.