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 a title and information at W, X, and Y.
Title:____________________
Substance Direction In the Reaction
(In or Out) Function In the Reaction
Carbon dioxide In Used to make other substances containing carbon
Oxygen Out Is a product of the chemical reaction
W In Provides the main energy source for the reaction
Sugar molecules X Y
Water In Splits and is used to provide oxygen and hydrogen atoms for the reaction
What is the direction, X, and function, Y, for the sugar molecules?
A.
Direction X is out; function Y is to provide chemical energy for the plant cell.
B.
Direction X is in; function Y is to provide heat energy for the plant cell.
C.
Direction X is out; function Y is to form more chlorophyll for the plant cell.
D.
Direction X is in; function Y is to form large sugar molecules for the plant cell.
The direction, X, for the sugar molecules is in and the function, Y, is to form large sugar molecules for the plant cell. Therefore, the correct answer is D.
The correct answer is D.
Direction X for sugar molecules is in, and their function Y is to form large sugar molecules for the plant cell.
To determine the direction and function of sugar molecules in the given chemical reaction, we look at the information already provided in the table.
According to the table, the direction for sugar molecules is not explicitly mentioned. However, we can deduce it based on the given information. It says that carbon dioxide is taken in and used to make other substances containing carbon, while oxygen is produced and goes out as a product of the reaction.
Since sugar molecules contain carbon, it can be inferred that they are also formed or synthesized during the reaction. Therefore, the direction X for sugar molecules should be "in" because they are produced as a result of the reaction.
Now, let's determine the function Y for sugar molecules. The table mentions that water is split and used to provide oxygen and hydrogen atoms for the reaction. This tells us that water is involved in the synthesis of other substances, such as sugar molecules.
Hence, the function Y for sugar molecules is to form large sugar molecules for the plant cell.
Therefore, the correct answer is D. Direction X is in; function Y is to form large sugar molecules for the plant cell.