Question

1. the light - dependent reactions take place in the ________ of the chloroplast:

• stroma.
• inner membrane.
• thylakoid membrane.
• outer membrane.

1. ______ are stacks of ______ in the chloroplast.

• grana, thylakoids.
• stroma, grana.
• thylakoids, grana.
• stroma, thylakoids.

1. which of the following takes place during the calvin cycle?

• water molecules are split.
• co2 is transformed into glucose.
• nadph and atp are built to store energy
• sunlight is absorbed by the plant

Explanation:

Question 6

Light - dependent reactions of photosynthesis occur in the thylakoid membrane of the chloroplast. The stroma is where light - independent (Calvin cycle) reactions occur. The inner and outer membranes of the chloroplast do not host the light - dependent reactions.

In a chloroplast, grana are stacks of thylakoids. Stroma is the fluid - filled space in the chloroplast, not a stack of something. Thylakoids are the individual membrane - bound structures that make up grana, not the other way around.

During the Calvin Cycle (light - independent reactions), carbon dioxide ($CO_2$) is fixed and transformed into glucose. Splitting of water molecules, building of NADPH and ATP, and absorption of sunlight all occur during the light - dependent reactions, not the Calvin Cycle.

Answer:

C. Thylakoid membrane.

Question 7