Question

chloroplasts are organelles found in plant cells that are essential for photosynthesis. which specific structure within the chloroplast directly captures light energy?
thylakoid membranes
stroma
mitochondrial matrix
cell wall
which of the following correctly identifies the reactants of the photosynthesis reaction?
glucose and oxygen
water and oxygen
carbon dioxide and glucose
water and carbon dioxide

Explanation:

1. Thylakoid membranes in chloroplasts contain chlorophyll and other pigments that directly capture light - energy for the light - dependent reactions of photosynthesis. The stroma is the fluid part of the chloroplast where the Calvin cycle (light - independent reactions) occurs. The mitochondrial matrix is part of mitochondria, not chloroplasts, and is involved in cellular respiration. The cell wall provides structural support to plant cells and is not involved in light - energy capture.
2. The photosynthesis reaction is \(6CO_2 + 6H_2O

ightarrow C_6H_{12}O_6+6O_2\). Carbon dioxide (\(CO_2\)) and water (\(H_2O\)) are the reactants, while glucose (\(C_6H_{12}O_6\)) and oxygen (\(O_2\)) are the products.

Answer:

1. A. Thylakoid membranes
2. D. Water and carbon dioxide