Question

amoeba sisters video recap: \photosynthesis and cellular respiration\
note: this recap compares two amoeba sisters videos: photosynthesis and cellular respiration.

1. in photosynthesis, what are the two major reactions that take place?
2. where do each of these reactions take place?
3. in aerobic cellular respiration, what three major steps are involved?
4. where do each of these three major steps take place (for eukaryotes)?

formula illustrations
for the following formulas, (1) determine whether the formula is photosynthesis or cellular respiration, (2) circle the products, and (3) creatively illustrate each reactant or product in the box underneath.

1. formula is for: 6co₂ + 6h₂o $xrightarrow{light}$ c₆h₁₂o₆ + 6o₂

carbon dioxide water oxygen

1. formula is for: c₆h₁₂o₆ + 6o₂→ 6co₂ + 6h₂o + atp energ

Explanation:

1. In photosynthesis, the two major reactions are the light - dependent reactions and the light - independent reactions (Calvin cycle). The light - dependent reactions occur in the thylakoid membranes of chloroplasts and convert light energy into chemical energy (ATP and NADPH). The light - independent reactions occur in the stroma of chloroplasts and use the ATP and NADPH to fix carbon dioxide into glucose.
2. As mentioned above, light - dependent reactions are in thylakoid membranes and light - independent reactions are in the stroma of chloroplasts.
3. The three major steps in aerobic cellular respiration are glycolysis, the Krebs cycle (citric acid cycle), and the electron transport chain. Glycolysis breaks down glucose into pyruvate. The Krebs cycle further breaks down pyruvate and generates electron carriers. The electron transport chain uses these electron carriers to produce a large amount of ATP.
4. For eukaryotes, glycolysis occurs in the cytoplasm. The Krebs cycle occurs in the mitochondrial matrix. The electron transport chain occurs in the inner mitochondrial membrane.
5. The formula $6CO_2 + 6H_2O\xrightarrow{Light}C_6H_{12}O_6 + 6O_2$ is for photosynthesis. The products are $C_6H_{12}O_6$ (glucose) and $6O_2$ (oxygen).
6. The formula $C_6H_{12}O_6+6O_2

ightarrow6CO_2 + 6H_2O+ATP$ is for cellular respiration. The products are $6CO_2$ (carbon dioxide), $6H_2O$ (water), and ATP (energy).

Answer:

1. Light - dependent reactions, light - independent reactions
2. Thylakoid membranes, stroma of chloroplasts
3. Glycolysis, Krebs cycle, electron transport chain
4. Cytoplasm, mitochondrial matrix, inner mitochondrial membrane
5. Photosynthesis; Products: $C_6H_{12}O_6$, $6O_2$
6. Cellular respiration; Products: $6CO_2$, $6H_2O$, ATP