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Photosynthesis

This category is for questions about the chemical process in which autotrophic organisms use sunlight, carbon dioxide and water to make glucose, water and oxygen. This process is vital to life and is of great importance in biology.

6,415 Questions

Where is Calvin cycle occurring?

The Calvin cycle occurs in the stroma of the chloroplasts in plant cells. It is the second stage of photosynthesis, where carbon dioxide is converted into sugars using ATP and NADPH produced during the light-dependent reactions.

How does photosynthesis take place in winter?

Photosynthesis occurs within an ideal band of temperature. As the temperature changes in either direction from the center of the band, the photosynthesis rate decreases.

What is energy transformation occur in a photosynthesis?

I'm no expert but thinking back to my high school science courses I believe that light is changed to oyxgen during the photosynthesis process in plants.

What happens in plant cells during photosynthesis?

In the thylakoid of the chloroplast inside a plant, the organelle called Photosystem II is excited by light through the leaves of the plant. When this happens it breaks up H20, (water from the roots), into H2 and 02. (Oxygen cannot exist as one single molecule stably, therefore it bonds with other oxygen molecules forming 02 rather than the one oxygen molecule bonded with the two hydrogen in H20.) The oxygen goes through the stroma of the leaves, this is called transpiration. The hydrogen goes down through another organelle called ATP synthase where it is transformed into ADP and then combined with another phosphate group to become ATP. During the time that Photosystem II breaks up H20, it also sends electrons down the electron chain to Photosystem I where the electrons then convert NaDP+ into NaDPH. These two products are then sent to the Calvin Cycle. In the Calvin Cycle, ATP and NaDPH are turned into glucose by two turns of the cycle.

What statement is correct about photosynthesis and cellular respiration?

The chemical equations for the processes are opposites of each other. The chemical equation for photosynthesis is: solar energy + 6CO2 + 6H2O ---> C6H12O6 + 6O2

The chemical equation for cellular respiration is: C6H12O6 + 6O2 ---> 6CO2 + 6H2O + energy. The ONLY difference is that photosynthesis uses sunlight while cellular respiration produces energy in the form of ATP. :)

How can photosynthesis and respiration be summarized into equations?

Notice that the equation for cellular respiration is the direct opposite of photosynthesis: Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O. Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O.

Why is oxygen so important in cellular respiration?

Oxygen is essential in cellular respiration because it serves as the final electron acceptor in the electron transport chain, allowing for the production of the majority of ATP in aerobic respiration. Without oxygen, the electron transport chain cannot function, resulting in a significant decrease in ATP production and ultimately leading to cell death.

Where does the light dependent phase of photosynthesis occure?

The 'light phase' or 'absorption phase' is always happening when the sun is shining on a plant. The cell walls of leaves automatically are open to sunlight, usually at all times.

Small changes may occur when it rains, or snows, or otherwise precipitates.

How do stems contribute to photosynthesis?

The role of the plants stem during photosynthesis is to bring the plant the needed water needed for photosynthesis. The water has a chemical reaction with the carbon dioxide and produces glucose and oxygen.

What is the process of capture energy from sunlight?

Photosynthesis is the process used by plants to capture the energy that comes to us from the sun that is then held in starch or sugars.

How is energy transferred between photosynthesis and cellular respiration?

Photosynthesis:

Water + Carbon dioxide => light energy => Oxygen + Glucose

6H2O + 6CO2 + light -> 6O2 + C6H12O6

Respiration:

Oxygen + Glucose -> water + carbon dioxide + energy

6O2 + C6H12O6 -> 6H2O + 6CO2 + energy

What provides energy by plants during photosynthesis?

Plants do not take in energy. Plants take in carbon dioxide and sunlight. They then convert this into glucose for energy during the photosynthesis process.

What is the role of the cytochrome complex in photosynthesis?

Cytochrome BF is a complex that is involved in the electron and H+ transportation in chloroplast. During the light dependent reaction in the chloroplast, cytochrome BF uses high energy electrons from the PSi PSii proteins to transport H+ across the Thylakoid membrane to be used later to synthesize ATP.

Cytochrome BF is homologous to Cytochrome BC in Mitochondria, which is used in the electron transport chain in cell respiration.

Can photosynthesis happen during nighttime?

yes,there are two reactions the light dependent and the light independent.

pen the light independent is the reaction where the photosynthesis happen nighttime.

Why producers carry out photosynthesis?

To create energy

They obtain both carbon and energy from photosynthesis. They store them in glucose molecules

The raw materials for respiration are the opposite of the end products for photosynthesis?

I think Raw Materials are what goes into it. Products is what comes out/ what is produced.

What does a plant produce during photosynthesis?

Plants first make two special compounds called ATP and NADPH, and only after a subsequent series of steps, do hydrogen (H) atoms from NADPH are combined with carbon dioxide (CO2)from the air to produce glucose (C6H12O6)

What are the two stages in photosynthesis?

Photosynthesis is performed in two stages:

Light reactions (or light-dependent reactions): Energy from sunlight is required.

Dark reactions (or light-independent reactions): No sunlight is required. However, energy formed by the light-dependent reactions is needed.

What is the relationship between stomata and photosynthesis?

stomate are opening on the underside of a leaf. They are controlled by guard cells. When guard cells are turgid they stomate open and transpiration occurs when they are flaccid they close to retain water and prevent loss of water by transpiration