What is photosynthesis Igcse biology?

Photosynthesis can be defined as the process by which plants manufacture carbohydrates from raw materials using energy from light. Plants are. Autotrophs – they can make complex molecules (glucose) from simple molecules (carbon dioxide and water)

What happens during photosynthesis GCSE biology?

Photosynthesis is the chemical change which happens in the leaves of green plants. It is the first step towards making food. During this reaction, carbon dioxide and water are converted into glucose and oxygen. The reaction requires energy in the form of sunlight, and chlorophyll must also be present.

What is photosynthesis GCSE BBC Bitesize?

Photosynthesis is a process that occurs in the leaves of a plant and needs both chlorophyll and light energy. During photosynthesis, the chlorophyll in leaves help convert carbon dioxide and water into the products oxygen and glucose. The product glucose acts as a vital source of food for the plant.

Why is light needed for photosynthesis GCSE?

Photosynthesis requires energy in the form of light to drive the chemical reaction. Photosynthesis is an endothermic reaction. The light energy required is absorbed by a green pigment called chlorophyll in the leaves.

What are the two stages of photosynthesis GCSE?

Photosynthesis involves several different chemical reactions, but these can be summarised in two main stages. In the first reaction, energy is used to split water molecules into hydrogen and oxygen. The hydrogen is needed for the second stage of reactions and the oxygen is released by the plant as a waste product.

How does photosynthesis work BBC Bitesize?

What are the 3 things plants need for photosynthesis?

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

How photosynthesis works step by step?

During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.

Why is the leaf placed in sunlight for 5 hours?

The leaf is placed in sunlight for at least 5 hours to show that sunlight is essential for photosynthesis. About photosynthesis: Photosynthesis is the process of preparing food by the plants. They use sunlight and water to produce starch for their growth.

What 3 things are taken in by a plant during photosynthesis?

What are the 6 steps of photosynthesis?

Terms in this set (7)

  • Step 1-Light Dependent. CO2 and H2O enter the leaf.
  • Step 2- Light Dependent. Light hits the pigment in the membrane of a thylakoid, splitting the H2O into O2.
  • Step 3- Light Dependent. The electrons move down to enzymes.
  • Step 4-Light Dependent.
  • Step 5-Light independent.
  • Step 6-Light independent.
  • calvin cycle.

What part of the leaf turns into blue black color?

After a few minutes, the parts of the leaf that contain starch turn the iodine from brown to blue/black. Variegated leaves have green parts (where the cells contain chlorophyll) and white parts (where there is no chlorophyll).

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