What are the steps involved in light reaction?
What are the steps involved in light reaction?
The photochemical phase of photosynthesis is also known as the light reaction. It is responsible for the formation of high-energy chemical intermediates, ATP and NADPH, and it includes light absorption, water splitting and release of oxygen. It takes place in the granal thylakoids of chloroplasts.
What is the first step of photosynthesis called?
Light Reactions
What happens in the first step of photosynthesis?
During the first stage of photosynthesis, called the light-dependent reaction, sunlight excites the electrons in the chlorophyll pigment. The organism uses this energy to create the energy carrier molecules ATP and NADPH, which are crucial for carbon fixing during the second stage.
What are the three main components in the process of photosynthesis?
In photosynthesis, chlorophyll, water, and carbon dioxide are reactants. GA3P and oxygen are products.
What is the basic formula of photosynthesis?
The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
What are the factors that affect photosynthesis?
The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.
What are three environmental factors that affect photosynthesis?
Three factors can limit the rate of photosynthesis: light intensity, carbon dioxide concentration and temperature.
- Light intensity. Without enough light, a plant cannot photosynthesise very quickly – even if there is plenty of water and carbon dioxide.
- Carbon dioxide concentration.
- Temperature.
What are five factors that affect the rate of photosynthesis?
Several factors can affect the rate of photosynthesis:
- light intensity.
- carbon dioxide concentration.
- temperature.
Which factor indirectly affects the process of photosynthesis?
Water indirectly affects the process of photosynthesis by causing water stress due to its unavailability. It causes closing of stomata which further results in CO2 unavailability and hence affecting photosynthesis.
Which of the following factor is not affected the process of photosynthesis?
Question For You (b) The number of stomata. Photosynthesis is affected by light, temperature, water, and CO2. Stomata affect the process of transpiration and do not affect photosynthesis.
Why is light a limiting factor in photosynthesis?
At lower light intensities, light is the limiting factor because an increase in light causes an increase in photosynthesis. An increased level of carbon dioxide leads to a higher rate of photosynthesis when compared to the lower carbon dioxide level.
Are limiting factors?
A limiting factor is anything that constrains a population’s size and slows or stops it from growing. Some examples of limiting factors are biotic, like food, mates, and competition with other organisms for resources. Limiting factors are usually expressed as a lack of a particular resource. …
How light intensity affects the rate of photosynthesis experiment?
More oxygen bubbles are produced when the light is closer to the beaker. So a greater light intensity gives a greater rate of photosynthesis.
What factors affect light intensity?
Factors affecting photosynthesis – light intensity
- the rate of oxygen production (number of bubbles or volume of oxygen gas given off in a set time)
- the rate of carbon dioxide uptake.
- the rate of glucose production.