It is convenient to divide the photosynthetic process in plants into four stages, each occurring in a defined area of the chloroplast: (1) absorption of light , (2) electron transport leading to the reduction of NADP + to NADPH, (3) generation of ATP, and (4) conversion of CO 2 into carbohydrates (carbon fixation).
What are the 3 steps of photosynthesis?
The three events that occur during the process of photosynthesis are: (i) Absorption of light energy by chlorophyll. (ii) Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen . (iii) Reduction of carbon dioxide to carbohydrates.
What is photosynthesis explain step by step?
The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions) . Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.
What are the 10 steps of photosynthesis?
- Step One (Light Reaction) Three ingredients are needed: water, sunlight, and carbon dioxide. ...
- Step Two (Light Reaction) ...
- Step Three (Light Reaction) ...
- Step Four (Light Reaction) ...
- Step Five (Light Reaction) ...
- Step Six (Light Reaction) ...
- Step Seven (Light Reaction) ...
- Step Eight (Dark Reaction)
What are the steps of photosynthesis in order?
- 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 is the process of photosynthesis Class 7?
The process by which green plants make their own food (like glucose) from carbon dioxide and water by using sunlight energy (in the presence of chlorophyll) is called photosynthesis. ... The leaves of a plant can synthesise food because they contain a green pigment chlorophyll (which is necessary for making food).
What are the two main steps in photosynthesis?
There are two main stages of photosynthesis: the light-dependent reactions and the Calvin cycle .
What is the first step of photosynthesis called?
The first stage of photosynthesis is called the light reactions . During this stage, light is absorbed and transformed to chemical energy in the bonds of NADPH and ATP.
What is the first step in photosynthesis?
The first step of photosynthesis is the absorption of light energy and the loss of electrons from chlorophyll . Photosynthesis is a process by the plant to produce food by absorbing light of a certain wavelength and used to convert water and carbon dioxide and minerals into oxygen-rich and energy-rich organic compounds.
What happens in the first step of photosynthesis?
Photosynthesis occurs in two stages. In the first stage, light-dependent reactions or light reactions capture the energy of light and use it to make the energy-storage molecules ATP and NADPH . During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.
What is photosynthesis explain with diagram?
photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy . During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
What is the importance of photosynthesis Class 7?
Photosynthesis helps to maintain a balance between oxygen and carbon dioxide in the atmosphere as it absorbs carbon dioxide and release oxygen. Sunlight is necessary for photosynthesis. Thus sun is the ultimate source of energy for all living organism.
What is importance of photosynthesis?
– It fixes and balances the amount of carbon dioxide and oxygen in the atmosphere by plants exhaling oxygen and animals and humans exhaling carbon dioxide. – It helps in the synthesis of organic compounds from inorganic compounds. – It provides nutrition to the plants and thus helps in their growth and development.
Why is photosynthesis a 2 step process?
Photosynthesis represents the biological process by which plants convert light energy into sugar to fuel plant cells. Comprised of two stages, one stage converts the light energy into sugar , and then cellular respiration converts the sugar to Adenosine triphosphate, known as ATP, the fuel for all cellular life.
What is parasite in science class 7?
Parasites are organisms that depend upon another organism (host) for food and cause harmful effects or dieseases to the host . Examples: Cuscuta (Amarbel), mosquitoes and head lice. saprotrophs are orgnisms that obtain nutrition from dead and decaying organic matter. Examples: Fungi and some bacteria.
What are stomata Class 7?
Stomata are tiny pores or opening on the surface of a leaf . ... (i) Evaporation of water in plants in the form of vapour takes place through stomata during transpiration. (ii) Exchange of gases (oxygen and carbon dioxide) also takes place through stomata. Question7.
