Photosynthesis-Provider Of Food For All Solutions for Class 10 Biology ICSE Board (Concise - Selina Publishers)
FAQs on Photosynthesis-Provider Of Food For All Solutions for ICSE Board Class 10 Biology
1. What are the things needed to carry out photosynthesis?
Photosynthesis is basically conversion of solar energy to chemical energy. Plants usually need four ingredients to perform photosynthesis. They are
Water which they draw from beneath the soil with the help of roots
Sunlight is the only energy needed to perform the mechanism
Carbon Dioxide from the atmosphere is absorbed from the atmosphere by the leaves
Chlorophyll is an important pigment present in plants to perform photosynthesis.
Hence the chemical equation for photosynthesis can be written as:
6CO2+ 6H2O→C6H12O6 + 6O2
2. What is the importance of photosynthesis according to Photosynthesis-Provider Of Food For All Solutions for ICSE Board Class 10 Biology?
Photosynthesis is important for the survival of the whole living world. It removes the carbon dioxide accumulated in the atmosphere for making food for the plant and gives oxygen as the byproduct of the mechanism. Thus the whole atmosphere gets purified and refreshed with the supply of oxygen and the removal of carbon dioxide giving us pure air to breathe. Photosynthesis is also important for food. It is the mechanism by which a plant produces its food and survives so that we get food from plants as well in the form of its fruit, leaves, stem, buds, root,s and even flowers and that is why the mechanism is also referred to as a producer of food.
3. What are the types of Photosynthesis mentioned in Photosynthesis-Provider Of Food For All Solutions for ICSE Board Class 10 Biology?
Photosynthesis is the mechanism by which plants convert solar energy to chemical energy for themselves to survive. The product of photosynthesis i.e glucose is the food on which they survive. There are mainly two types of photosynthesis. Oxygenic and anoxygenic photosynthesis. The former is the common one seen in plants and algae while the latter one is seen in certain types of bacteria. The name suggests that the latter does not produce oxygen as a byproduct and hence is not important for living bodies.
4. What are the stages of photosynthesis?
Photosynthesis has two steps. They are light-dependent reactions and light-independent reactions. The light-dependent reactions take part within the chloroplast thylakoids where the pigment chlorophyll is present. This stage is initiated by the light energy from the sun. Once the light-dependent reaction completes the light-independent reaction also referred to as the Calvin cycle starts within the chloroplast stroma. This step is also referred to as the carbon fixation step since in this step the products of light-dependent step i.e. ATP and NADPH start a chemical process where carbon from carbon dioxide is used to ultimately produce a variety of sugars and energy molecules for the plant. Photosynthesis is thus a well-synchronized two-step process.
5. What are the common misconceptions related to photosynthesis?
It is often believed that photosynthesis and respiration are just opposite to each other and they are just the reversal of each other. However, this is not true. Each proceeds with a completely different set of steps. They differ only in the sense of the reactants and products they release and absorb. While the former uses carbon dioxide in one step and finally releases oxygen as a byproduct the latter converts the oxygen they breathe to carbon dioxide. However, they follow completely different mechanisms from each other where none of the steps are related to each other.
