Photosynthesis is a process that occurs in plants, algae, and some bacteria, in which energy from sunlight is used to convert carbon dioxide and water into glucose (a sugar) and oxygen. This process is critical for the survival of plants, as it allows them to produce the energy they need to grow and thrive. It is also important for the overall health of the planet, as it helps to remove carbon dioxide from the atmosphere and produce oxygen, which is essential for animal life.
One practical application of photosynthesis is in the field of agriculture. Farmers rely on photosynthesis to produce crops, which are the primary source of food for humans and animals. Photosynthesis is also important for the production of biofuels, which are alternative sources of energy that are derived from plant materials.
Photosynthesis can also be studied in the laboratory setting, where scientists can manipulate various factors such as light intensity, temperature, and carbon dioxide levels to understand how they impact the process. This can help researchers develop ways to improve crop yields and increase the efficiency of biofuel production.
In addition to its practical applications, photosynthesis is also an important topic of study in the field of biology. It helps scientists understand the fundamental processes that sustain life on Earth and how different organisms interact with their environment.
Overall, photosynthesis is a vital process that plays a crucial role in many aspects of our lives. From producing the food we eat and the oxygen we breathe, to providing alternative sources of energy, it is an essential component of the natural world that we rely on every day.
❌ 6. Required Practical: Light Intensity And Rate Of Photosynthesis (B8) Flashcards by Jake Neighbour
How to investigate the rate of photosynthesis using redox indicators Generally, light intensity, carbon dioxide concentration, and temperature. Aim: Chlorophyll is a green coloured pigment that traps the sunlight to proceed with the synthesis of food by leaves by utilising carbon dioxide and water. Inference: Hence light is essential for photosynthesis, since without light no photolysis of water takes place and oxygen does not evolve. Experiment 11 To Show that Starch Synthesis In Etiolated Or Albino Leaves are Independent of Light Provided Sugars are Present : Experiment: Two comparable leaf samples are picked from etiolated rice or wheat seedlings grown in a dark room. A suitable starch-free leaf from a healthy; potted plant is introduced through the split cork in such a way that half of the leaf remains inside the bottle and the other half outside it. All connections are made air-tight with Vaseline. To prepare 6 5 pH buffer, 0.
Required practical activity
Pour about 5 ml of the suspension in two separate test tubes. Cut a piece of pondweed 8—10 cm long. On the other hand, the leaf, on which the vaseline was applied on the lower surface, shows negative test for starch, i. Count the bubbles coming out in each case for definite time intervals. Little evolution of bubbles takes place in the set-up maintained in low light intensity.
Activities and Experiments to Explore Photosynthesis in the Classroom
Experiment to demonstrate that carbon dioxide enters the leaf through the stomata: Requirements: A de-starched plant having stomata only on lower surface of leaves, vaseline, beaker, water, iodine, soft rag. In addition to it some portion of the leaf remains pressed in between the two halves of the cork. With the result there is no photosynthesis and starch formation in this portion of the leaf. Due to this light screen, some parts of the leaf are covered whereas other remaining parts are exposed to light. Rubisco: Ribulose bisphosphate carboxylase oxygenase, an enzyme which catalyses carboxylation i.
Top 11 Experiments on Photosynthesis in Plants
Now minute quantity of sodium or potassium hydrosulphite Na 2S 2O 4, 2H 2O or K 2S 2O 4, 2H 2O is very carefully added to the solution until the blue colour just disappears. The plants will release bubbles of oxygen — a product of photosynthesis — which can be counted. At the end of the experimental period the leaves from both the sets are tested for starch by iodine. Then you use the thermometer to measure the temperature of the water in the boiling tube. Material required: Green plant, iodine solution, dropper.
Rate of Photosynthesis: Required Practical
Now, again the plant is kept in the light and one of its leaves covered as in the figure. The photosynthesis required practical is a laboratory experiment that is typically carried out by students in order to fulfill the requirements for the course. The practical is divided into two parts; part 1 is the experiment with a few observational questions, part 2 is a formal assessment to be completed after the practical was completed. However, the following factors can limit the rate of photosynthesis when they are in short supply: Light As the intensity of light increases, so does the rate of light-dependent reactions of Therefore, increasing the intensity of light increases the overall rate of This is because more photons will fall on the leaf, therefore more electrons will be photoactivated activated to a higher energy level by light waves , allowing the water to be oxidised faster. If the plant is kept for a long time, viz. Observations and results: The dye is reduced only in one of the tube which is exposed to light; while in the other tube which is covered with a black paper the dye remains blue-coloured. The leaf is then washed with warm water so that it becomes soft.
