During photosynthesis, glucose is produced from converted sunlight energy by plants. In general, the more light, the faster the rate of photosynthesis. However, research many years ago demonstrated that increased light intensity only increased the rate of photosynthesis up to a certain point. Therefore, the relationship of photosynthesis and cellular respiration is nonlinear (Biggs, Edison, Eastin, Brown, Maranville, & Clegg, 1971). When we put more heat the more molecules get active and produce oxygen (bubbles) to let the plant grow.
This causes the excitation of two electrons, and they move to a higher energy level. These high-energy electrons move along electron transport chains in a series of redox reactions, releasing energy which activates the enzyme ATPase required in the production of ATP. Reduced NADP (NADPH) is also formed during the light-dependent reaction. The products ATP and reduced NADP from the light-dependent reaction are then used in the light-independent stage of photosynthesis (aka the Calvin cycle). Both ATP and NADPH are responsible for the reduction of glycerate-3-phosphate into triose phosphate, which is converted into many useful organic compounds like carbohydrates, mainly glucose.
Any increase in the rate of reaction will cause an increase in the pressure of the oxygen. The first line of the graph (top) represents the normal rate of the reaction in a water solution of hydrogen peroxide and catalase. The second line represents the rate of reaction when acid is added to the solution and the third line represents the rate of reaction when a base is added to the solution. 1. What variable is plotted on the x-axis?
It increases as the Earth’s atmosphere warms which makes it the most feedback mechanisms to the green house effect. Carbon Dioxide is released through natural activities like volcano eruptions and human activities like deforestation and burning of fossil fuels. We have seen that humans have increased their atmospheric CO2 concentration by a third since the Industrial Revolution. Methane is a hydrocarbon gas, which is produced through natural sources and human activities such as decomposition of wastes in landfills and rice cultivation. Methane is a more active green house gas than CO2 but is less abundant in the atmosphere.
These industrial activities have raised atmospheric gases such as carbon dioxide which contribute to greenhouse gases. The extra amount of these gases mean there is a thicker layer, meaning the gases absorb outgoing long-wave radiation which traps in too much heat. Increasing amounts of CO₂, methane, nitrous oxide, water vapour and ozone all contribute to this. The main cause in this rise is the burning of fossil fuels such as coal, oil, natural gas and petrol. Since the industrial revolution the levels of atmospheric CO₂ have increased from 280 parts per million to 380ppm for the past 10,000.
Plant Pigments Depending on Photosynthesis. Is the rate of photosynthesis faster when there are extreme light and temperatures present? Paper chromatography is a technique used for separating and identifying pigments. The solvent DPIP, (2, 6-dichlorophenol-indophenol), which is often used to substitute for NADPH, moves up the paper by capillary action. As the solvent moves up the paper, it carries along any substances dissolved in it, which are the pigments.
Scientific paper Introduction: (Total: 10 pts) 1. Transpiration is critical for plant physiology. In your own words, what is transpiration, and why is this important in plants? (2 pts) Transpiration is the process of liquid transforming into the gas phase of water when the stomata open. It is very important for plants; it allows plants to pull up water from the roots to support photosynthesis.
Examining Photosynthesis Research Question: How does the amount of light affect the rate of photosynthesis? Hypothesis: The higher amount of light will create a faster rate of photosynthesis. This is because photosynthesis is run by sunlight. Variables: Independent Variable: The independent variable in this experiment is amount of light. Dependent Variable: The dependent variable in this experiment is the rate of photosynthesis.
- In mammals, most carbon dioxide is transported dissolved in blood plasma as hydrogen carbonate ions. - The presence of carbon dioxide has an effect on how saturated haemoglobin is with oxygen (curve shifts to the right – Bohr shift). Effect of increased carbon dioxide concentration on organisms: - Increased carbon dioxide concentration leads to an increased heart rate
The chloroplasts are protected and contained by a membrane, but they are close to the surface of the cell to catch the maximum amount of light. Their broad length also allows larger wavelengths of light to be absorbed. The energy absorbed is transferred to electrons and excites them to a higher energy level. This leads to the photolysis of water which results in the formation of hydrogen ions, electrons and oxygen gas. The electrons formed during photolysis then replace those excited by the light.