Table of Contents
- 1 How does high oxygen concentration limit photosynthesis?
- 2 What is the dependent variable in the oxygen production experiment?
- 3 How does a change in oxygen relate to photosynthesis?
- 4 Which of these was a dependent variable in your fermentation experiment?
- 5 How do you test photosynthesis experiment?
- 6 How do you test for chlorophyll in plants?
How does high oxygen concentration limit photosynthesis?
Oxygen inhibits the photosynthesis of C3 plants at atmospheric CO2 concentration (Varburg effect). The main cause of this phenomenon is the competitive inhibition of RuBP carboxylation and stimulation of RuBP oxygenation, the latter resulting in formation of glycolate and photorespiratory CO2.
What is the dependent variable in the oxygen production experiment?
The dependent variable was the displacement of the water edge. The control for this investigation was the height of the Elodea plant, which was four centimeters for each test tube, and the distance between the light source and the test tubes.
How can plants be tested for photosynthesis?
You need to:
- heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions)
- heat it in boiling ethanol for a few minutes (this removes most of its colour)
- wash with water and spread onto a white tile.
- add iodine solution from a dropping pipette.
How is oxygen measured in photosynthesis?
Oxygen can be measured by counting bubbles evolved from pondweed, or by using the Audus apparatus to measure the amount of gas evolved over a period of time.
How does a change in oxygen relate to photosynthesis?
Photosynthesis makes the glucose that is used in cellular respiration to make ATP. While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. It is the released oxygen that is used by us and most other organisms for cellular respiration.
Which of these was a dependent variable in your fermentation experiment?
The dependent variable is the value that was measured or calculated during the experiment. In this case the dependent variable was either CO2 volume (ml) or the calculated respiration rate (ml CO2/min).
How do plants use co2 in photosynthesis?
Plants extract the carbon dioxide from the air and use it in photosynthesis process to feed themselves. The carbon dioxide enters the leaves of the plant through small pores called stomata. During this process, the plant combines carbon dioxide with water to allow the plant to extract what it needs for food.
How is co2 used in photosynthesis?
During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.
How do you test photosynthesis experiment?
Use a measuring spoon to scoop out 1/8 teaspoon of baking soda, and fill your measuring cup with 300 milliliters of water. Mix the baking soda into the water to create your bicarbonate solution. When the baking soda dissolves in the water, it releases carbon dioxide. This will be used by the spinach for photosynthesis.
How do you test for chlorophyll in plants?
heat a plant leaf in boiling water for 30 seconds (this kills the leaf, stopping any chemical reactions) add the leaf to boiling ethanol in a water bath for a few minutes (the boiling ethanol dissolves the chlorophyll and removes the green colour from the leaf – it turns white so it is easy to see the change in colour)