Answer 1: By using the energy of sunlight , plants can convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis. As photosynthesis requires sunlight, this process only happens during the day. ... Oxygen is required to do this.
How would you show that light is necessary for oxygen production?
When placed in direct sunlight the leaves released tiny bubbles of gas . ... To show that it is the light energy and not the heat of sunlight which is necessary he repeated the experiment with leaves placed near a fire. He established that the production of oxygen was a universal process for which plants need light.
Is oxygen produced in the dark?
The electrons obtained serve NADPH and ATP generation for carbon dioxide fixation; oxygen is a mere by-product of this metabolism . ... De novo oxygen production can be driven by either light or chemical energy. The second, “dark” way takes advantage of oxidants with a more positive redox potential than the O 2 /H 2 O couple.
Is oxygen released in the absence of light?
At night, or in the absence of light, photosynthesis in plants stops, and respiration is the dominant process. ... This can also be described as the light intensity at which the rate of oxygen production is exactly balanced by the rate of oxygen consumption.
Does light influence o2 production?
Oxygen production increased as the light intensity increased due the greater availability of light energy for photosynthesis.
Does increasing light intensity always have the same effect on oxygen production?
Overall, we observed an increasing rate of oxygen production with increasing light intensity. ... Increasing light causes an increase in the photosynthetic rate most likely due to light's stimulatory effect on Photosystem II of C. reinhardtii.
How does the carbon dioxide level affect oxygen production?
A pure carbon dioxide environment makes the Elodea produce more oxygen than Elodea grown in a normal atmosphere environment. All materials a plant needs to undergo photosynthesis and produce oxygen are carbon dioxide, sunlight, and water.
What kind of bacteria produces oxygen?
The answer is tiny organisms known as cyanobacteria, or blue-green algae . These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen.
How is oxygen generated?
The most common commercial method for producing oxygen is the separation of air using either a cryogenic distillation process or a vacuum swing adsorption process. ... Oxygen can also be produced as the result of a chemical reaction in which oxygen is freed from a chemical compound and becomes a gas.
How do bacteria obtain oxygen?
Continuous supplies of oxygen are available only to bacteria that come into contact with air , as occurs when bacteria are able to float on a surface that exposes them to air or when the medium in which the bacteria live is stirred vigorously.
What is the test for oxygen?
Pulse oximetry measures how much oxygen the haemoglobin in your blood is carrying. This is called the oxygen saturation and is a percentage (scored out of 100). It's a simple, painless test which uses a sensor placed on your fingertip or earlobe.
Do plants take in oxygen?
Most folks have learned that plants take up carbon dioxide from the air (to be used in photosynthesis) and produce oxygen (as a by-product of that process), but less well known is that plants also need oxygen . ... So plants need to breathe — to exchange these gases between the outside and the inside of the organism.
What are the end products of light reaction?
- Hint: The process of using the energy in sunlight to make food (glucose) is known as photosynthesis. ...
- Complete answer: ...
- Therefore, the end products are ATP and NADPH.
- Note: The ATP and NADPH from the light-dependent reactions are used to make sugars in the Calvin cycle.
Which light produces the healthiest plant?
Blue light has the best absorption by the plant due to the green pigment every plant has, also known as chlorophyll. This chlorophyll absorbs the blue light and transfers it into energy through photosynthesis making the plant grow faster because it's able to get more nutrients.
Why does oxygen production stop without light?
Answer 2: Plants break down sugar to energy using the same processes that we do. Oxygen is needed to break the sugar into carbon dioxide, releasing energy the plants can use to stay alive. ... Since there's no sunlight at night, this gives the plants a way to stay alive, even when there's no light.
What is the rate of oxygen production when there is no carbon dioxide available?
1. What is the rate of oxygen production when there is no carbon dioxide available? (1 mark) Answer: 0.0ml/hr 2 .
