Investigating Factors That Affect the Rate of Photosynthesis
INTRODUCTION
All green plants use raw materials from their surrounding atmosphere
to make their own food. They do this by a process called
Photosynthesis. Green plants contain many tiny structures called
Chloroplasts and these contain a chemical called Chlorophyll. This
chemical is a very important part of Photosynthesis, as this is where
the plant, to produce its own food, absorbs sunlight. Photosynthesis
mainly takes place in the Palisade Mesophyll cells, which are situated
near the top of the leaf. These cells contain lots of Chloroplasts,
which are closely packed together, so that they can trap the most
amount of sunlight possible.
Diagram To Show How Photosynthesis Takes Place In a Leaf
[IMAGE]
(This diagram is taken from 'Biology for you' by Gareth Williams)
The main purpose of Photosynthesis is for a plant to produce oxygen
and glucose so that the plant can grow. It does this by absorbing
light energy in chlorophyll and using this energy to change the two
main raw materials, (Carbon Dioxide, and Water) into glucose and
oxygen. The oxygen is the waste product from photosynthesis and
therefore goes into the atmosphere. The glucose goes onto to be stored
by the plant. The plant can not store the glucose, as it is, it has to
be turned into starch. The starch is then used as food and is stored
for when it is needed. Photosynthesis is a complex reaction and can be
summed up in an equation:
carbon dioxide + water light and chlorophyll glucose + oxygen
[IMAGE] 6 CO 6 H O C H O 6 O
FACTORS THAT EFFECT PHOTOSYNTHESIS Amandeep Virk
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* Light: This factor is just as important as the others are in
Photosynthesis, without it photosynthesis would simply not take place.
It has an effect on the rate of photosynthesis and depending on the
availability and source of light, it can make photosynthesis occur
either faster or slower. The amount of light can only increase to a
Our body obtains the energy by digesting the carbohydrates into glucose. Volumes of glucose are required by the body to create ATP. ATP is short for 'Adenosine Triphosphate ' and is an energy carrier. When we consume too many carbohydrates our body produces a lot of glucose and as a result blood glucose levels rise and sometimes they may rise over the normal range of blood glucose concentration. To bring it back within the healthy range, the homeostatic system of blood glucose regulation is used. The blood flows through the pancreas where the beta cells, receptors, detect the high blood glucose level. To counteract this stimuli beta cells alert the control centre, which are also the beta cells located in the islets of Langerhans in the pancreas. The secretion of insulin has to be done quickly but can only be carried out when insulin gene is switched on. Turning on the insulin gene switch can take 30 minutes to an hour therefore, the production of insulin by beta cells are done in advance and are packaged in vesicles right until blood glucose rises. Glucose comes into the beta cell to trigger the vesicle that contains the insulin to move towards the plasma membrane and fuse. This releases the insulin into the bloodstream where they are distributed throughout the body and only affect specific target cells. The receptor, a protein, on the target cell’s plasma membrane recognises and connects
This shows that there could be three variables in this experiment, carbon dioxide, water and light energy. So in our case the variable light energy (light intensity) will be used. The equation also shows that if there is more light energy then more glucose and oxygen will be produced.
Both starch and sucrose can be converted back into glucose and used in respiration. Photosynthesis happens in the mesophyll cell of leaves. There are two kinds of mesophyll cells - palisade mesophyll and spongy mesophyll. The mesophyll cells contain tiny bodies called chloroplasts which contain a green chemical called chlorophyll.
Experiment #1: The purpose of this experiment is to investigate the effects of baking soda and light intensity on the rate of photosynthesis of green spinach leave through the observation of floating disk.
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
An Analysis and Evaluation of Data from Photosynthesis Experiments Graph analysis This is my analysis for the investigation in to the affect of light intensity on the rate of photosynthesis to the Canadian pondweed, elodea. In the results the pattern is that when the light intensity is higher the readings are generally higher. On the graph the less the light intensity the lower the gradient of the curve. the equation for the photosynthesis process is; CO2 + 2H2O + Light Energy = =
product and glucose levels. Plants trap the energy in sunlight using chlorophyll, a light trapping pigment found in leaf plant cells. It then uses carbon dioxide which enters the plant through small holes found. on the underside of the leaf called stoma and water which enters the
In order for the body to maintain homeostatic levels of energy, blood glucose regulation is essential. Glucose is one of the body’s principal fuels. It is an energy-rich monosaccharide sugar that is broken down in our cells to produce adenosine triphosphate. In the small intestine, glucose is absorbed into the blood and travels to the liver via the hepatic portal vein. The hepatocytes absorb much of the glucose and convert it into glycogen, an insoluble polymer of glucose. Glycogen, which is stored in the liver and skeletal muscles, can easily be reconverted into glucose when blood-glucose levels fall. All of the body’s cells need to make energy but most can use other fuels such as lipids. Neurons; however, rely almost exclusively on glucose for their energy. This is why the maintenance of blood-glucose levels is essential for the proper functioning of the nervous system.
To make the test fair I will use the same amount of water and the leaf
To make sure that my test is fair I will make sure to keep all the
* Count the number of bubbles seen in 1 minute which is a way of
Photosynthesis is a process in plants that converts light energy into chemical energy, which is stored in bonds of sugar. The process occurs in the chloroplasts, using chlorophyll. Photosynthesis takes place in green leaves. Glucose is made from the raw materials, carbon dioxide, water, light energy and oxygen is given off as a waste product. In these light-dependent reactions, energy is used to split electrons from suitable substances such as water, producing oxygen. In plants, sugars are produced by a later sequence of light-independent reactions called th...
Photosynthesis is a process in which plants and other organisms convert the light energy from the sun or any other source into chemical energy that can be released to fuel an organism’s activities. During this reaction, carbon dioxide and water are converted into glucose and oxygen. This process takes place in leaf cells which contain chloroplasts and the reaction requires light energy from the sun, which is absorbed by a green substance called chlorophyll. The plants absorb the water through their roots from the earth and carbon dioxide through their leaves.
An Experiment to Investigate the Effect of Light Intensity on the Rate of Photosynthesis. Introduction Photosynthetics take place in the chloroplasts of green plant cells. It can produce simple sugars using carbon dioxide and water causing the release of sugar and oxygen. The chemical equation of photosynthesis is: [ IMAGE ] 6CO 2 + 6H20 C 6 H12 O 6 + 6O2 It has been proven many times that plants need light to be able to photosynthesize, so you can say that without light the plant would neither photosynthesize nor survive.
Photosynthesis is the process in which living cells from plants and other organisms use sunlight to produce nutrients from carbon dioxide and water, the image below “Diagram of photosynthesis 1,” helps show this process. Photosynthesise generally creates oxygen as a by-product through the use of the green pigment, chlorophyll, found in the plant that helps this reaction occur. “Photosynthesis provides us with most of the oxygen we need in order to breathe. We, in turn, exhale the carbon dioxide needed by plants,” (factmonster,2017). This is able to show us why photosynthesis is so greatly needed to occur through plants in order to give one another essentials needed for continuity of life. “Plants perform photosynthesis because it generates the food and energy they need for growth and cellular respiration,” (photosynthesieeducation, 2016).