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Photosynthesis
This category is for questions about the chemical process in which autotrophic organisms use sunlight, carbon dioxide and water to make glucose, water and oxygen. This process is vital to life and is of great importance in biology.
6,415 Questions
How are photosynthesis and cellular respiration connected at the molecular level?
The chemical formula for photosynthesis is: 6 CO2+ 6 H2O →C6H12O6 + 6 O2
Carbon dioxide + Water + Light energy → Glucose + Oxygen
The chemical formula for cellular respiration is: 6 O2 + C6H12O6 → 6 CO2 + 6 H2O
The two are {semi} opposites of each other; photosynthesis makes Glucose from Sunlight, and cellular respiration breaks Glucose down to form Atp - i.e. Useable Energy.
How does the process of CAM photosynthesis work?
In brief, CAM photosynthesis occurs in plants which may have to conserve water. These plants close the stomata in the daylight, and open them at night. Thus conserving most (>90%) of the water otherwise lost due to transpiration.
During the night they absorb CO2 and store it in an acid, hence the CAM - Crassulacean Acid Metabolism.
The Crassulacea refers to a plant family in which the mechanism was first studied - it is NOT the metabolism of Crassulacean Acid. The acid was named after the plant.
Many of the plant families in which this CAM process occur are those that may have to withstand drought. The great variety of Families of plants (both Angisperms and Gymnosperms) covers many hundreds of Genera, indicates that this mechanism has been discovered many times - a natural convergent evolution.
Pineapple and Cacti are very common plants using CAM, but plants such as mosses and Quillworts (Isoetales) also use it. These lowly plants must often have a water problem. Perching orchids are another obvious group of adaptees.
What is the balanced equation for photosynthesis using common terms?
The balanced equation for photosynthesis using common terms is: 6 carbon dioxide + 6 water + light energy -> glucose + 6 oxygen.
What is a raw material needed for the process of photosynthesis?
One raw material needed for the process of photosynthesis is carbon dioxide. This gas is taken in by plants through tiny openings on their leaves called stomata and is used along with water and sunlight to produce glucose and oxygen.
What does carbon dioxide do during photosynthesis?
we take in co2 or carbon dioxide which is released by plant. and we release oxygen which is needed by plants :)
the previous poster is 100% wrong. We do not take in C02 and release oxygen it is the other way around. If you dont know the answer to post one.
Which of the following does not affect photosynthesis rate of a plant?
intensity of light
It is affected by temperature, pH , intensity of light . Other physical factors do not affect much
Which one the following events occurs during Calvin cycle reactions?
This is a copy of my answer to a similar question: The problem Calvin was investigating was how did the carbon in carbon dioxide get converted into the carbon in carbohydrates during phototsynthesis. This meant he had to find a way of tracing the path of the carbon as it was built up into carbohydrate: CO2 ---> substance A ---> substance B ---> etc ---> CH2O (carbohydrate) Calvin discovered the 'Calvin cycle' by choosing a suitable organism to work with, devising a clever piece of apparatus and applying two carefully-chosen techniques. The organism was a single-celled alga called Chlorella. Each cell contains a single, large chloroplast. Because it is single-celled, it can absorb carbon dioxide rapidly and can be killed rapidly, making handling easier than it would be if a larger plant had been used. The apparatus was a flat glass flask called the 'lollipop' apparatus after its shape. The flat shape meant that all of the Chlorella cells inside could receive the maximum amount of light, and so carry out the maximum amount of photosynthesis. With a spherical flask, cells in the middle would receive less light than cells at the outside, and so would photosynthesise less. The first technique he used was to track the path of carbon during photosynthesis by using a radioactive isotope, 14C. This had only recently become available in the 1940's. The advantage of using a radioactive isotope is that it was possible to detect the presence of small amounts of labelled carbon. Calvin added radioactive carbon dioxide to the culture solution containing the Chlorella cells and, after a short time, emptied the cells into a container of alcohol. The alcohol rapidly killed the cells, stopped any further reactions and started to extract the chemicals from them. By varying the time for which the cells were exposed to the radioactive carbon, CAlvin could work out the sequence of chemical reactions through which the carbon was passing. The second technique was two-dimensional paper chromatography. Chromatography is a method for separating mixtures of compounds. A mixture is added as a small spot near the base of a strip of paper. If the paper is dipped in a solvent, it will travel up the paper carrying the mixture with it. However, different substances will be carried different distances, and so the mixture will be separated. After carrying out one separation, Calvin turned the paper through 90o and carried out a second separation using a different solvent (hence the name two-dimensional). This gave a better separation of similar compounds. Having separated the substances which he had extracted from the cells, Calvin then had to find where they were on the chromatography paper! He could not see them because they were colourless. To locate the substances containing the radioactive carbon, he placed a piece of photographic film on top of the paper. The radiation given off by the 14C made the film go dark, so he could then locate where they were on the paper. This technique is called autoradiography. The final step was to identify the compounds containing the 14C. This took about 10 years! At the end, he was able to describe the sequence of compounds through which the carbon passed as it was converted from carbon dioxide to carbohydrate. He discovered that it was in fact a cycle of reactions, hence the name 'Calvin cycle'. He was awarded the 1961 Nobel Prize in Chemistry for this work. For further information see: http://en.wikipedia.org/wiki/Calvin_cycle http://en.wikipedia.org/wiki/Melvin_Calvin http://nobelprize.org/nobel_prizes/chemistry/laureates/1961/calvin-lecture.html
What factors increase or decrease the rate of photosynthesis?
Factors that increase the rate of photosynthesis include higher light intensity, optimal temperature (usually around 25-30°C), and sufficient availability of carbon dioxide and water. Factors that decrease photosynthesis rate include low light intensity, extreme temperatures (too hot or too cold), insufficient carbon dioxide levels, and limited water availability.
Where is photosynthesis and cellular respiration take place?
Photosynthesis occurs in the chloroplast. During photosynthesis, carbon dioxide, water, and light energy is turned into glucose and oxygen. Cellular respiration occurs in the mitochondria. During cellular respiration, glucose and oxygen and turned into carbon dioxide, water, and energy. As you can see, the are both really a big cycle.
What are the 3 major steps of photosynthesis?
The whole process of photosynthesis is not divided into 3, but into 2 steps - light and dark reactions.The dark reactions are also known as the dark phase of photosynthesis and this dark phase is divided into 3 steps.Actually the dark phase is the Calvin cycle which is composed of these 3 major steps:
1. Carbon (or Carbon Dioxide - CO2) fixation
2. Reduction
3. Regeneration (of Ribulose)
The seedlings in the closet had decreased chlorophyll production because they were not exposed to sufficient light for photosynthesis to occur. Chlorophyll is necessary for capturing light energy to drive photosynthesis, so without light, its production decreases.
What is the process that does the opposite to photosynthesis?
The process that is the opposite of photosynthesis is cellular respiration. In cellular respiration, organisms break down glucose to produce energy, carbon dioxide, and water. This process releases energy stored in glucose and is used by all living organisms to power their cellular functions.
Where is the location of the dark reactions in photosynthesis?
The dark reactions of photosynthesis, also known as the Calvin cycle, take place in the stroma of the chloroplasts in plant cells. Here, carbon dioxide is fixed and converted into glucose with the help of ATP and NADPH produced during the light reactions.
How much work is done on a 60-N box of books that you carry horizontally across a 6-M room?
The work done on the box of books is zero since the force applied by carrying it horizontally does not act in the direction of motion. Work is calculated as force multiplied by distance in the direction of the force, and since the force and distance are perpendicular in this case, the work done is zero.
Is chlorine used by plants for photosynthesis?
Chlorine affects plants very much. If you don't add any water to it it will die very fast. Also when you add chlorine to plants, don't spill it on anything, because it stains.
It also affects because chlorine is found in all water and if you don't have chlorine then u have no water which means plant dies
What cell absorbs sunlight for photosynthesis?
Chloroplasts are the organelles within plant cells responsible for absorbing sunlight during photosynthesis. They contain chlorophyll, a pigment that captures light energy and transforms it into chemical energy that is used to drive the process of photosynthesis.
What are all the products for photosynthesis?
The products of photosynthesis are chocolate, fruit, soda, popcorn, and I don't know what else..... I forgot, OK!
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Oh I remember it is carbon, hydrogen and oxygen, I think.
Does the reduction of NAD plus occur in respiration or photosynthesis?
In Photosynthesis, in Non- Cyclic Photophosphorylation, NADP- is produced but is then reduced to NADPH2 which is a reduced coenzyme. The reactions to get from NADP- to NADPH2 are shown below:
- NADP- + H+ ---> NADPH (The H+ came from the hydrolysed water molecule from PSII)
- NADPH + e- ---> NADPH-
- NADPH- + H+ ---> NADPH2
How are the word equations of photosynthesis and respiration similar?
The equation for photosynthesis and respiration are similar but in opposite direction in the sense that what is used in respiration is produced during photosynthesis and what is produced during respiration is again used in photosynthesis. It can be explained by the following equation:-
6CO2 + 6H2O = C6H12O6 + 6O2 (photosynthesis)
C6H12O6 + 6O2 = 6CO2 + 6H2O (Respiration)
They go into photosystem I.
How are photosynthesis and cellular respiration related to the carbon cycle?
Photosynthesis : Uses CO2 and releases O2 into the air.
Respiration: Uses O2 and releases CO2 into the air.
If you look at the equations of photosynthesis and respiration they are the exact reverse of each other.
What does a plant make by photosynthesis process?
After the plant has completed the photosynthesis cycle it has produce water and carbon dioxide. These components are essential for cellular respiration.
What is the four steps in photosynthesis?
Four steps of photosynthesis:
1. Light absorption via chlorophyll in the chloroplast and electrons comes from water producing oxygen
2. Electron transport - NADPH is formed
3. Generate ATP
4. Convert carbon dioxide into carbohydrates
How is photosynthesis important to the tundra?
Photosynthesis in the tundra is important as it is the process through which plants produce energy using sunlight. This energy is vital for the survival of plants and provides food for the animals in the tundra ecosystem. Additionally, photosynthesis helps to regulate the levels of carbon dioxide in the atmosphere, contributing to the global carbon cycle.
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