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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
The plants obtain the reactants through green color pigments that attract light through chloroplasts. The energy from the sunlight is turned into food through out a complicated process. Or it can be used as energy. The food might be sugars on the leaves leaving available for caterpillars. Once the caterpillar gets it's food a bird will eat it and gets it's energy and the process goes on.
What are the organelles that use sunlight to produce food in the process of photosynthesis?
They are the chloroplasts. They carry out photosynthesis
How is light important in photosynthesis and the production of glucose?
Glucose is a sugar molecule. Much like what glucose does for your body, plants metabolize glucose to create CO2 water and energy.
respiration:
H20+C6H12O6=>H20+CO2+ATP(energy)
What is photosynthesis necessary for on earth?
Photosynthesis isn't something that can be created - it's a process by which other products are created.
In photosynthesis, chloroplasts containing chlorophyll capture sunlight energy and use it to free electrons from water molecules. The electrons are then used to create organic biomass in the form of glucose sugars from carbon dioxide. Water and oxygen are created as byproducts in the process.
carbon dioxide + water + light energy ---> glucose + oxygen + water
Why is it important that starch is insoluble?
It's because starch is a polysaccharide. A polysaccharide has thousands and thousands of monosaccharides bonded together. All those bonds make the starch hard to break apart and dissolve in water.
If there is no light coming into the chlorplast how will this effect the Calvin cycle?
Calvin cycle does not need light.So there is no affect.
Through which structure do carbon dioxide and water enter plants?
stomata which are tiny spots on the underside of the leaf
What pigments absorb light energy during Photosynthesis?
chlorophylls a and b absorb blue and green light.
In way are photosynthesis and cellular respiration alike?
Both use electrons carriers and a cycle of chemical reactions to form ATP.
What parts of plants do photosynthesis?
the leaves of the plant contain the pigment chlorophyll, which allows the plant to take in energy from the sunlight. i also think the cells in the leaves are the ones that perfoms ATP to give the plant energy. but, technically even the roots are adapted for photosynthesis because that's the part that takes in water. Water plays a ver important role in photosynthesis.
They are located in the thylakoids, which are in chloroplasts in the mesophyll cells of a leaf.
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Chlorophyll is green therefore it is located in the green parts of a plant.
What are the reactants and products of photosynthesis and cellular respiration?
Reactants carbon dioxide and water in:
light energy + nCO2 + nH2O-->photosynthesis--> (CH2O)n + O2
Reactants carbohydrate (n > 5 to 50.000, e.g. n=6: glucose) and oxygen
reversed:
(CH2O)n + O2-->respiration--> nCO2 + nH2O + 'green' energy
hydrogen ions
What role does chloroplasts and chlorophyll play in photosynthesis?
the chlorophyll is found in the thylakoid membrane. chlorophyll is the pigment that absorbs in red and blue and reflects green, which makes plants look green. chlorophyll captures the sun's energy and is used as energy to complete thephotosynthesis process (light dependent reaction.)
What is the function of the Light dependent resistor?
The resistance of LDR increases when light is not available (or is limited). And the resistance drops when Light is abundant.
This principle can be used in proximity detectors where one or more light source(s) is/are active. When a person / object comes in proximity of the source, the light gets reflected from the object-surface & can now be received by LDR. So due to proximity of the object, resistance of LDR changes - this can be used to trigger different actions like open the door, trigger a motor. Fire an alarm. etc.
Resistance of LDR varies according to intensity of incident light over it,It is used in street light to detect day/night and turn on/off the street light automatically
What is the conclusion importance of photosynthesis in maintaining a balance ecosystem?
Photosynthesis is very important in maintaining a balance in the ecosystem. Carbon dioxide is used by the plants for photosynthesis and oxygen which is used by animals is the by product of photosynthesis.
What three things are used to make glucose on photosynthesis?
The three things essential for the photosynthesis are :
1) Carbon dioxide
2) Water
3) Light
The glucose is synthesize by following process:
6CO2 + 6H2O ----->C6H12O6 + 6O2
The light (not necessarily direct sunlight) is required to catalyze the above reaction.
In which plant cell organelle does photosynthesis take place?
It takes place in the chloroplasts, in the stacks of discs called thykaloids.
When there is not enough oxygen for aerobic respiration what is that called?
During times of insufficient oxygen, the cell undergoes glycolysis, where 2 existing molecules of ATP can form 4 molecules and pyruvic acid. This is an insignificant amount compared to 38 molecules of ATP made by the cellular respiration, which is why it is important to always have enough oxygen.
What is a waste product of photosynthesis that organisms need for cellular respiration?
There are a handful of waste products that are products of a plant's respiration. Oxygen is one such waste product.
Is it true that an increase in light intensity will not increase the rate of photosynthesis?
No, that is not true and increasing light intensity increases the photosynthetic rate, to a point. The saturation point is reached when the reactions in the reaction center have reached top speed and any more light intensity will not increase the rate of photosynthesis.
What simple sugar produced in photosynthesis does a plant use as food?
That is the glucose. It is used for respiration
