0
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
Do plant cells capture energy by way of photosynthesis?
Photosynthesis is not the process of capturing sunlight, it's the process of turning light energy into chemical energy. Plants capture energy through chloroplasts, which is what our solar panels are based on.
Why photosynthesis in plants is low in indoor light than sunlight?
because plants need sunlight to do photosynthesis and with less or no sunlight it will either take long or will not happen at all
Why is green light not absorbed by plants?
Chlorophyll absorbs light and provides the energy for photosynthesis. The wavelength in which chlorophyll works best is in the red and blue range, and therefore does not absorb the green wavelength which is why leaves appear green. There are 2 chlorophyll at work - "a" and "b". They both operate in a slightly different frequency, thus increasing the total energy use from the sun. Chlorophyll "a" operates in the 400-450 & 650-700nm frequencies (purple and red) while "b" operates in the 450-500 & 600-650nm frequencies (blue and orange). They also generally exist in a 3 to 1 ratio, a to b. The gap left (500 - 600nm) is the green zone. In some tree's leaves, the chlorophyll "a" is less dominant, therefore there is an increase in the amount of purple and red wavelengths reflected, hence the leaves are more purple in colour, while the tree is still able to photosynthesize.
How many different groups are there within Islam?
there are 2 main groups shiites and sunnis then there are branches within each
producers
What is the primary plant pigment that absorb sunlight during photosynthesis?
Chlorophyll is the primary pigment that absorbs sunlight during photosynthesis. It is the pigment that is able to absorb the light energy and convert it into chemical energy by loosing electrons easily when struck by light.
Why would the speakers buzz when the lights are on?
You have a ground wire problem. You must make sure your stereo is grounded properly if not, you will get humming, noise , When the lights go on the Wipers, ETC. Find Another Ground for your radio and see what happens. it can help if u put in a filter but i would try running the ground out to the battery. If still buzz move the poss out too. (put a fuse from the bat. to protect that long of a run I had this problem in my 1998 Toyota Sienna with AM/FM/cassette radio and single disc factory CD player (separate unit). The speakers would buzz when the headlamps were on, regardless of sound system mode (radio, cassette, CD). Everything operated normally except for the buzz. Buzzing was intermittent and sensitive to jarring of the dash around the radio. I discovered the 12-pin plug for the CD was not fully seated in its socket at the back of the radio. The CD unit has a light that comes on with the headlamps and dims with the rest of the dash lights. I don't remember if the light in the CD player illuminated with the headlamps when the buzz occured, but it seems likely an intermittent connection to this circuit was the culprit. The fix has been "solid" for several months now. The last thing you want to do is extend any ground wires. It will only allow more noise problems! I am not sure how 'running the ground out to the battery' is much of an answer at all. Keep your grounds as short as possible, as large of diameter wire as possible (within reason for the load) and be sure it has good metal contact to the vehicle chassis. Many times with high current demands for amps, I will drill and clean 5/16" hole in the body for the ground then use a bolt and nut going thru the body to assure a long lasting and trouble-free connection. As stated, do check ALL connections including molexes, line level RCA's and grounds. Dr. DB Retired IASCA Pro 251-500 watts 1986-1994 Yeah man sounds to me like u have a bad ground or a loop in it somewhere.....check the whole wire for and bare wire or cuts.. it seems like the other answers are right but you might want to check for: shorts, bare wires, and bad connections to the rest of the car.
What is it when excited electrons are passed along the electron transport chain?
Energy in sunlight transformed to chemical energy
Process of PhotosynthesisThere are two processes of photosynthesis that a plant utilizes to obtain energy from light. One is the Light Dependent Reaction and the other is the Light Independent Reaction. The equation that can be used to summarize the reaction is6CO2+6H2O C6H12O6+6O2.
The first process, the Light Dependent Reaction involves light entering the thylakoid membrane. The Thylakoid Membrane, which is contained inside the Chloroplast, contains the pigments needed to absorb light. Inside the membrane the water splitting enzyme splits H2O into O2 and a Hydrogen ion (H+, e-). When the light strikes the pigments (Chlorophyll, Arytenoids, Phycobilins) inside the thylakoid, the electrons from the Hydrogen ion become excited. These electrons are then carried by the Electron Transport Chain to activate the Carrier Proteins. These Carrier Proteins transport Hydrogen molecules to the Stroma. From here the Hydrogen molecules are used in two different ways, the formation of ATP and NADPH. The first way, the formation of ATP occurs as the result of the Hydrogen ions becoming hypertonic inside the thylakoid, these ions are diffused out through the thylakoid membrane. After diffusion these Hydrogen ions combine with ADP and a phosphate group to produce ATP. The second way, the formation of NADPH, occurs as the molecule NADP binds with a Hydrogen ion to produce NADPH.
The second process, the Light Independent Reaction (The Calvin Cycle) occurs outside of the Thylakoid in the Stroma as 3 CO2molecules splits into 6 3-Carbon based Compounds. These 3-Carbon molecules, with the assistance of 6ATP and 6NADPH are then converted into 6 3-Carbon sugars. Because the ATP and the NADPH expended all of their accumulated energy, they are converted back into 6ADP and 6NADP, respectively. From here one 3-Carbon sugar such as C6H12O6 is released for the organism to use as energy. The remaining 5 3-Carbon sugars are used to rebuild the original 5- Carbon compound that began the cycle. Three of these cycles are needed to produce a polysaccharide such as Glucose.
Why do cells need to do photosynthesis?
it is happening in plants. It is making carbohydrates for all creatures.
What absorbes any light passing through the retina?
Four kinds of light-sensitive receptors are found in the retina:
- rods
- three kinds of cones, each "tuned" to absorb light from a portion of the spectrum of visible light
- cones that absorb long-wavelength light (red)
- cones that absorb middle-wavelength light (green)
- cones that absorb short-wavelength light (blue)
Each type of receptor has its own special pigment for absorbing light. Each consists of:
- a transmembrane protein called opsin coupled to
- the prosthetic group retinal. Retinal is a derivative of vitamin A (which explains why night blindness is one sign of vitamin A deficiency) and is used by all four types of receptors.
The amino acid sequence of each of the four types of opsin are similar, but the differences account for their differences in absorption spectrum. The retina also contains a complex array of interneurons:
- bipolar cells and ganglion cells that together form a path from the rods and cones to the brain
- a complex array of other interneurons that form synapses with the bipolar and ganglion cells and modify their activity.
Ganglion cells are always active. Even in the dark they generate trains of action potentials and conduct them back to the brain along the optic nerve. Vision is based on the modulation of these nerve impulses. There is not the direct relationship between visual stimulus and an action potential that is found in the senses of hearing, taste, and smell. In fact, action potentials are not even generated in the rods and cones.
The synthesis of ATP by relying on a proton gradient?
Yes, only then can the protons in the intermembrane space move through the ATP synthase into the matrix by diffusion, and as they move through ATP synthase, the enzyme c an harness the available energy thus allowing the phosphorylation of ATP
What is oxygen in photosynthesis used for?
Oxygen is not use.Oxygen is produced in photosynthesis when breaking of water molecules to obtain electrons.
How does a plant receive carbon the dioxide it needs for photosynthesis?
It gets the Carbon Dioxide form the air. It has holes in its leaves to set the air in called 'stomata'.
Where does the process of translation take place in the cell structures take place?
Translation takes place in the ribosomes of the cell. Ribosomes are located in the cytoplasm and on the endoplasmic reticulum. During translation, messenger RNA (mRNA) is decoded to synthesize proteins.
The overall formula for photosynthesis is: 6CO2 + 6H2O + energy (from sunlight) -> C6H12O6 + 6O2. This shows that carbon dioxide and water are converted into glucose and oxygen in the presence of sunlight.
Name another compound produced in the light dependent stage that is used in the Calvin cycle?
ATP and NADPH2 are created in the light dependent stage and are needed for the transformation of GP into TP in the Calvin cycle.
What Do producers release during the process photosynthesis?
Plants release oxygen during photosynthesis.
How does the carbon dioxide enter the leaf in dark reaction?
RUBP or PEP will absorb it. CO2 enter the leaf from air.
What do producers released into the atmosphere during photosynthesis?
The main products that they release into the atmosphere are water vapor and oxygen gas. There are also other molecules that are released in some plants and other producers but, these vary with the plant and are in much lower quantity.
What catches sunlight during photosynthesis?
Photo systems embedded on the thylakoid membranes catches light.
photo systems are of two type PSII and PSI. photo systems consists of chlorophyll and accessory pigments. these catch the sunlight for the process of photosynthesis.
During photosynthesis what green substance absorbes energy from the sun?
The green substance is called chlorophyll. It is a pigment found inside organelles called chloroplasts.
What cell function produces the opposite result of photosynthesis?
That is the respiration. It breaks down glucose.
What is the cellular respiration takes place in the cell is?
The first step, glycolysis, occurs in the cytoplasm. The Krebs cycle and the electron transport chain occur in the mitochondria.
A slogan about the importance of plants and photosynthesis?
Plants are the lungs of the planet and we all know what happens when our lungs stop working.
Can plants carry out photosynthesis using artificial light instead of sunlight?
Absolutely, yes they can. As long as the spectrum of the artificial light includes wavelengths that chlorophyll can absorb.
