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What is the main role of pigment molecules within the antenna or light harvesting complex?
The light-harvesting (or antenna) complex of plants is an array of protein and chlorophyll molecules embedded in the thylakoid membrane which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem.
How do you compare the different roles of photosystem 1 and photosystem 2 in photosynthesis?
The structure of photosystem I in a cyanobacterium ("blue-green alga") has been completely worked out. It probably closely resembles that of plants as well. It is a homotrimer with each subunit in the trimer containing: * 12 different protein molecules bound to * 96 molecules of chlorophyll a ** 2 molecules of the reaction center chlorophyll P700 ** 4 accessory molecules closely associated with them ** 90 molecules that serve as antenna pigments * 22 carotenoid molecules * 4 lipid molecules * 3 clusters of Fe4S4 * 2 phylloquinones Photosystem II is also a complex of * > 20 different protein molecules bound to * 50 or more chlorophyll a molecules ** 2 molecules of the reaction center chlorophyll P680 ** 2 accessory molecules close to them ** 2 molecules of pheophytin (chlorophyll without the Mg++) ** the remaining molecules of chlorophyll a serve as antenna pigments. * some half dozen carotenoid molecules. These also serve as antenna pigments. * 2 molecules of plastoquinoneSource: http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/L/LightReactions.html
What is a group of couple of hundred chlorophyll a chlorophyll b and carotenoid molecules that act as a light gathering unit called?
That group is called a "photosystem." It plays a key role in the process of photosynthesis by capturing light energy and converting it into chemical energy, which can be used by the plant. A photosystem consists of various pigment molecules, including chlorophyll a, chlorophyll b, and carotenoids, that work together to absorb different wavelengths of light.
Where do electrons get their energy in photo system 1?
In very general terms, electron transfer is caused by photoexcitation of the pigment molecules in the antenna complex. The chlorophyll and carotenoid molecules in the antenna complex become photoexcited when they absorb any wavelengths of visible light and then transmit resonant energy.
What the function of antenna molecule?
Antenna molecules in photosynthesis capture light energy and funnel it to the reaction center where the energy is used to drive the process of photosynthesis. They help to increase the efficiency of light absorption by extending the range of wavelengths that can be utilized for energy conversion.
What is a group of a couple of hundred chlorophyll a chlorophyll b and carotenoid molecules that act as a light GAA chlorophyll b and carotenoid molecules that act as a light gathering unit calle?
Antenna Assembly
What is the main role of pigment molecules within the antenna or light harvesting complex?
The light-harvesting (or antenna) complex of plants is an array of protein and chlorophyll molecules embedded in the thylakoid membrane which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem.
How do you compare the different roles of photosystem 1 and photosystem 2 in photosynthesis?
The structure of photosystem I in a cyanobacterium ("blue-green alga") has been completely worked out. It probably closely resembles that of plants as well. It is a homotrimer with each subunit in the trimer containing: * 12 different protein molecules bound to * 96 molecules of chlorophyll a ** 2 molecules of the reaction center chlorophyll P700 ** 4 accessory molecules closely associated with them ** 90 molecules that serve as antenna pigments * 22 carotenoid molecules * 4 lipid molecules * 3 clusters of Fe4S4 * 2 phylloquinones Photosystem II is also a complex of * > 20 different protein molecules bound to * 50 or more chlorophyll a molecules ** 2 molecules of the reaction center chlorophyll P680 ** 2 accessory molecules close to them ** 2 molecules of pheophytin (chlorophyll without the Mg++) ** the remaining molecules of chlorophyll a serve as antenna pigments. * some half dozen carotenoid molecules. These also serve as antenna pigments. * 2 molecules of plastoquinoneSource: http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/L/LightReactions.html
What is a group of couple of hundred chlorophyll a chlorophyll b and carotenoid molecules that act as a light gathering unit called?
That group is called a "photosystem." It plays a key role in the process of photosynthesis by capturing light energy and converting it into chemical energy, which can be used by the plant. A photosystem consists of various pigment molecules, including chlorophyll a, chlorophyll b, and carotenoids, that work together to absorb different wavelengths of light.
Where do electrons get their in photosystem 1?
In very general terms, electron transfer is caused by photoexcitation of the pigment molecules in the antenna complex. The chlorophyll and carotenoid molecules in the antenna complex become photoexcited when they absorb any wavelengths of visible light and then transmit resonant energy.
Where do electrons get their energy in photo system 1?
In very general terms, electron transfer is caused by photoexcitation of the pigment molecules in the antenna complex. The chlorophyll and carotenoid molecules in the antenna complex become photoexcited when they absorb any wavelengths of visible light and then transmit resonant energy.
What is the difference beyween photosystem 1 and photosystem 2?
The structure of photosystem I in a cyanobacterium ("blue-green alga") has been completely worked out. It probably closely resembles that of plants as well. It is a homotrimer with each subunit in the trimer containing: * 12 different protein molecules bound to * 96 molecules of chlorophyll a ** 2 molecules of the reaction center chlorophyll P700 ** 4 accessory molecules closely associated with them ** 90 molecules that serve as antenna pigments * 22 carotenoid molecules * 4 lipid molecules * 3 clusters of Fe4S4 * 2 phylloquinones Photosystem II is also a complex of * > 20 different protein molecules bound to * 50 or more chlorophyll a molecules ** 2 molecules of the reaction center chlorophyll P680 ** 2 accessory molecules close to them ** 2 molecules of pheophytin (chlorophyll without the Mg++) ** the remaining molecules of chlorophyll a serve as antenna pigments. * some half dozen carotenoid molecules. These also serve as antenna pigments. * 2 molecules of plastoquinoneSource: http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/L/LightReactions.html
The antenna system of a plant that gathers the solar energy consists of?
The antenna system of a plant consists of specialized structures called chloroplasts, which contain chlorophyll pigments. These pigments absorb sunlight and convert it into chemical energy through the process of photosynthesis. The antenna system helps capture and funnel light energy to maximize the plant's energy production.
What is contained in each photosynthetic unit of photosystem 1?
Photosystem I contains photosynthetic units with :- 200 or more molecules of chlorophyll a,- small amounts of chlorophyll b- protein saddled carotenoid pigment,-a pair of specialized reaction-center molecules of chlorophyll called P700
Why are plants steams green?
Plants are green because they have a substance called chlorophyll in them. Understanding why chlorophyll is green requires a little biology, chemistry and physics. If we shine white light on chlorophyll, its molecules will absorb certain colors of light. The light that isn't absorbed is reflected, which is what our eyes see. A red apple appears red because the molecule of pigment in the apple's skin absorbs blue light, not red. Thus, we see red. Chlorophyll molecules absorb blue light and some red light. The other colors are reflected resulting in the green color that we associate with plants. Plants get their energy to grow through a process called photosynthesis. Large numbers of chlorophyll molecules acts as the antenna that actually harvest sunlight and start to convert it in to a useful form. Here's where the absorbent properties of the chlorophyll molecule come into play. It turns out that eons of evolutionary design have matched the absorbance of chlorophyll to the actual color of the sunlight that reaches the leaves. Sunlight consists of primarily blue and red light mixed together, which are exactly the colors that chlorophyll molecules like to absorb. Light is a form of energy, so the chlorophyll is able to harvest the sunlight with little waste.
What the function of antenna molecule?
Antenna molecules in photosynthesis capture light energy and funnel it to the reaction center where the energy is used to drive the process of photosynthesis. They help to increase the efficiency of light absorption by extending the range of wavelengths that can be utilized for energy conversion.
Antennalike energy-harvesting unit in a thylakoid?
Antenna pigments, chlorophyll a, chlorophyll b, and carotenoids, that are light harvesting antennas in the thylakoid. After the antenna pigments absorb light energy and transformed as chemical energy then transfered to the reaction center complex.
