What is the connection and difference between light reaction and dark reaction in biology high school?
The difference between light and dark reactions was as follows: - In terms of location, the light reaction occurred on the thylakoid membrane of the plastids, while the dark reaction occurred in the stroma of the plastids, and part of the process ended in the plastids. - In terms of conditions, the light reaction required light, vitamins, and other colors and zymes; the dark reaction required a variety of related zymes, but did not require light. - In terms of material changes, the light reaction occurs in the photodecomposition of water and the formation of ATPs; the dark reaction occurs in the fixing of CO2 and the reduction of C compounds. - In terms of energy change, in the light reaction, light energy is converted into active chemical energy in the ATP-based energy conversion process, and the energy conversion process is light energy-electric energy-active chemical energy; in the dark reaction, the active chemical energy in the ATP-based energy conversion process is stable chemical energy in the (CH ^O)-based energy conversion process. - In terms of reaction time, the light reaction took place in a short time, measured in microseconds, while the dark reaction took place slowly. The relationship between light and dark reactions was as follows: - The light reaction product [H] was the reducing agent of the carbon dioxide in the dark reaction, and the dark reaction was powered by the ATP. - The dark reaction produced AAD and Pi, which provided the raw materials for the light reaction to form ATP. - The normal operation of the dark reaction requires the [H] and the [ATP1] provided by the light reaction, in addition to the external conditions (such as carbon dioxide and suitable temperature). The dark reaction could be carried out with or without light. If the light reaction stopped, the dark reaction could continue for a period of time, but not for a long time. If the dark reaction was blocked, the light reaction would not be able to proceed normally due to the accumulation of products. The two were mutually restricted and closely related. Read more exciting novels for free
High school biology light reaction dark reaction video lecture teaching
The following is a suggestion for the teaching content of the high school biological light reaction and dark reaction video lecture: ** 1. Light reaction part ** 1. ** Opening Introduction ** - The importance of photosynthesis as a whole could be emphasized. It was the source of most biological energy and organic matter on Earth, and the light reaction was the critical initial stage of photosynthesis. - Show some natural phenomena, such as green plants growing luxuriantly under the sun, etc., to arouse students 'interest and induce light reactions. 2. ** Light reaction site ** - Illustrate the structure of the plastids through animations or pictures, emphasizing the thylakoid membrane, and tell the students that this is where the light reaction takes place. It could be likened to a specialized "light energy conversion factory." - The thylakoid membrane had important substances such as photosynthesis, which were the key factors for the light reaction. 3. ** Light reaction conditions ** - It was clearly stated that the light reaction required light, photosynthesizing dye, and the three main conditions for the reaction. - As for light, explain the effects of light of different wave-lengths on photosynthesis, and show the absorption spectrum of the photosynthesizing dye, indicating that the main absorption of the red light and blue-purple light by the chopstick. - As for the photosynthesizing dye, the structural characteristics and functional differences of the two could be described in detail. For example, the light energy absorbed by the dye could be converted into energy, while the light energy absorbed by the dye could be converted into energy. Caroteroids could help to absorb light energy and protect the dye. - Mentioning the role of the catalyst, he emphasized the high efficiency and specialty of the biochemical reaction. In the light reaction, the catalyst played a role in promoting the transformation of various substances. 4. ** Light reaction, substance change ** - The photodecomposition process of water was shown in an animated form. Water was decomposed into oxygen, hydrogen ions (H) and electrons (e) under the action of light energy and microorganisms. It was emphasized that oxygen was an important product of the light reaction and would be released into the external environment. - Then, it showed the process of hydrogen ions forming a photon concentration grads in the thylakoid cavity, driving AAD and Pi to synthesize ATP. This process emphasized the conversion of energy, that is, the conversion of light energy into chemical energy stored in ATP. - At the same time, it showed the process of hydrogen ions combining with NRIDP2 to form NRIDPM ([H]) outside the thylakoid body. It explained that NRIDPM was also a substance that carried energy, and it had reducing properties, which would play an important role in the dark reaction. 5. ** Light reaction energy change ** - The energy change in the light reaction was summarized. After the light energy was absorbed by the photosynthesizing dye, it was converted into chemical energy in the form of bound bound This process could be represented by a diagram of energy flow, starting from light energy and flowing to the chemical energy of Ang P and Ang P. ** 2. Dark reaction part ** 1. ** Dark reaction site ** - He showed a picture of the structure of the plastids and pointed out that the place where the dark reaction occurred was the plastids matrix, which was different from the thylakoid membrane where the light reaction occurred. It could be likened to a "chemical synthesis workshop." - It was emphasized that although the dark reaction had the word "dark" in its name, it did not mean that it could only be carried out in the dark. As long as there was a light reaction to provide substances such as Ang, Phosphatease, and carbon dioxide, it could also be carried out normally under light conditions. 2. ** Dark Reaction Condition ** - The main emphasis was on the need for ATP-Na, ADMPH, carbon dioxide, and a variety of membranes. - It explained that Ang-2 and Ang-3 were energy and reducing agents provided by the light reaction, carbon dioxide was the raw material for the dark reaction, and the protein was used to catalyze the various chemical reaction steps in the dark reaction. 3. ** Dark Reaction Matter Change ** - Illustrate the Calvin Cycle process with an animation. The first step was to fix carbon dioxide. Under the catalyst of the catalyst, carbon dioxide combined with a five-carbon compound (C5, RuBG) to form two three-carbon compounds (C3). - Then, the reduction process of C3 was demonstrated. C3 was reduced to organic substances such as sugar (CH <anno data-annotation-id ="0000004 - 4444 - 4444-a888 - 8888888888844"> O </anno>) with the energy provided by ATP-bound and the hydrogen provided by ADMPH. At the same time, some C3 was regenerated into C5 after a series of changes. It was emphasized that this was a circular process, and the regeneration of C5 ensured the continuation of the dark reaction. 4. ** Dark reaction energy change ** - This meant that the energy change in the dark reaction was the conversion of chemical energy in the ATPs into chemical energy in the organic matter. In this process, the energy was stored for plant growth, development, and other life activities. ** 3. The relationship between light reaction and dark reaction ** 1. ** Material Connection ** - Make a table or chart to compare the material changes in the light reaction and the dark reaction, and clearly indicate that the light reaction provides the dark reaction with ATP-P, and the dark reaction provides the light reaction with AADP-P, Pi, and ADP-P. - For example, arrows were used to indicate the direction of the flow of matter. The arrows of Ang, Ang, and Ang were used to indicate the flow of matter from the light reaction to the dark reaction, and the arrows of Ang, Ang, and Ang. 2. ** Energy connection ** - Once again, the light reaction converted light energy into chemical energy (the chemical energy in the form of ATPs and ADPs), and the dark reaction used this chemical energy to synthesize organic matter and store energy. The two formed a continuous process of energy transfer and conversion. - This connection could be visualized using a diagram of energy flow. It started with light energy, converted into chemical energy through light reactions, and then stored in organic matter through dark reactions. ** 4. Summing Up and Consolidating Practice ** 1. ** Summing Up ** - The location, conditions, material changes, and energy changes of the light reaction and dark reaction were summarized in a comprehensive manner. The characteristics and connections of the two reactions were summarized in concise language. - Students could review and construct a process diagram of the light and dark reactions in their minds. Then, they could be asked to describe the process to test the student's mastery. 2. ** Consolidating Practice ** - Give some practice questions related to light and dark reactions. For example, when the light is suddenly stopped or the carbon dioxide supply is suddenly stopped, how will the content of substances in the light and dark reactions (such as C3, C5, Ang, ADPM, etc.) change? Ask the students to analyze the reasons. - Some practical experimental phenomena could be given, such as measuring the amount of oxygen released and carbon dioxide absorbed by plants under different light intensity, so that students could judge the progress of light and dark reactions. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The characteristics of secondary reaction in high school biology
The secondary immune response could produce a large number of antibodies very quickly (with the presence of memory cells), while the primary immune response was slower. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The difference and connection between chemical reaction and physical reaction
There were the following differences between a chemical reaction and a physical reaction: - The essential difference was that a chemical reaction was the reaction of two or more substances to produce a new substance. During the reaction, the molecules were broken into atoms, and the atoms were rearranged and combined to form a new substance. A physical reaction was a change in the state or existence of the substance, but the nature of the substance itself did not change, and no new substance was formed. - From a microscopic point of view, chemical reactions involved ion exchange, electron gain and loss, and so on, while physical reactions were changes in shape, color, size, state, and so on. There was a connection between the two: - A chemical reaction must have a physical reaction, because the microscopic explanation of a chemical reaction was physical. A chemical reaction was actually an electrokinetic problem under the effect of an electric field. Chemistry could be seen as a branch of physics. As long as there was a chemical change, there would be a physical change, but there might not be a chemical change when there was a physical change. - Many changes included both physical and chemical changes. To determine which change belonged to which one needed to look at which one was dominant. For example, the dissolution of different substances could have both physical and chemical changes; firing porcelain was also a process that had both physical and chemical changes; raw rice cooked rice also had both physical changes (the breakdown of starch granules) and chemical changes (starch turning into starch). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The difference and connection between the macro reaction and the micro reaction
What is the difference and connection between reaction and foresight?
A reaction refers to the corresponding changes in the body's response to changes in the external environment or stimulation, including the body's response, feedback of opinions, attitudes, or actions, the reaction to daily social events, and the corresponding activities caused by the organism being stimulated. For example, a person's discomfort after taking a certain medicine was a reaction, and the mimosa leaves closing due to being touched was also a reaction. Foreseeing was the ability to predict what would happen in the future. For example, some people could foresee the development trend of the Internet and make corresponding decisions when it had not yet emerged or had just sprouted. The connection between the two was that predicting a certain situation could allow one to prepare in advance for the upcoming reaction. For example, the leader could foresee possible problems within the team (such as changes in the employee's mentality, etc.) and take measures in advance to prevent small problems from developing into major conflicts, which was to avoid the occurrence of adverse reactions. The ability to foresee could help guide and respond to reactions, and observing and analyzing reactions could also improve the ability to foresee. This was because by summarizing past reactions, one could better judge the development direction of similar situations in the future. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The difference between quick reaction and conscious reaction
Rapid response was an immediate response to changes in the situation. It was an outstanding strategic awareness, reflecting the importance and sensitivity of objective strategic problems. It was an ability for people to consciously capture, plan, and solve strategic problems. For example, in a competitive scene, one could detect the changes in the situation before others and react quickly. This was an effective way to win the competition, preserve oneself, and defeat the opponent. There was no clear definition of conscious response, but from some examples (such as the reaction of a large truck suddenly changing lanes in a driving scene), it could be inferred that conscious response involved a reaction based on understanding, experience, or knowledge of a specific situation. If there was only a quick reaction but no conscious reaction, it might lead to improper countermeasures. It was like seeing a large truck suddenly change lanes while driving. A quick reaction was to act quickly, but if the conscious reaction was insufficient, it might not take into account that there might be a situation in front of the truck. Blindly changing lanes could cause danger. The correct conscious reaction should be to brake. In short, rapid reaction emphasized the speed of reaction, while conscious reaction focused more on the rationality and accuracy of the reaction. The two were different but related. In actual situations, they often needed to work together. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The difference and connection between reaction heat and combustion heat
The heat of reaction refers to the heat released or absorbed by the system when the temperature of the product returns to the initial temperature of the reagent after the chemical reaction occurs under constant pressure and without non-expansion work. It is the heat released or absorbed by the system when the chemical change occurs in the process of constant temperature and constant pressure. The heat of combustion is the heat released when 1 mole of pure substance is completely burned to form a specified product at 101 kPa. The difference between the two was: 1. The heat of reaction was a broader concept, covering the heat changes in various chemical reactions, while the heat of combustion was specific to the reaction of complete combustion of matter and oxygen. 2. The heat of reaction occurs under the conditions of constant temperature, constant pressure, and no non-expansion work. The heat of combustion is clearly defined as the heat of complete combustion of 1 mole of pure substance under 101 kPa. 3. The calculation of the heat of reaction is related to the type of reaction, the amount of substance, and the degree of reaction. The heat of combustion is only the heat of the complete combustion of 1 mole of pure substance to produce a specified product. The connection between the two was that the heat of combustion was a special form of reaction heat. The measurement of the heat of combustion could help to calculate the heat of formation of a compound, the heat of reaction of a chemical reaction, and the bond energy. The data of the heat of combustion could provide a basis for the calculation and research of the heat of reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
High School Chemistry 4 Reaction Devices
The common reaction devices in middle school chemistry included the following: 1. ** Test tube reaction device **: - Can be used at room temperature or under heating conditions. It could be used as a reaction vessel for a small amount of reagents at room temperature or when heated. It could also be used to dissolve a small amount of solid and collect a small amount of gas. It could also be used as a small gas generator. When heating, the outer wall must be dry. It cannot be suddenly heated and cooled. Generally, it must be evenly heated first before it can be concentrated. When heating solid, the mouth of the test tube should be slightly inclined downward, and the test tube cannot stand upright before it is cold. When heating liquid, the amount of liquid should generally not exceed 1/3 of the volume of the test tube, so that the test tube and the table form an angle of about 45°. The liquid in the test tube during the reaction should not exceed 1/2 of the volume of the test tube. The test tube clip should be clamped in the upper middle of the test tube (or the iron clip should be clamped 1/3 away from the test tube mouth). 2. ** Beaker reaction device **: - It could be used to dissolve solid substances, formulate solutions, dilute and concentrate solutions, and could also be used for reactions between large amounts of substances. When heated, the outer wall should be dry, and placed on the gauze to make it evenly heated. The amount of liquid added should generally not exceed 1/2 of the volume. 3. ** Flask reaction device **: - There were round-bottom flasks and flat-bottom flasks. Round-bottom flasks were generally used as reaction vessels under heating conditions. They could be used for reactions between large amounts of liquids, and could also be used as gas generators. The bottom of the round-bottom flask was relatively uniform in thickness and had no edges. It could be used for long-term strong heat. When heating, it should be placed on an earthworm net and could not be heated directly with a flame. Flat-bottomed flasks were used for gas generators without heating, and were also commonly used to assemble washing bottles. Due to the small bottom plane, the edges were sharp, and the stress was large, it was easy to explode when heated, so it was generally not used for reaction vessels under heating conditions. 4. ** Conical Flask Reaction Device **: - It is commonly used in reactions involving liquids and can be used to assemble gas generators. Usually, it needed to be indirectly heated with a cushion of gauze to make the heat uniform and prevent the instrument from cracking due to uneven heating. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
High School Four Reaction Patterns
高中化学四大基本反应类型包括化合反应、分解反应、置换反应、复分解反应，以下为各反应类型的例子： 1. **化合反应**：由两种或两种以上物质生成另一种物质的反应，例如\(C + O_{2}\stackrel{点燃}{=\!=\!=} CO_{2}\)。 2. **分解反应**：一种物质生成两种或两种以上其他物质的反应，例如\(CaCO_{3}\stackrel{高温}{=\!=\!=} CaO+CO_{2}\uparrow\)。 3. **置换反应**：一种单质和一种化合物反应生成另一种单质和另一种化合物的反应，例如\(Zn + H_{2}SO_{4}=\!=\!= ZnSO_{4}+H_{2}\uparrow\)（参考常见置换反应类型补充）。 4. **复分解反应**：由两种化合物互相交换成分，生成另外两种化合物的反应，例如\(HCl + NaOH=\!=\!= NaCl + H_{2}O\)（参考常见复分解反应类型补充）。 另外，在有机化学中还有一些特殊的反应类型，如取代反应（如烷烃与卤素单质的取代反应）、加成反应（如乙烯与溴的加成反应\(CH_{2}=CH_{2}+Br_{2}\longrightarrow CH_{2}BrCH_{2}Br\)）、消去反应（如乙醇在浓硫酸作用下的消去反应生成乙烯等）等，但这些不属于高中化学四大基本反应类型。 <a href="/?from=ask_words" style="color:red" target="_blank">点击前往免费阅读更多精彩小说</a>
Junior high school chemistry fluorescent reaction
There were many situations in the fluorescent reaction in junior high school chemistry. Some of the simple compounds that contain either the Lanthanide series or the Actinide series emit fluorescence under violet light. For example, in some experiments, mixing the chemicals in the red glow stick together and adding a solution of soda could produce beautiful red fluorescent droplets. There was also the fluorescent experiment of the fluorescent substance, which was to first add the solution of the fluorescent substance into the water, then add the fluorescent substance into the solution after dissolving it. Under the illumination of a purple light, the prepared solution would produce a fluorescent phenomenon when dripped into the water. The rare earth luminous powder kirakira on the market also had fluorescent properties. There were also common fluorescent materials that were lit up with blood or iron. Adding other fluorescent dye could also get different colors of fluorescence. Bis-esh-esh fluorescent ester could be used as a light stick. With the addition of different fluorescent dye, all colors of fluorescence and even infrared light could be obtained. In addition, many chemicals would produce fluorescence under different reaction conditions or combinations. For example, the luminol light reaction could be used to replicate the blue light effect of the " blue tears." In the experiment of the nitrogen fountain, the mixture of the luminol solution and the disinfectant solution could also emit blue light. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>