The answer to the 2005 National Biology League
Here are the answers to some of the questions in the 2005 National Biology League: 1. The function of the mitochondria is to produce ATP. The answer is D. 2. The effect of colchexin on cells was to suppress cell division. The answer was B. 3. The conversion of prohormone into hormone is carried out in the Golgi apparatus. The answer is C. 4. The high-energy phosphorus compound that participated in the most energy-supplying reactions in the body was adenosinetrimonium. The answer was B. 5. In biological information transmission, there was no experimental evidence of protein →DNA. The answer was D. 6. The sporangium was the structure in which fungi formed spores. The answer was A. 7. The substances produced by pathogenic microorganisms that interfere with the physiological functions of the body's cells and tissues are toxins. The answer is A. 8. Human malaria is a disease caused by protozoa. The answer is A. 9. The type of the protein in bacteria is the same as that of higher organisms, so the statement that the type of the protein in bacteria is different from that of higher organisms is incorrect. The answer is B. 10. A photosynthesizing unit includes the antenna dye system and the dye molecules in the reaction center. The answer is A. 11. Glycernal-2 -monophate was not a product of the glycolystic process. The answer was C. 12. The alpha carbon atoms of the aa that make up the protein are not symmetrical, with the exception of gly. The answer is C. 13. The structure of the bacteria that was directly affected by Penicilin was the cell wall. The answer was A. 14. Prokarytes all have Ribosome. The answer is B. 15. Prokaryonic cells did not have mitochondria. The description of " all cells have mitochondria as energy-producing organelle " was wrong. The answer was C. 16. The K+ channel allows K+ to pass, but Na+ and Ca2 + do not. The answer is A. Read more exciting novels for free
2020 National Biology League Answer Analysis
The following are some of the answers to the 2020 National Middle School Biology League questions: 1. In the traditional Trizol method for extracting the DNA, the following compounds were used: - The main components of Trizol were carbolic acid and guanidinium thionate. The carbolic acid could dissolve the protein and lyse the cells, releasing the protein/nuclear acid substances. Therefore, option A was correct. - The function of the chopstick was to help the separation of the water phase from the organic phase and to remove the compounds in the solution, so option B was correct. - Chloric acid didn't denature the DNA. Option C was wrong. - Chloric acid could remove some fat-dissolved impurities in the sample, such as oil and fat-dissolved colors. Option D was correct. Therefore, the answer to this question was an ABD. 2. Regarding the secondary structure of the green fluorescent protein, the green fluorescent protein was surrounded by a cylindrical fence: - The region where the larger R's (such as phe, pt, and ip) were concentrated would hinder the formation of the alpha helices, so option A was wrong. - The side chain of gly was too small, so its conformations were unstable and destroyed the formation of the alpha helices. Option B was wrong. - Phe can form a beta-sheet. Option C is correct. - The peptidic chain contains a protein that can form a beta-sheet. Option D is correct. Therefore, the answer to this question was CD. 3. The purification method of the Green Phosphorescence from the E. Coli lysed solution containing the Green Phosphorescence protein with the N-terminal 6*His tag: - According to the difference in the surface of the protein, the interaction between the protein and the surface of the medium was used to separate the protein. - Ion exchange separation of protein was based on the different charges of the protein under a certain pH. - Immobilized metal ion affinity column was a method for separating and purifying His-tag protein. This gel could specifically chelate with the His-tag protein, so that the protein was firmly attached to the gel through the metal ion. Other impurity protein could not be chelated with the metal ion because it did not carry the purification tag, so it could not be attached to the gel. - Gel-phase separation was a technique that used the molecular sieve effect of the particles with a multi-pore network structure to perform elution-separation based on the difference in the relative molecular mass of the components in the sample to be separated. Therefore, immobilized metal ion affinity column was the first choice for purification of the GFlp from the E. Coli lysed solution containing the GFlp protein with the N-terminal 6*His tag. The answer was C. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2017 Zhejiang Province National Biology League
The 2017 Zhejiang Province National Biology League was as follows: - In the National Middle School Biology League (Zhejiang Division) competition, Group A (Class I Key Middle School Group) had 38 first prize winners, 194 second prize winners, and 298 third prize winners; Group B (Non-Class I Key Middle School Group) had 77 first prize winners, 384 second prize winners, and 580 third prize winners. - In terms of the overall results of the National Middle School Biology League, 1 - 61 people won the first prize, 62 - 261 people won the second prize, and 262 - 561 people won the third prize. Among them, the top students were from many schools, such as Xiaoshi Middle School in Ningbo City, Hangzhou Xuejun Middle School in Zhejiang Province, Zhenhai Middle School in Ningbo City, etc. The top three were Zhang Zhiyi.(Total T-value: 73.26113207), Zhu Hu Minhao (Total T-value: 73.1891269), Huang Yueying (Total T-value: 71.71424172) <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2011 National Biology League answers and answers
Here are some of the answers to the 2011 National Biology League questions: 1. The organelle without a photon pump was the ER (Option A). 2. The mobility of a biological membrane was manifested by the fact that both membrane lipidsand membrane protein were mobile (Option A). 3. Transmembrane transport of Na and K, as well as co-transport, belonged to active transport (options A and C). 4. The main component of the Spindle formed during cell division is the microtubulus (Option C). 5. The description of the cell membrane breaking rapidly in the description of cell death is incorrect (Option D). 6. Both the plastids and the mitochondria contained protein, both contained H+-binding cozymes, and both produced ATPs (options A, B, and E). 7. The main function of the nucleus was the biogeneration of the Ribosome (Option B). 8. The best time to observe the quadrants of the same species during Meiosis was the pachyphakinete stage (Option C). 9. The base sequence of the template DNA was 5'-TGACCG-3', and the base sequence of the transcribed DNA was 5'-ACGUA-3'(Option B). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2023 National Biology League Hunan Division
In the 2023 National Biology League for Middle School Students (Hunan Division), many students won awards. For example, Peng Chengyuan and Zhao Ruoxi from Changsha City No.1 Middle School and Chengnan Middle School won the provincial first prize and third prize respectively; Long Hao from Taojiang No.1 Middle School and Xia Yingzhou from Taojiang No.4 Middle School won the first prize of the Biology Olympiad; Liu Junchi and Hu Jie from Hengyang City No.8 Middle School, Liu Zhenyan from Qidong County No.2 Middle School and Xiao Zhixiang from Qidong County Yuxian Middle School won the first prize. Hengyang organized 132 students from 23 high schools to participate in the competition and won 42 awards, including 4 first prizes, 12 second prizes and 26 third prizes. A student from Xintian High School won the second prize in the national competition. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2020 Biology League Test Paper Analysis Answer
The answers to the 2020 National Middle School Biology League questions, including the review draft, are as follows: 1. In the traditional Trizol method for extraction of DNA, the following statements are correct (multiple choices)() - Because the main components of Trizol are carbolic acid and guanidinium thionate, it can dissolve the protein and lyse the cells, releasing the protein/nuclear acid substances. A is correct. - It can be used to extract the remaining acids in the sample, which helps to separate the water phase from the organic phase and remove the acids in the solution. - DNA could not be denature by the use of helium, C error; - It could remove some fat-dissolved impurities in the sample, such as oil and fat-dissolved colors, etc. D was correct. Therefore, the answer was an A B D. 2. The cylindrical fence around the green fluorescent protein was a secondary structure of the protein (as shown in the picture). Regarding the secondary structure and the commonly seen aa in the structure, the correct combination is (multiple choice)(): The answer is CD. (As the reference materials did not provide a complete analysis of all the answers, only the analysis of the above answers can be provided.) <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
National College Entrance Examination Volume 1 Biology 2021 Answer
The answers to the Science Comprehensive Ability Test (Biology) of the National Unified Examination for College Entrance Examination in 2021 are as follows: 1. Multiple choice questions: 1. D (Mitotic DNA is located in the mitochondria matrix, not on the outer membrane of the mitochondria, and it codes for the metabolism. Option A, the existence of an electron capture protein on the thylakoid membrane of the plastids is correct; Option B, the release of the electron capture protein after the rupture of the lysomal membrane is also correct; Option C, the nuclear membrane of the cell is a double-layered membrane structure, and the nuclear pore is the channel for substances to enter and exit the nucleus. 2. B (There is also a Dna-protein complex in the karyoid of a procaryotic cell). 3. A (wheat cannot directly absorb and utilize the N <2> in the soil. Plants mainly absorb nitrogen ions such as NO - 3). 4. C (According to the diagram and the relationship between drug X and drug D in the question, the description of option C is unreasonable). (Since the answers to the non-multiple choice questions were not obtained, only partial answers to the multiple choice questions can be provided.) <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2018 Biology League Shandong
In 2018, there were many biological competitions in the Shandong Division. In the 2018 National Biology Olympiad League, students from a certain county performed well and won one first prize, two second prizes, and nine third prizes. Their results were among the best in Weifang City. At the same time, in the 2015 National Middle School Biology League (Shandong Division), the preliminary examination questions for the high school group included 80 single-choice questions with a total of 80 points, 20 multiple-choice questions with a total of 40 points, with a full score of 120 points. The examination time was 90 minutes, and there were clear requirements for the filling of the answer sheet and the way to answer it. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2023 Biology League, Shandong Province
The 2023 National Biology League for Middle School Students (Shandong Province) would be held in Jinan City. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to train for the National Biology Olympiad
The Biology Olympiad Course drew on a lot of information. It could expand the scope of knowledge and increase the amount of information. It also reflected the development trend of biological science and could be used to learn related knowledge. "The Complete Collection of Methods to Solve Problems in the High School Biology Olympiad" had methods to guide, thinking development, example analysis, and targeted training. The methods were flexible and ingenious, the question types were comprehensive, the thinking was clear and smooth, and the comments were just right. It could be used to improve the ability to solve problems. In addition, the (free) high school biology Olympiad training questions and analysis provided by the subject network could also be used for training. However, there was no information on how to train for the National Biology Olympiad. Sorry, I couldn't give an accurate answer. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2023 Biology League results announced in Hunan
The results of the 2023 National Biology League for Middle School Students (Hunan Division) were announced. For example, Peng Chengyuan and Zhao Ruoxi from Changsha City No.1 Middle School and Chengnan Middle School won the provincial first prize and third prize respectively; Hengyang students won 42 awards, among which Liu Junchi and Hu Jie from Hengyang City No.8 Middle School, Liu Zhenyan from Qidong County No.2 Middle School and Xiao Zhixiang from Yuxian Middle School of Qidong County won the first prize. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>