Yu Bingcheng's "reviewing well" is not a lie. As soon as he finished speaking, he took out "Biochemistry" and read it carefully.?                                                                                                            

?Liu Jian also ended his onlooker and focused on gnawing on his "Cell Biology". - Because the exam is imminent.

The so-called "exam" is not the final of the Biology Olympics in two months, but the Olympic training class graduation exam.

The graduation exam seems ordinary, but in fact, for most students, its importance is no less than that of the national Olympic finals. Because many of the questioners in the graduation exam are teachers from Jinling University, Soochow University, and Liangjiang Normal University. Their existence represents the school to test the students' qualities. As long as they can get the admission qualification, it is no problem to get the admission qualification. For those students who are hopeless to win the national competition and have relatively average grades of other subjects, it is already very satisfying to be able to attend second-rate schools such as Jinling, Soochow University, and Liangjiang Normal. Even if you are sure to win the first prize in the national competition, you will hold a admission quota first and then ride a donkey and find a horse, which is an excellent choice. Therefore, everyone attaches great importance to it and wants to show their strength in the exam.

Although when they were separated, Teacher Huang Tongyuan asked herself to take the first place every time to live up to her for thousands of miles, Jiang Shuiyuan did not force this first place too much. The reason is that in addition to too many experts and not being able to force it, she also wanted to try to give up her utilitarian mind, can she find some fun in learning?

On Friday afternoon, the day before the training class ended, the graduation exam was held as scheduled in a small classroom at Liuchao Middle School.

Compared to the more or less panic of others, Jiang Shuiyuan seemed as calm as water. After getting the test paper, he roughly read it from beginning to end. The questions were not too difficult. Most of them came from those reference books, and only a few questions were out of range. I guess they had to use their brains or work on luck. This doesn't matter. The key is that there are additional questions with 50 points in addition to the normal test paper with a full score of 100 points. The questions are very simple:

"If conditions permit, what direction do you want to do in research? What are the goals? What are the possible ways to achieve it?"

This is interesting! To be honest, his impression of biology is still limited to the reference books he has read before and the content everyone has discussed these days. It has not risen to the realm of long-term suspicion and independent exploration, nor is it eager to put it into practice. If he really wants to put a bunch of instruments and materials in front of him, he feels like a dog biting a turtle - nowhere to sip!

While doing the test paper, Jiang Shuiyuan thought about what research he would do if conditions permit. It was not until at some point that his eyes accidentally swept over the bracelet that was neither gold nor jade, nor wood nor stone on his left wrist that he had a scheming in his mind. After finishing the previous test paper, it took nearly twenty minutes to sort out his thoughts, he picked up his pen and wrote his question on the blank A4 paper:

"Develop a portable DNA damage detector".

He then continued: "DNA damage will gradually accumulate with age, affecting chromosomal replication, transcription and other DNA metabolism events, thereby causing genomic instability and cell dysfunction. Overall, DNA damage has many potentially harmful effects: leading to cell death, cell function loss, permanent cell proliferation arrest (aging) and gene mutations. The latter is mainly related to cancer, and all these damage effects are related to the aging process. Cell studies from human local premature aging and research on mouse models for DNA damage repair defects also support this view. Developing a portable DNA damage detector, which monitors the degree of DNA damage accumulation in real time by comparing it with early DNA structure sequences, is of great significance to intervening in cell aging and preventing cancer development."

The theoretical support is very sufficient and the reasons are high-sounding, but Jiang Shuiyuan knew that to develop such a DNA damage detector, even if it is several times larger or dozens of times larger than his bracelet, he would have to face huge technical problems. Because before that, he wanted to figure out what the bracelet given by Shuibei Niang was, and had specially understood the working principle, level and operation method of the current DNA sequencer.

According to the information found on the Internet and libraries, the current mainstream second-generation DNA sequencer is not only stupid but also slow, but its efficiency is also very slow. Even so, the price is still ranging from tens of thousands to hundreds of thousands of yuan. As for the third-generation DNA sequencer that covers high-throughput sequencing technology, which can automatically fill, inject, and collect and analyze data, the efficiency has been improved. However, the total electrophoresis time of each sample is still more than 2.5 hours, and the weight is 200 to 300 kilograms. What's more considerable is that its price is at least hundreds of millions of yuan! It is definitely not affordable for ordinary people.

The volume and weight of instruments worth millions are reduced by nearly a hundred times, the efficiency is increased by dozens of times, and the price must be reduced to a range that normal people can accept. Just thinking about it is stressful. Moreover, if you want to achieve portability of DNA damage detection, in addition to DNA sequencing, it also involves massive data comparison, which must be processed by the workstation!

Because of the endless problems, Jiang Shuiyuan tried his best to make up the cracks. He only barely circled the circle two or three minutes before the end of the exam. As for whether this circle looks like a melon seed or full of loopholes in the eyes of the teacher, he couldn't control it.

This is a few times since Jiang Shuiyuan got the bracelet. He rarely used the exam time. After submitting the paper, he felt so tired that he was dizzy. He was about to go out for a walk and rest when he heard He Dayi, who had just walked into the classroom, shouting: "Don't hurry to leave first. There is still a situation form to fill in. It's not too late for you to go and play after filling it!"

"What's the table?" someone asked.

A few chuckles came from the corner of the wall: "What else can it be? Of course it is a sign of admission to the student status!"

He Dayi did not answer positively: "You will know if you get it."

Taking advantage of the gap, Shi Yang flashed over and asked, "Jiang Shuiyuan, how did you answer the last additional question? Could it be to study modern and contemporary literature?"

"How is this possible! This is a biology exam, my brain is not as big as you think."

"What is that?"

"What about dna damage. What about you?"

Shi Yang suddenly became furious: "I, of course, do taxonomy research, especially plant taxonomy, which is my dream. If all conditions allow, I want to create a handheld plant recognition device for the public and biological enthusiasts. As we all know, the "Chinese Botanical Journal" edited by the Department of Biology of Jingshi University and the Institute of Botany of the Chinese Academy of Sciences is currently the largest botanical classification work in the world with the richest variety. It records the scientific names, morphological characteristics, ecological environment, geographical distribution and other information of 3o1 families, 34o8 genera, 31,142 plants in my country. In order to compile this book, it took more than 300 scientists across the country for 50 years. Ordinary people want to read it and recognize all the plants around them, which is tantamount to the sky. Not to mention ordinary people, sometimes even plant taxonomicists themselves are scared!"

Jiang Shuiyuan smiled and said, "So they created a family called Dafengzi family (bsp;                                                                                                                                                                                                                                                  �

Shi Yang also laughed: "Not only that, there are many plant classifications in daily life that subvert the three views. For example, the star fruit we often see belongs to the Oxalis family. For example, wintersweet and plum blossom are not the same, and they are very close to each other. One belongs to the subclass of Malan, the camphor family, the genus of Waxalis, and the other belongs to the Rose, the Rose family, the subfamily family, the apricot family. Radish and carrots are the same. It makes people doubt the scientific nature of plant taxonomy!"

Jiang Shuiyuan nodded: "Radish are from the order Crusade, Crusade family, and radish, while carrots are from the order Umbrella, Umbrella, and Carrots. The two have a long relationship and are indeed not a family!"

Shi Yang said: "But the general public doesn't know! My idea is to make full use of today's advanced technologies such as DNA extraction, pattern recognition, chip technology, etc., with the Chinese Plant Chronicle as the basic support, and integrate traditional morphological classification and current cell taxonomy and chemical taxonomy. This allows the public and biological enthusiasts to identify the surrounding plant species anytime and anywhere during walking, business trips, travel, and adventures, thereby increasing the entire society's attention and awareness of animals and plants around them. At the same time, it has strengthened the research team of plant taxonomy in disguise to avoid the fact that many plants have not been classified, studied, and cognized by biologists."

Jiang Shuiyuan couldn't help but praise: "Good idea!" (To be continued.)
Chapter completed!