Two days later, the grade 20 freshmen welcomed the first final exam of their university career.
Unlike high school, university final exams were generally not too difficult. They were all basic questions that were free marks. It all depended on the student's grasp of the knowledge.
In addition to the professional compulsory courses, the students of the Institute of Biological Sciences also had to take basic compulsory courses such as Bioethics, Linear Algebra, Inorganic and Analytical Chemistry, Natural Science, Organic Chemistry, Advanced Mathematics, University Physics, Introduction to Biology, and so on.
After a few non-stop exams, the students were dizzy and had no idea what year it was.
However, this was not a big deal for Chen Chen. Others still needed to carry a cheat sheet for their exams, but Chen Chen had already gone through dozens of textbooks. Even if he directly took the postgraduate entrance exam, it would be a piece of cake, let alone the final exam.
After several consecutive exams, Chen Chen maintained a record of being the first to hand in his papers. He had also thoroughly established his reputation as a top student in Class 2.
After all, many people only handed in their papers after seeing Chen Chen fill them up. Also, when the invigilators picked up Chen Chen's papers out of boredom and checked them, they were all surprised. They did not look like they were about to faint from anger. Clearly, the error rate was not high.
Therefore, after another exam, Li Bo and Zhou Jie forcibly dragged Chen Chen back to the dormitory and carried out a secret deal that could not be revealed.
At the request of Li Bo and Zhou Jie, Chen Chen had to make a copy of the multiple-choice answers for each question for the two of them. The price was that the two of them would have to fetch water for Chen Chen for an entire semester starting from the next semester.
After signing this humiliating and unfair contract, the two of them had a complicated expression every time they looked at Chen Chen. However, when they arrived at the examination room, that complicated expression turned into a fervent and devout expression as if they were facing their savior.
Amid this pain and eagerness, Li Bo and Zhou Jie secretly swore that they would study hard from the next semester onward and strive to turn their lives around before their sophomore year.
After a few days of messy exams, the freshmen of Shangdu Jiao Tong University finally ushered in the first holiday of their university career. Countless students who had left their homes cheered as they embarked on their journey home.
As the campus gradually became deserted, after Chen Chen and Wang Wei sent Li Bo and Zhou Jie off, they arranged a place to meet up with Xia Yin to prepare for the experiment.
In a spacious classroom, Wang Wei was looking at a thick stack of experimental data while Chen Chen was flipping open a textbook on cell biology.
Although Chen Chen's expression was very casual, every time he turned a page, all the knowledge on that page would be permanently imprinted in Chen Chen's mind, never to be forgotten again.
Not long after, light footsteps came from the corridor, and then a girl with shoulder-length hair appeared at the door.
The girl had a pair of bright and clear eyes. When she saw the two people in the classroom, she smiled lightly, and the unique youthful aura of a young girl overflowed.
"You are …"
When Wang Wei saw the girl entering the classroom, he quickly stood up and said in amazement, "Miss, you must be Xia Yin, right?"
"Hello, I am."
Although he was not wearing the black-rimmed glasses and had changed into a pair of contact lenses and even put on makeup, these details did not seem to exist in Chen Chen's mind.
Based on Chen Chen's imagination, even if he restored the woman in front of him to her naked state, it would still be so …
eary。
"Why are you dressed like this?" Chen Chen pretended to be surprised.
"After all, it's the holidays. It's not too much to squeeze out some time to tidy up, right?" Xia Yin pretended to be annoyed. "Don't you look good?"
"You're quite pretty, I thought you'd be one of those rich... Cough cough cough cough!"
Wang Wei was just about to speak when he realized something and started coughing violently.
After introducing the two to each other, Chen Chen steered the topic to the main topic. "This time, I've temporarily planned three experiments, all related to autologous stem cells."
As he spoke, Chen Chen took out a thick book of printed information from his bag and handed it to Xia Yin. "Stem cells, a type of cell in the human body that has unlimited self-renewal ability and can differentiate into at least one type of progeny cell.
"For example, hematopoietic stem cells can differentiate into red blood cells, white blood cells, platelets, and so on; skeletal mesenchymal stem cells can differentiate into bone cells, chondrocytes, muscle cells, fat cells, and so on.
"The stem cells in the human body work every day. Hair grows continuously, nails grow, new cells replace aging cells every day, and the source of these new cells is the various stem cells in the human body.
"My first experiment is an experiment on the treatment of brain damage by neural stem cells."
Chen Chen explained, "As the name suggests, neural stem cells are adult stem cells that can repair nerves. The principle of the surgery is this: After implantation into the human body, it will stimulate the body's own stem cells to automatically secrete cell growth factors – a type of small-molecule protein with a wide range of biological activities, thereby repairing the brain nerves.
"There are also 'autologous' and 'allogeneic' stem cells. As the name suggests, 'autologous' refers to stem cells that originate from one's own body. By extracting one's own stem cells and growing them in the external environment, then injecting them into one's own body, there are no problems with this type of stem cells that originate from one's own body. It avoids transplant rejection, so it's the best choice.
"For this experiment, we need to create a brain damage model, so it's better to use SD rats rather than Kunming mice. After all, larger animals are easier to work with."
At this point, Chen Chen's expression gradually became solemn. "... As for the autologous neural stem cells required for the experiment, I'll use two methods to obtain them: one, artificial cultivation; two, extraction from the clone body through cloning."
"Cloning?"
Wang Wei was shocked and raised his head. "You want to conduct two batches of experiments to compare which type of neural stem cells is more effective?"
"Bingo, that's it."
Chen Chen snapped his fingers. "Although the outside world has always touted stem cells as something miraculous, claiming that they can proliferate infinitely and never age, in reality, if human stem cells can proliferate infinitely, why do humans still age and die? So, I want to see, since they're both autologous stem cells, is there a difference in the effects between artificial cultivated stem cells and cloned new stem cells? "
"Then why not use the inducement method?"
Xia Yin sat in front of Chen Chen and rested her chin on one hand. "The experiment is ultimately for humans. Since you want to compare the differences between stem cells, isn't it more practical to use stem cells formed by directed differentiation technology?"
"The preparation technology of directed induction stem cells is too complicated and costly."
Chen Chen explained, "Moreover, this technology is still immature. The induced stem cells run the risk of tumorigenesis and immune rejection."
"We can also try cloning other animals, like rabbits," Wang Wei suggested.
"Of course, we can try cloning rabbits, but don't forget about the issues of funding and time. The gestation cycle of SD rats is 20 days while rabbits are twice as long. This will limit our experimental materials in terms of time."
"Alright, I didn't think it through." Wang Wei wore an apologetic expression.
Then, Chen Chen continued. "For the second experiment, I'll destroy the spinal nerves of several rats, leaving them with high paraplegia without endangering their lives. Then, similarly, I'll cultivate stem cells to see if we can use this method to restore the rats' mobility.
"After that, it's the last experiment, which I think is the most important one..."
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