Chapter 96: Bacteria twisted into an "eight"

The two sat in the gazebo for more than an hour, Qian Qian packed up the garbage and left.
The first floor and four halls of Xiaoming Dog's office floor belonged to Xiao Ming. The room has been renovated. Qian Qiang also arranged furniture and air purifiers. The room can be moved in for another two or three months.
For the past two or three months, Xiao Ming still chose to live in school.
Life becomes regular, get up for a run, go to class in the morning, then go to the library.
After studying the textbook for biology, Xiao Ming attacked Pan Shaxing's biology textbook.
第 一次 For the first time, he literally learned about the fungi that swallowed a colony.
The complex name of Pansacin cannot be translated at all here. Xiao Ming can only use the letters A, B, and C to replace the fungi in the colony.
Here, Xiao Ming discovered the biggest difference between panfloxacin biology and contemporary biology.
The fungi in the phagocytosis 1 colony belong to prokaryotes, but most of them have no cell wall, only high-strength cell membranes filled with folds, and the composition of the cell membrane is a high molecular polymer.
In the human world, prokaryotes without cell walls are not called bacteria, and they are called mycoplasma. Panfloxacin is collectively called bacteria.
"Oh my God!"
Xiao Xiaoming exclaimed in a low voice. Most of the bacteria studied by humans are composed of phospholipids, but the bacteria that swallowed 1 colony are not. This is why these bacteria can tolerate high acid and alkali.
怎么 How does such a strong cell membrane exchange substances?
解释 An explanation is given later in the textbook.
For example, A bacteria, when bacteria need to exchange materials, the highly wrinkled cell membrane will be unfolded and then closed in the middle, so that the bacterial structure becomes similar to the "8", separated from top to bottom. Of course, the actual structure will be more complicated. Weak electrodes will appear on the upper and lower ends of the "8", and the electrodes will attract nearby materials to gather.
The "0" on the "8" has a cytoplasm full of enzyme systems, and the "0" on the lower has the genetic material DNA, which is concentrated in the low electron density region. The reason for this separation is to prevent foreign substances from invading the DNA.
After the bacterial structure is deformed, it begins to "eat".
The enzyme system in the cytoplasm secretes special enzymes. The enzymes will dissolve the cell membrane and let the "0" on it open a mouth. This way, the external material, that is, the "food" of the bacteria, enters the cell from the mouth. The opened cell membrane is immediately closed.
After the substance enters (take the aromatic hydrocarbon compound as an example), the enzyme system will secrete the decomposing enzyme of the aromatic hydrocarbon compound, which will decompose the aromatic hydrocarbon compound into methane, halogen salt and so on after opening the ring. It also decomposes into salt as well as carbon dioxide and water after contact. After the metabolism is completed, the bacteria will change from "8" to "0".
一些 In metabolic engineering, some substances and energy will be used by the bacteria themselves in the metabolic process.
Of course, the complex metabolic degradation process can not be completed by only one kind of bacteria. The final product of one kind of bacterial metabolism is the starting point of metabolism of the next kind of bacteria.
In addition, there is another kind of bacteria that breaks down the metabolic enzymes outside the bacteria, degrades the target in the external environment, and then absorbs the explained products into the body.
Then there are different enzymes for different substances to degrade. These enzymes are the expression of bacterial DNA and part of gene expression.
There will be one of the most difficult places in the collaborative work of bacteria. The metabolite of one kind of bacteria will be an inhibitor of another kind of bacteria, and the metabolite will become an operon to stop the expression of another gene and even let it death. This is a difficult problem.
几十 There are dozens of kinds of bacteria working together in sewage treatment, so there will be more bacteria working together in urban sewage.
The textbook describes the experimental steps for obtaining bacteria in urban sewage treatment.
First of all, the bacteria are sampled and screened. The bacterial samples here include not only bacteria that have swallowed 1 colony, but also bacteria in urban sewage.
This time, we learned in detail the gene expression of each bacterium, that is, what kind of pollutants their enzyme systems can degrade.
Then, through various means, including gene transplantation, altering gene expression, etc., these bacteria can promote each other rather than hinder each other, and finally form perfect sewage treatment colonies.
Is quite complicated, and the amount of engineering is quite large.
It will also be applied to gene splicing and splicing technology, as well as the gene expression regulation technology being done by the biological laboratory of Jiangcheng University, but here is the gene expression regulation of prokaryotes.
"I need a helper," Xiao Ming said, "so many experiments can only be completed by himself without knowing the year of the monkey."
Xiao Xiaoming thought of the molecular biology laboratory and Gao Siqi again.
"咦? Are you in the library? Why are you so interested in living things?"
When Xiao Ming was lost in thought, Gao Siqi happened to pass by and she was holding a few books.
"you are?"
Because Gao Siqi kept wearing a mask that night, and in the laboratory environment, Xiao Ming didn't know what Gao Siqi looked like at all.
Until Xiao Ming saw Gao Siqi's eyes, he remembered and said, "Gao Siqi?"
Gao Siqi sat down to Xiao Ming and said, "Shouldn't you call me a sister?"
Gao Siqi's long hair with a shawl ~ EbookFREE.me ~ The eyes were as bright as that night.
According to modern aesthetic standards, Gao Siqi is not a beautiful girl with a face of melon seeds, but she has a postgraduate degree in dealing with biology for a long time. She has a temperament that many beautiful net red girls do not have, which is unique to intellectuals.
During the day, there are many people in the library.
Gao Siqi ’s impression in Xiao Ming ’s heart also changed from a pulsating universe, a beating hydrogen atom in the dark, and a curled-up DNA into a living person.
"Forget me so soon?" Gao Siqi smiled, making her smile more real.
"No," Xiao Ming said, "I just didn't expect you to come to the library."
"To be a staged dissertation, I just checked some information, postgraduate research monk!" Gao Siqi sighed.
Indeed, in terms of experimental intensity and academic speciality, Jiangcheng University is much better than ordinary universities. Postgraduates here will become cutting-edge talents in various industries, while graduates from other schools may have worse hands-on skills than undergraduates.
"The effect of the operon on the expression of the enzyme system?" Gao Siqi read the note written by Xiao Ming on A4 paper, and said, "If you are interested in living things, I can say something to my mentor and adjust it for you."
correct!
Xiao Xiaoming suddenly thought that Gao Siqi and her classmates were both elites in biology. With their help, couldn't the experiments be implemented quickly?
Xiao Xiaoming jumped in his heart and said, "That, Xuejie, are you free at night? I invite you to dinner and discuss some professional issues with you."
"Yes!" Gao Siqi said politely: "A miso rabbit outside the school is good."