Although I graduated a long time ago, when I was in school, I really had a lot of funny stories that made me laugh out loud and cry. pigs. As a newcomer to Zhihu, I just wrote some. available to everyone.
Without further ado:
1. One afternoon at high school, the school held a whole class assembly. I don't remember the details anymore. Our class sat on the edge. and in the back, to be honest, no one was listening to what was being said on stage. In high school, the homework load was relatively heavy. This kind of conference was valuable rest time. Some teachers even brought books in English. memorize vocabulary secretly. Everyone was sitting on stage at that time. The teacher of our class is a middle-aged uncle who looks a lot like the big sweet potato from the cartoon "Old Master". Maybe he fell asleep in his seat because he was too tiredford. At one point during the conference, they were about to go on stage to give out awards or something. The room was a little noisy. A few people in our class who were not afraid of death took advantage of the chaos and secretly took out their cell phones. phones to secretly take photos of the professor's sleeping face. The person sitting next to the teacher secretly took the photo. We collectively held our breath, but then the big thing happened, he left the flash on! Hahahahahahahahahaha, the spectators were scared to death, but the twist happened, the class teacher didn't wake up hahahahahahahahaha, this photo went viral in the class hahahahahahahaha.
2. I was also in high school. The school waltz was very popular at that time, I had to take the time to learn it every summer afternoon, the sun was very poisonous and I coulds. I didn't open my eyes. The place where I was standing began to be directly hit by the sun, and I couldn't hide, so I could only close my eyes. As a result, there was a movement where I opened my arms on both sides of my body and slowly brought my right hand up. The moment I opened my eyes, I really wanted to die instantly! I spanked my PE teacher, who was a man. The classmates around me almost died of laughter. The teacher looked at me with a serious expression and left.
3. » asked A chemical formula: adding a certain acid to a certain compound will produce barium hydroxide octahydrate and what? There was a boy sitting in front of me who liked to eat gum and read comic books. The teacher saw that he was not paying attention to the lesson and deliberately woke him up. Naturally, he didn't know anything because he didn't paynot have. pay attention to the conference. The people around him were really mean when I think about it now. They could obviously tell him the right answer, but insist on talking about barium hydroxide octahydrate and bubble gum. He might be a little nervous and confused, so he blurts out, “Barium hydroxide octahydrate and bubble gum!” The class burst into laughter and as a result he was punished for copying the chemical formula 50 times.
The process of converting glucose into ATP is covered in Chapter 3 of University Biochemistry, so it is impossible to explain it clearly on Zhihu. If you have the conditions, you can buy. any version of biochemistry textbook for in-depth understanding. I personally recommend Wang Jingyan's "Biochemistry Tutorial". Note that this is a book, not the two big "Biochemistry" books that can kill people. Let me give you a brief explanationcation of the question: in high school biology, it will be written: Glucose produces pyruvate and ATP by glycolysis in the cytoplasm. Pyruvate enters the mitochondria and is then broken down to generate a large amount of ATP. can memorize it. In fact, it's a very, very complex process of change. For example, glycolysis is composed of 10 reaction steps, followed by a tricarboxylic acid cycle in the mitochondria, which further breaks down pyruvate to produce carbon dioxide and reducing hydrogen (NADH). Finally, NADH enters the respiratory chain to produce water and ATP. There are multiple hypotheses about the specific mechanism of ATP generation, but in general, the way of generating ATP by hydrogen and respiratory chain reduction can be called oxidative phosphorylation. In addition, during the breakdown of glucose, phosphorylation occurs at the substrate level, whichdirectly converts ADP to ATP. As for the specific content of these metabolic pathways, limiting enzymes, energy production, intersection with other metabolic pathways, etc., these are the basic knowledge required by undergraduate biological dogs. It's basically a waste of time for high school students. understand them. Even if you want to jump into the bottomless pit of biology, knowing these things in advance is not as effective as memorizing more and getting into a better school. The process of converting glucose into ATP is covered in three chapters of academic biochemistry, so it is impossible to explain it clearly on Zhihu. If you meet the requirements, you can purchase any version of the biochemistry textbook to learn more. I personally recommend Wang Jingyan's "Biochemistry Tutorial". Note that this is a book, not the two big books of "Biochemistry" which cancan kill people. Let's briefly talk about the issue: in high school biology it will be written: Glucose produces pyruvate and ATP by glycolysis in the cytoplasm. Pyruvate enters the mitochondria and is then broken down to generate a large amount of ATP. In fact, it is a very complex process of change. For example, glycolysis is composed of 10 reaction steps, followed by a tricarboxylic acid cycle in the mitochondria, which further breaks down pyruvate to produce carbon dioxide and reducing hydrogen (NADH). Finally, NADH enters the respiratory chain to produce water and ATP. There are multiple hypotheses about the specific mechanism of ATP generation, but in general, the way of generating ATP by hydrogen and respiratory chain reduction can be called oxidative phosphorylation. In addition, during the breakdown of glucose, phosphorylation occurs at the substrat, which directly converts ADP to ATP. As for the specific content of these metabolic pathways, limiting enzymes, energy production, intersection with other metabolic pathways, etc., these are the basic knowledge required by undergraduate biological dogs. It's basically a waste of time for high school students. understand them. Even if you want to jump into the bottomless pit of biology, knowing these things in advance is not as effective as memorizing more and getting into a better school. This method of directly using chemical reactions to convert ADP into ATP does not require the participation of oxygen, but the efficiency is extremely low. The energy source of oxygen respiration was gradually eliminated during the process of biological evolution. Additionally, a substrate phosphorylation step will also occur in the tricarboxylic acid cycle, and the principlee is the same as above. In fact, the primary energy source for ATP production in aerobic respiration is oxidative phosphorylation. That is, the NADH and FADH2 produced by the glycolysis reaction and the tricarboxylic acid reaction pass through the proton pump on the membrane of the inner mitochondrial membrane, remove protons and are reduced, they have therefore a positive charge, causing a potential difference on the two. sides of the membrane, which converts electrical potential energy into chemical energy, thus producing ATP.