Ask for help with the Error Book on Biology and Chemistry in the third year of high school

The ancients said: Eat a trench, grow a wisdom. It makes a lot of sense. This is to be made clear in the first place.

The key to the wrong question is to summarize, what to summarize, summarize the wrong question, when the summary is completed, each type of question (the conditions are similar, the questions are different, the conditions are similar, or the devices in the question are similar or the same questions are different, and it is necessary to do more than two times. Do it every time. This can be used in physics, and the effect is better, because chemical biology requires a higher memory.

I suggest that you must read more textbooks while sorting out the wrong questions, and every time you sort out, you must correspond to the knowledge points in the textbooks, and physics is also, the effect is very good, and I used this method when I reviewed, which improved by more than 150 points.

Remember: teachers are experienced, listen to teachers.

I also hope that you will have a successful title in your studies.

In the third year of high school, I bought a five-year college entrance examination three-year simulation. The questions there are very good, and they are divided into units, and the questions that are done there are sorted out in the book, indicating which region of the college entrance examination questions or mock questions that year, and it is easy to find the answers when you do it later. It's all done, and it's no problem.

The bookstore sells the wrong question books of the top students in the college entrance examination, you can take a look.

The meaning of the wrong question book is to reflect on the summary and make no mistakes.

You write down the wrong question in the wrong question book, and then write down the reason for the mistake so that you don't make the same mistake next time, as if that's all there is to it, thank you. I wish you progress in your studies and live a happy life!! ~

1. All change the field of view, that is, adjust the microscope, and the two knobs are the two knobs that can change the position of the mounting.

The dissociation solution can be configured as needed. Dissociation can be done for a short time at a higher temperature or for a longer time at a lower temperature. The book says that the temperature is higher in five minutes of dissociation, and generally dissociation is not dissociated at zero degrees Celsius.

1. Find the meristem above the root crown under low magnification, and then convert it to high magnification for observation.

2.The temperature is low, room temperature is fine.

1 Isn't moving the slide transferring?

2 You still have to think about the temperature, 0 Do you do the experiment under that condition?

1.It's just to look at the rest of the film and adjust the position of the film.

2.The temperature gets lower, so it's going to take a little longer.

Low magnification first, then high magnification. Twenty degrees Celsius.

I choose ぀The cells of anaerobic organisms can only undergo anaerobic respiration, such as lactic acid bacteria BThe DNA of the prokaryotic cell is independent and does not bind to proteins, so there is no chromosome C

Synthases and hormones require corresponding organelles, such as ribosomes, and some cells (such as mammalian mature red blood cells) cannot synthesize enzymes and hormones without these organelles.

d.Cells have membrane structures with phospholipids and proteins as the main components, and that's right.

The concentration of chloride ion in B is, the concentration of chloride ion in C is 2*2=4mol L, and the concentration of chloride ion in D is 5mol L, so D is the maximum.

2.Ferric chloride contains 3 chloride ions with a concentration of 3mol l, and potassium chloride contains 1 chloride ion with a concentration of 1mol l, so the concentration ratio is 3:1

The amount of sodium hydroxide substance is, dissolved in 10ml of water, diluted to 1L, the amount concentration of sodium hydroxide substance is, take out 10ml of solution, the concentration is still.

The amount of chloride ion in the sodium chloride solution is:

The amount of chloride ion substances in calcium chloride solution is:

The amount of chloride ions in the mixed substance is, and the concentration of chloride ions in the mixture is that not all organisms have RNA and DNA, bacteria have it, no one has viruses, and plants are also prokaryotes and eukaryotes.

1. The question of the amount and concentration of the substance has already told you, you only need to multiply the number of Cl ions.

A: C: 2*2 D: 5*1 Therefore, D2, the chloride ion concentration in ferric chloride is 1*3

The concentration of chloride ions in potassium chloride is 1*1, so the amount of substances in the proportion of gnaoh is 4 40= diluted to 1L, and the concentration is unchanged after taking out 10ml.

The amount of chloride ions in ml1mol l sodium chloride solution is The amount of chloride ions in calcium chloride solution is 70ml of chloride ions in the mixed solution, so the concentration of the substance is.

Biology: Not all organisms have DNA and RNA, some viruses only have DNA, but some viruses have neither DNA nor RNA.

1, b a c d are both neutral solutions, c of hydrogen ions is ten to the negative seventh power, and b ionization of chloride ions to produce hydrogen ions.

2, 15 to 2

3, per liter. 4, 1mol per liter.

5. Not all viruses contain a single DNA or RNA (except for viruses and proteins); Bacteria contain only DNA

Of course, humans have both, plants have both, prokaryotes have both, eukaryotes have both.

The preparation of monoclonal antibodies and the production of insulin in the first figure is genetic engineering, and cell engineering mainly refers to the culture of cells and tissues, so d is correct.

In the second diagram, only animal cells and lower plant cells have centrosomes, mung beans are not lower plants, so there is no centrosome, and c is wrong. Option b mung beans do not photosynthesize during the process of sprouts, so the total amount of organic matter decreases, correct.

The first figure shows that the production of monoclonal antibodies does not belong to cell engineering, and generally the process is mass production, which is not only the preparation of monoclonal antibodies, but also the preparation of monoclonal antibodies. The production of human insulin from yeast is genetically engineered. Banana detoxification seedlings are the use of plant cell tissue culture shoot tips for detoxification.

The second figure shows that orange peel essential oil is pressed and distilled is used for rose essential oil. There are words in the textbook explaining why you can't use the distillation method, so read the textbook carefully.

The third picture is the fifth question, right? Option b is because the light reaction is enhanced, which promotes the dark reaction, and C3 will accelerate the utilization, so C3 decreases and C5 increases.

The basics are to read the textbook. If you don't understand, you can ask.

The number of electrons contained is 14*

2. The statement that 1mol NaCl contains a NaCl molecule is inaccurate, and if it is an aqueous solution or in a molten state, there is no molecular form.

3. The solid is 1molNaCl, and when it is solid, it exists in molecular crystals.4 Are embryonic stem cells totipotent? If so, can you develop into a complete individual?

Embryonic stem cells are totipotent and can develop into a complete individual.5 Proto-oncogenes are not expressed in the human body, so are tumor suppressor genes expressed in the human body?

According to the explanation of cell biology of the university, the expression of proto-oncogenes in normal human cells is generally low, and only when cells become cancerous, the expression of most proto-oncogenes decreases during aging, and the expression of tumor suppressor genes is enhanced, but it also varies according to the type of cells.

In fact, the definition of tumor suppressor genes and proto-oncogenes in the human body is relatively narrow in high school, and if tumor suppressor genes are overexpressed, they will also become proto-oncogenes.

4 Embryonic stem cells have a totipotent type that can develop.

5 Failure to express oncogenes is a manifestation of tumor suppressor genes.

(1) In addition to biological communities and inorganic environments, a complete ecosystem must also have energy.

3) Bacteria are not all decomposers, but also producers and consumers.

2 (1) The flow of energy in ecosystems includes the processes of energy input, transfer, transformation and dissipation.