High School Biology, Analyze this question and explain what is the relative number of cells?

In my opinion, A and D are wrong, of course, this is very unscientific, the teacher's level is really not complimentary, C value is used so casually, it does not help students understand the connotation of biology at all.

Some genes can be expressed at the same time, and there is no difference in time and space, such as housekeeping genes. There are also genes that are expressed differently in different cells and are affected by time and space, such as luxury genes.

a. The composition is different from the chemical elements of this dead cell.

The kind is more or less the same, a correct;

b. In different cells, the content of various elements is not the same, b is wrong;

c. The chemical elements that make up the cell can be found in inorganic nature, which reflects the unity of the biological and non-biological worlds, and C is correct;

d. Carbon chains are biomacromolecules.

The basic skeleton, so the most basic element that makes up the cell is carbon, d is correct Therefore, b

Proteins and lipids are both mixtures of compounds, so they cannot be counted as compounds (note that compounds and mixtures are two completely different concepts, why didn't the two downstairs notice?). ）

Because the constituent elements of sugars are only c, h, and o, they cannot be said to be the main constituent elements, and I have also been cheated on this question.

The salting out of proteins is only a phenomenon of reduced solubility in light metal solutions, and the spatial structure does not change.

4.Fat is also a big concept and is made up of a variety of different molecules (fat is made up of three elements: C, H, and O. Fats are triacylglycerides composed of glycerol and fatty acids, in which the molecule of glycerol is relatively simple, while the type and length of fatty acids are different.

There are three main categories of fatty acids: saturated fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids), and to be precise, mixtures.

5.In the case of ribose, the function of ribose is not to store energy, but to serve as a component of genetic information. In addition, sugars can also form glycoproteins with proteins, which control the entry and exit of cellular substances.

6.The most abundant inorganic matter in living cells is water, and organic matter is protein. The compounds that make up the cell include inorganic compounds and organic compounds. Inorganic compounds include water and inorganic salts, and organic compounds include sugars, lipids, proteins, and nucleic acids.

1. There is no nucleus or organelle in mammalian mature red blood cells, so there is no nucleic acid 2. If you want to chew the word, the word "main" is wrong, it should be "only".

3. The structure of salting out protein has not changed, but it is precipitated due to the reduction of solubility, and its biological activity is not changed.

4. Fat is not a polymer, it is just an ester formed by a high-grade fatty acid and glycerol, and there are only two molecules in the process of each molecule being produced, which is essentially no different from ethyl acetate, but the molecular weight is slightly larger. But proteins, polysaccharides, and nucleic acids all have corresponding basic units: amino acids, monosaccharides, and nucleotides.

You can understand it as a polymer produced by a polycondensation reaction, and the molecular weight is much larger than that of fat.

5. Sugar on glycoprotein has the role of recognition.

6. **The above sentence is "live", the most inorganic matter in the living cell is water, and the most organic matter depends on the situation, which is generally considered to be protein.

.,, There are mainly those kinds, and there are many, such as nucleotides, amino acids, and other carbohydrate components are carbon, hydroxide, and ,,, mainly, wrong.

No, salting out, the protein is not denatured,,, high temperature denatures the protein fat is not a multimer, fat is a type of oil, yes, the higher fatty acid glycerides, not bound by monomers.

The functions are different, for example, glucose is used to breathe and release energy, ribose and deoxyribose, used to form nucleic acids, and so on, there are many examples,,, also, sugar is the main energy substance, not energy storage substance, fat is a good energy storage substance in the animal body.

Yes, and the most common compound in the fresh weight state of the cell is water, and in the dry weight state it is protein.

1. Those six categories are the main compounds - "main";

2. Not mainly, but generally, high school can be considered only;

3. Salting-out is precipitated from the dissolved state, the activity is still there, and the activity cannot be recovered after high temperature deformation;

4. Because fat has no monomer;

5. Sugars are mainly used as energy supply substances, and proteins can also be modified for molecular recognition and interaction, such as the sugar chains of some membrane proteins and the sugars on the surface of the membrane;

6. It should be right.

Many of the expressions in high school textbooks are not very rigorous, first of all, the meaning must be understood, and if you answer the questions, refer to the textbook expressions.

These books are all there, find them yourself.

Consumers (2) Species (3) Ecosystems (4) Trees and weeds 7(1) C, H, K, CA, c(2) are the same, different 8Cell membranes, ribosomes, mitochondria, DNA

Student: There is time to play questions, and read more books after the test.

No one will show you if the kid fights so badly.

Choose A, because it is a forest in the growing season, and it produces more energy (ATP) than it consumes.

b In the absence of anaerobic, the cell matrix produces more ATP than mitochondria.

c Prokaryotic decomposers do not have mitochondria in their bodies.

d options are not complete, the royal surplus can't be, maybe less, or equal, but they don't sell the first in line with the growing period of the ecosystem.

a 3 to 6 are polyploid species, and trousers are diploid to tetraploid, so they are not a species. The B-process VI is genetically engineered and requires restriction enzymes and ligases C4 to 5 haploid doubling by colchicine induction