A few knowledge points of high school biology!

1.Yes. The cell wall of bacteria is called peptidoglycan, and the main component of the fungal cell wall is chitin.

2Not necessarily. Algae is a general term for a variety of organisms that are capable of photosynthesis, but not all algae are plants. For example, kelp, which is shaped like a terrestrial plant, is a green, red, or brown algae. These and other algae also include different single-celled organisms.

3.There are sexual and asexual modes of reproduction. Asexual reproduction refers to the reproductive mode in which a new individual is directly produced by the mother without the union of germ cellsIncluding budding reproduction. Spore reproduction, etc. Give a**.

Yes, it's different from plant cells, and I forgot about it, hehe.

Be. For example, asexuality, sexuality ==

1.Yes High school biology textbooks teach that the cell walls of bacteria do not contain cellulose, and the main components are compounds made from the combination of sugars and proteins. (Can also be called peptidoglycan).

2.Not necessarily, in high school biology, except for cyanobacteria, which are prokaryotes, the others are plants.

3.There are two major types of reproduction: sexual and asexual.

1 Yes, the prokaryotes are peptidoglycan and the fungus is chitin.

2 do not belong, some are microorganisms.

3 Sexual, non-sexual.

1. The structural levels of living systems are as follows: cells, tissues, organ systems, individuals, populations, communities, and ecosystems.

2. Reducing sugars (glucose, fructose, maltose) can react with Feilin reagent to form brick-red precipitate; The fat can be stained orange by Sudan III (or red by Sudan IV); Starch (polysaccharide) turns blue when exposed to iodine; The protein reacts purplely with the biuret reagent.

3. The basic unit of protein is amino acids, and the general formula of amino acid structure is NH2-C-COOH, and the difference between various amino acids lies in the difference of R groups.

4. Each amino acid molecule contains at least one amino group (—NH2) and one carboxyl group (—COOH), and both have an amino group and a carboxyl group attached to the same carbon atom, and this carbon atom is also linked to a hydrogen atom and a side-chain gene.

5. The carrier of genetic information is nucleic acid, which plays an extremely important role in the genetic variation and protein synthesis of organisms, and nucleic acid includes two categories: one is deoxyribonucleic acid, referred to as DNA; One is ribonucleic acid, referred to as RNA, the basic unit of nucleic acid, nucleotides.

6. Maintain a relatively stable intracellular environment, biofilm system functions, and many important chemical reaction sites separate various organelles to improve the efficiency of life activities.

7. Active transportation of substances across membranes: energy is required; Carrier protein assistance; Low concentration High concentration, such as inorganic salts, ions, endocytosis, exocytosis: such as carrier proteins and other macromolecules.