理综-生物（Biological science）.doc

理综-生物（Biological science） 1. gene recombination occurs only during meiosis and genetic engineering. (triploid, viruses, bacteria, etc., not genetically recombinant) the genetic material of 2. cell organisms is DNA, DNA has RNA, and there are 5 bases, 8 nucleotides. ? 3. biuret reagents cannot detect protease activity, because protease itself is protein. 4. hyperglycemia and diabetes?. Glucose, without hyperglycemia in urine only with blood test, Benedict cannot test. Because the blood is red. 5., onion epidermal cells do not undergo mitosis, and cells must be continuously divided before cell cycle occurs. The 6. cell clone is cell culture, using the principle of cell proliferation. The 7. cell plate and the equatorial plate?. The cell plate is a plant cell division, later formed by the Golgi body, the equatorial plate is not cell structure. 8. hormone regulation is a major part of fluid regulation. CO2 stimulates the respiratory center and makes respiration faster. It belongs to the regulation of the body fluid. 9. injection serum treatment does not belong to the two immunity (antigen + memory cell), and the antibody in serum is a mixture of antibodies. 10., the stimulus muscle will contract, does not belong to the reflex, the reflex must go through a complete reflex arc, to determine the direction of excitation, conduction, there are synapses or ganglia. 11. neurotransmitters are excitatory transmitters and inhibitory transmitters, which can cause changes in the potential of the next neuron, but the electrical properties are constant, so they do not cause effector responses. 12.DNA is the primary genetic material, primary, how to understand? Each species has only one genetic material, the cell being DNA, and RNA is not a secondary genetic substance, but for the whole biological community. Only a small number of RNA viruses have genetic material called RNA. What are the 13. recessive genes in which traits can be expressed? Haploid, homozygous (such as BB or XbY), lo