What are the main types of questions in Biology Elective 3?

Biology Elective III is usually an advanced course in high school biology, covering in-depth content in many fields of biology, and has high requirements for students' comprehensive knowledge and ability to solve practical problems. The main forms of the exam are as follows:1

Comprehensive test: including multiple-choice questions, fill-in-the-blank questions, short-answer questions and essay questions, etc., to test students' basic knowledge and ability to apply comprehensively. 2.

Application-oriented examination: It mainly examines students' ability to solve practical problems, and the exam questions have a certain realistic background and application, and candidates need to use the knowledge they have learned to analyze and solve. 3.

Experimental report: Students are required to conduct some biological experiments and research, and write relevant experimental reports, to examine students' experimental design and operation ability, as well as scientific research and jujube writing ability. 4.

Reading report outside the textbook: Students are required to read relevant biology materials in foreign languages, extracurricular books or books, and write relevant reports to examine students' learning and scientific research ability, as well as their writing ability. The above test formats may vary from school to school, and the specific requirements are subject to the school's education and teaching plan and teacher requirements.

Hello, Topic 3 of Biology Elective 1 will indeed be examined in the college entrance examination. Topic 3 mainly deals with the concept of biological evolution, including the origin of evolution, the process of evolution, the mechanism of evolution and the results of evolution.

Origins of Evolution: The origins of evolution derive from Darwin's theory of "natural selection", that is, competition between species, in which species change according to changes in their environment, thus making themselves more adaptable to their environment and thus gaining an advantage.

The process of evolution: The process of evolution is a long process, which involves multiple processes such as genetic variation, reproduction, selection, and elimination of species. The genetic variation of species is the basis of evolution, reproduction is the process of evolution, and selection and elimination are the driving force of evolution.

Mechanisms of evolution: The mechanisms of evolution mainly include natural selection, random gene loss, and genetic recombination. Natural selection refers to the fact that in the event of environmental changes, species with genes that are more adaptable to the environment are preferentially selected, so that they gain an advantage in evolution.

Random gene loss refers to the loss of some genes due to genetic mutations or other reasons during the reproduction of a species, resulting in the evolution of the species. Genetic recombination refers to the reproduction of a species, due to genetic mutations or other reasons, the genes of two species will cross and recombine, resulting in the evolution of the species.

The result of evolution: The result of evolution is a change in the species, which changes according to the changes in its environment, thus making itself more adaptable to the environment and thus gaining an advantage. The results of evolution can also be reflected in the rows of species.

Content from user: Zhao Ni.

1. Multiple choice questions (fill in the correct answer on the machine-readable card, each question has only one correct answer, 40 points for a total of 60 points).

Nucleotide sequence of gene A function of gene B.

The transcript product of the C gene, M RNA D, is all of the above.

2 In the construction of gene expression vectors, the following statements are incorrect.

An expression vector consists of a gene of interest, a promoter, and a terminator.

A promoter is required to drive genes to transcribe mRNA

The role of the terminator is to make the transcription stop where it is needed.

The construction of all gene expression vectors is identical.

a．②③b．①④c．①②d．③④

3 Human glycoproteins must be further processed and synthesized by the endoplasmic reticulum and the Golgi apparatus. Through transgenic technology, the recipient cells that can enable the expression of human glycoprotein genes are:

A Escherichia coli B yeast C T4 bacteriophage D Pneumococcus.

4 Interferon is an important drug for cancer, it must be extracted from the blood, and it can only be extracted from each liter of human blood, so it is expensive. A biologics company in California, USA, uses the following method to produce interferon. As shown in Fig

From the above methods, it can be seen that the company's method of producing interferon is used.

A Hybridization between Individuals, B Genetically Engineered, C Cell Fusion, D Organ Transplantation.

5 Scientists introduced the -interferon gene into E. coli by site-directed mutation, so that the cysteine at the 17th position of interferon was changed into serine, which greatly improved the disease resistance activity of -interferon and improved the storage stability. The biotechnology is a AA39

DNA molecular hybridization technology is equivalent to DNA probe technology.

DNA molecular hybridization techniques:1. Probes are designed for specific DNA sequences, such as those of pathogenic microorganisms, to be unwound before molecular hybridization 3

After that, according to the principle of base complementary pairing, the probe single strand and the single strand to be tested are combined with hydrogen bonding 4 probes (probe DNA single strands) with radiolabeled element 5 on them to detect radioactivity.

After hybridization, it is "eluted" (processed), and only this specific hybridization is retained, and then the hybridization can be seen by the markings on the detection probe. Only DNA that specifically binds to a single strand of a probe can detect radioactivity.

When constructing a gene expression vector, there should be both the target gene and the marker gene, so that it is like marking the cell containing the target gene, but there will also be a situation where the target gene is not successfully introduced, so we use the method of DNA molecular hybridization to accurately detect whether it is successfully introduced, and the DNA molecular hybridization technology is simply to take a small piece of single-stranded DNA that can be matched with the base complementation of the target gene to be detected, label it, and then process the DNA to be detected into a single strand. If the hybrid zone can be produced if it can be complementary, it means that the introduction is successful, and if it cannot be complementary, the hybrid zone cannot be generated, and the introduction is not successful.

The marker gene can only be used to indicate whether the target gene is introduced into the recipient cell, but he cannot say whether the target gene is expressed or not, only through DNA molecular hybridization.

Elective 1 Biotechnology BAI

Technique practice is taught.

DU is some knowledge of microbiology, fermentation theory and so on.

The answer may be difficult to understand, but the answer is simple.

Elective 2 Biotechnology and Society is a textbook for liberal arts students, but liberal arts students generally don't talk about it, which teacher is willing to waste valuable time to talk about something that is not tested in the college entrance examination.

Elective 3 Principles of Modern Biotechnology The content is mainly some modern high-tech biotechnology, such as genetic engineering, embryo engineering, cell engineering, etc., the questions are more difficult than the elective one, but if the difficulty of the usual practice questions keeps up, the exam is not a problem, but the specific choice of which book needs to depend on personal circumstances, if the conditions allow, it is best to choose as much as possible, so that you can choose the questions to answer the questions more simply during the exam.

All in all, as a science student, you only need to remember one choice, and the important thing to choose three is to understand.

Elective 3 is relatively easier to answer, and Elective 1 is somewhat difficult.

Elective three are all original words in the textbook I usually encounter when I do mock questions, and it is enough to cope with the college entrance examination.

Elective 3 is more up-to-date with the times, with high technology content, which is more useful for future universities.

Elective 3, just memorize the content of the book, if elective 1 is difficult, it is recommended to take elective 3.