CN210295596U

CN210295596U - Be used for central law presentation device

Info

Publication number: CN210295596U
Application number: CN201920882860.0U
Authority: CN
Inventors: 王兆胡
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-04-10
Anticipated expiration: 2029-06-13

Abstract

The utility model discloses a demonstration device for a central law, which comprises a fixed plate, a DNA replication model, a protein translation model and a DNA transcription model; the DNA replication model is arranged on the left side of the fixing plate and comprises a first chute, helicase, DNA molecules, DNA polymerase, a mother chain, a synthesized daughter chain and a second chute; the protein translation model is arranged in the middle of the fixing plate and comprises a ribosome, mRNA, tRNA, amino acid, a peptide chain, a third chute and a fourth chute, the DNA transcription model is arranged on the right side of the fixing plate and comprises a DNA chain, RNA polymerase, a coding chain, a template chain and a fifth chute. The utility model discloses can carry out the dynamic demonstration directly perceived to the central rule, improve the interest in learning of student to the knowledge point.

Description

Be used for central law presentation device

Technical Field

The utility model relates to a presentation device of education and teaching, concretely relates to be used for center rule presentation device.

Background

According to the literature, the central dogma refers to the process of transferring genetic information from DNA to RNA and then from RNA to protein, i.e. completing the transcription and translation of genetic information. It can also be transferred from DNA to DNA, i.e.the process of DNA replication is completed, which is a rule followed by all organisms with cellular structures.

In the process of central principle teaching, the process experiences complex biological changes, however, the complex biological changes can not be used for presenting details and dynamic processes related to DNA replication and gene expression events in high school biology by means of entity model dynamic display in real biological classroom teaching, and for the teaching difficulties with complex abstraction, no specific demonstration model exists, so that students cannot understand thoroughly, and no three-dimensional dynamic demonstration (teaching aid) model is widely used in teaching through retrieval.

Disclosure of Invention

The utility model provides a demonstration device for central law, which comprises a fixed plate, a DNA replication model, a protein translation model and a DNA transcription model; the DNA replication model is arranged on the left side of the fixing plate and comprises a first chute, helicase, DNA molecules, DNA polymerase, a mother chain, a synthesized daughter chain and a second chute, wherein the helicase is in sliding connection with the first chute, and the DNA polymerase is in sliding connection with the second chute; the protein translation model is arranged in the middle of the fixing plate and comprises a ribosome, mRNA, tRNA, amino acid, a peptide chain, a third chute and a fourth chute, wherein the tRNA and the third chute are arranged, and the fourth chute is vertically arranged at the lower end of the third chute; the DNA transcription model is arranged on the right side of the fixing plate and comprises a DNA chain, RNA polymerase, a coding chain, a template chain and a fifth chute, and the RNA polymerase is connected with the fifth chute in a sliding manner.

Furthermore, the amino acid is composed of plastic pellets with different colors, and iron sheets are arranged in the plastic pellets.

Furthermore, concave magnets are arranged between the peptide chains.

Further, the pairing between the tRNA and the mRNA, the synthesized daughter strand and the template strand is distinguished by different colors and paired by attraction to a magnet.

The utility model has the advantages that: intuition-abstract intracellular molecular biological events are visually and intuitively presented in a three-dimensional structure, so that the deep knowledge of learners on the microscopic world is improved;

dynamization-the expression of genes can be operated on the display board by an operator, and DNA polymerase, RNA polymerase and ribosome can move on the template strand and synthesize corresponding products, and the products are visualized and displayed in a three-dimensional way;

expansibility, namely, the teaching aid can be further refined and enriched on the basis of the existing teaching aid model structure, and has better compatibility;

simplicity, simple operation, low cost and strong visualization effect.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 shows a schematic structure of a peptide chain.

Reference numerals:

reference numeral 1 denotes a fixing plate, 2 denotes a DNA replication model, 21 denotes a first chute, 22 denotes helicase, 23 denotes a DNA molecule, 24 denotes DNA polymerase, 25 denotes a mother strand, 26 denotes a synthesized daughter strand, 27 denotes a second chute, 3 denotes a protein translation model, 31 denotes ribosome, 32 denotes mRNA, 33 denotes tRNA, 34 denotes amino acid, 35 denotes a peptide chain, 351 denotes a concave magnet, 36 denotes a third chute, 37 denotes a fourth chute, 4 denotes a DNA transcription model, 40 denotes a DNA strand, 41 denotes RNA polymerase, 42 denotes an encoding strand, 43 denotes a template strand, and 44 denotes a fifth chute.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 and 2, as shown in fig. 1 and 2, a device for demonstrating central laws includes a fixing plate 1, a DNA replication model 2, a protein translation model 3, a DNA transcription model 4; the DNA replication model 2 is arranged on the left side of the fixing plate 1, the DNA replication model 2 comprises a first chute 21, helicase 22, DNA molecules 23, DNA polymerase 24, a mother strand 25, a synthesized daughter strand 26 and a second chute 27, the helicase 22 is in sliding connection with the first chute 21, and the DNA polymerase 24 is in sliding connection with the second chute 27; the protein translation model 3 is arranged in the middle of the fixing plate 1, the protein translation model 3 comprises ribosomes 31, mRNA32, tRNA33, amino acids 34, peptide chains 35, a third chute 36, a fourth chute 37, tRNA33 and the third chute 36, the fourth chute 37 is vertically arranged at the lower end of the third chute 36, the amino acids 34 are composed of plastic pellets with different colors, iron sheets are arranged in the plastic pellets, and concave magnets 351 are arranged between the peptide chains 35; the DNA transcription model 4 is arranged at the right side of the fixing plate 1, the DNA transcription model 4 comprises a DNA chain 40, an RNA polymerase 41, a coding chain 42, a template chain 43 and a fifth chute 44, the RNA polymerase 41 is connected with the fifth chute 44 in a sliding way, the pairing of the tRNA33 and the mRNA32, the synthesized daughter chain 26 and the template chain 43 is distinguished by different colors, and is paired by magnet attraction.

The utility model discloses a working method: dividing the fixing plate 1 into three parts, wherein the left side is a DNA replication model 2, the helicase 22 moves on the first chute 21 to separate DNA molecules 23, and then the DNA polymerase 24 moves on the second chute 27 to polymerize the mother strand 25 and the synthesized daughter strand 26, so as to realize DNA replication demonstration; the right side is a DNA transcription model 4, RNA polymerase 41 moves on a fifth chute 44 to separate a DNA strand 40 into an encoding strand 42 and a template strand 43, the template strand 43 is paired with mRNA32, and the paired mRNA32 is sent to a protein translation model 3; the middle is a protein translation model 3, the ribosome 31 moves on mRNA32, the tRNA33 moves on the third chute 36 to be paired with mRNA32, the tRNA33 moves on the third chute 36, the amino acid 34 on the tRNA33 can be detached, and in the moving process, the amino acid 34 is attracted by a concave magnet to form a peptide chain 35.

The utility model has the advantages of reasonable structure, simple operation,

intuition-abstract intracellular molecular biological events are visually and intuitively presented in a three-dimensional structure, so that the deep knowledge of learners on the microscopic world is improved;

dynamization-the expression of genes can be operated on the display plate by an operator, and the DNA polymerase 24, the RNA polymerase 41 and the ribosome 31 can move on the template strand 43, so that corresponding products are synthesized, and visualized and displayed in a three-dimensional way;

simplicity, simple operation, low cost and strong visualization effect.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A demonstration device for laws of centres is characterized by comprising a fixing plate (1), a DNA replication model (2), a protein translation model (3) and a DNA transcription model (4); the DNA replication model (2) is arranged on the left side of the fixing plate (1), the DNA replication model (2) comprises a first chute (21), a helicase (22), a DNA molecule (23), a DNA polymerase (24), a mother strand (25), a synthesized daughter strand (26) and a second chute (27), the helicase (22) is in sliding connection with the first chute (21), and the DNA polymerase (24) is in sliding connection with the second chute (27); the protein translation model (3) is arranged in the middle of the fixing plate (1), the protein translation model (3) comprises a ribosome (31), an mRNA (32), a tRNA (33), an amino acid (34), a peptide chain (35), a third chute (36) and a fourth chute (37), the tRNA (33) and the third chute (36) are arranged, and the fourth chute (37) is vertically arranged at the lower end of the third chute (36); the DNA transcription model (4) is arranged on the right side of the fixing plate (1), the DNA transcription model (4) comprises a DNA chain (40), an RNA polymerase (41), a coding chain (42), a template chain (43) and a fifth sliding chute (44), and the RNA polymerase (41) is connected with the fifth sliding chute (44) in a sliding mode.

2. The demonstration apparatus for laws of centers as claimed in claim 1, wherein said amino acids (34) are composed of plastic pellets of different colors, said plastic pellets being provided with iron pieces therein.

3. Demonstration device for the laws of centres according to claim 1, characterized in that between said chains of peptides (35) there are provided concave magnets (351).

4. The demonstration device for central laws according to claim 1, wherein the pairing of the tRNA (33) with the mRNA (32), the synthesized daughter strand (26), the template strand (43) is distinguished by different colors and paired by attraction of magnets.