# Spider silk

- 科目：雅思阅读真题（Part 2）
- 考频：高频
- 最近考试：2019.5.11
- 题目数：13
- 来源页：https://www.yaquan.site/paper/4cb99c97-d973-4f96-bf8f-1a9648f08683（在线机考练习与音频请访问该页面）
- 数据更新：2026-10-29

## 题目原文

A strong, light bio-material made by genes from spiders could transform construction and industry. 
 
 A 
 Scientists have succeeded in copying the silk-producing gene of the Golden Orb Weaver spider and are using them to create a synthetic material which they believe is the model for a new generation of advanced bio-materials.The new material,bio-silk,which has been spun for the first time by researchers at DuPont,has an enormous range of potential uses in construction and manufacturing. 
 
 B 
 The attraction of the silk spun by the spider is a combination of great strength and enormous elasticity,which man-made fibres have been unable to replicate. On an equal-weight basis, spider silk is far stronger than steel and it is estimated that if a single strand could be made about 10m in diameter,it would be strong enough to stop a jumbo jet in flight.A third important factor is that it is extremely light.Army scientists are already looking at the possibilities of using it for lightweight, bullet- proof vests and parachutes. 
 
 C 
 For some time,biochemists have been trying to synthesise the drag-line silk of the Golden Orb Weaver.The drag-line silk, which forms the radial arms of the web,is stronger than the other parts of the web and some biochemists believe a synthetic version could prove to be as important a material as nylon, which has been around for 50 years, since the discoveries of Wallace Carothers and his team ushered in the age of polymers. 
 
 D 
 To recreate the material, scientists, including Randolph Lewis at the University of Wyoming, first examined the silk-producing gland of the spider. "We took out the glands that produce the silk and looked at the coding for the protein material they make, which is spun into a web. We then went looking for clones with the right DNA," he says. 
 
 E 
 At DuPont, researchers have used both yeast and bacteria as hosts to grow the raw material, which they have spun into fibres. Robert Dorsch, DuPont’s director of biochemical development, says the globules of protein, comparable with marbles in an egg, are harvested and processed. "We break open the bacteria, separate out the globules of protein and use them as the raw starting material. With yeast, the gene system can be designed so that the material excretes the protein outside the yeast for better access," he says. which they have spun into fibres. Robert Dorsch, DuPont’s director of biochemical development, says the globules of protein, comparable with marbles in an egg, are harvested and processed. "We break open the bacteria, separate out the globules of protein and use them as the raw starting material. With yeast, the gene system can be designed so that the material excretes the protein outside the yeast for better access," he says. 
 
 F 
 "The bacteria and the yeast produce the same protein, equivalent to that which the spider uses in the drag lines of the web. The spider mixes the protein into a water-based solution and then spins it into a solid fibre in one go. Since we are not as clever as the spider and we are not using such sophisticated organisms, we substituted man-made approaches and dissolved the protein in chemical solvents, which are then spun to push the material through small holes to form the solid fibre.” 
 
 G 
 Researchers at DuPont say they envisage many possible uses for a new biosilk material. They say that earthquake-resistant suspension bridges hung from cables of synthetic spider silk fibres may become a reality. Stronger ropes, safer seat belts, shoe soles that do not wear out so quickly and tough new clothing are among the other applications. Biochemists such as Lewis see the potential range of uses of biosilk as almost limitless. "It is very strong and retains elasticity; there are no man-made materials that can mimic both these properties. It is also a biological material with all the advantages that has over petrochemicals," he says. 
 
 H 
 At DuPond’s laboratories, Dorsc h is excited by the prospect of new super-strong materials but he warns they are many years away. "We are at an early stage but theoretical predictions are that we will wind up with a very strong, tough material, with an ability to absorb shock, which is stronger and tougher than the man-made materials that are conventionally available to us," he says. 
 
 I 
 The spider is not the only creature that has aroused the interest of material scientists. They have also become envious of the natural adhesive secreted by the sea mussel. It produces a protein adhesive to attach itself to rocks. It is tedious and expensive to extract the protein from the mussel, so researchers have already produced a synthetic gene for use in surrogate bacteria.

## 题目与答案

### 14. a comparison of the ways two materials are used to replace silk-producing glands.

a comparison of the ways two materials are used to replace silk-producing glands.

- A
- B
- C
- D
- E
- F

**答案**：E

原文定位：At DuPont, researchers have used both yeast and bacteria as hosts to grow the raw material, which they have spun into fibres;We break open the bacteria, separate out the globules of protein and use them as the raw starting material. With yeast, the gene system can be designed so that the material excretes the protein outside the yeast for better access," he says

### 15. predictions regarding the availability of the synthetic silk.

predictions regarding the availability of the synthetic silk.

- A
- B
- C
- D
- E
- F

**答案**：H

原文定位：Dorsc h is excited by the prospect of new super-strong materials but he warns they are many years away;We are at an early stage but theoretical predictions are that we will wind up with a very strong;tough material;

同义替换：「availability」↔「at an early stage」；「synthetic silk」↔「new super-strong materials」

### 16. on-going research into other synthetic materials.

on-going research into other synthetic materials.

- A
- B
- C
- D
- E
- F

**答案**：I

原文定位：The spider is not the only creature that has aroused the interest of material scientists;They have also become envious of the natural adhesive secreted by the sea mussel

同义替换：「on-going research」↔「aroused the interest of material scientists」；「other synthetic materials」↔「natural adhesive secreted by the sea mussel」

### 17. the research into the part of the spider that manufactures silk.

the research into the part of the spider that manufactures silk.

- A
- B
- C
- D
- E
- F

**答案**：D

原文定位：To recreate the material, scientists, including Randolph Lewis at the University of Wyoming, first examined the silk-producing gland of the spider

同义替换：「research」↔「examined」；「the part of the spider that manufactures silk」↔「silk-producing gland of the spider」

### 18. the possible application of the silk in civil engineering.

the possible application of the silk in civil engineering.

- A
- B
- C
- D
- E
- F

**答案**：G

原文定位：They say that earthquake-resistant suspension bridges hung from cables of synthetic spider silk fibres may become a reality

同义替换：「application」↔「uses」；「civil engineering」↔「earthquake-resistant suspension bridges」；「silk」↔「synthetic spider silk fibres」

### 19. Synthetic gene growth in 19_____ or 20_____ ↓

Synthetic gene growth in 19_____ or 20_____ ↓

**答案**：yeast|||bacteria

原文定位：At DuPont, researchers have used both yeast and bacteria as hosts to grow the raw material, which they have spun into fibres

### 20. globules of 21_____ ↓

globules of 21_____ ↓

**答案**：protein

原文定位：We break open the bacteria, separate out the globules of protein and use them as the raw starting material

### 21. dissolved in 22_____ ↓

dissolved in 22_____ ↓

**答案**：chemical solvents

原文定位：we substituted man-made approaches and dissolved the protein in chemical solvents

### 23. passed through 23_____ ↓

passed through 23_____ ↓

**答案**：small holes

原文定位：dissolved the protein in chemical solvents, which are then spun to push the material through small holes to form the solid fibre

### 24. to produce 24_____

to produce 24_____

**答案**：solid fibre

原文定位：dissolved the protein in chemical solvents, which are then spun to push the material through small holes to form the solid fibre

同义替换：「produce」↔「form」

### 25. 25 Biosilk has already replaced nylon in parachute manufacture.

25 Biosilk has already replaced nylon in parachute manufacture.

- TRUE
- FALSE
- NOT GIVEN

**答案**：FALSE

原文定位：Army scientists are already looking at the possibilities of using it for lightweight, bullet- proof vests and parachutes

同义替换：「has already replaced」↔「looking at the possibilities」

### 26. 26 The spider produces silk of varying strengths.

26 The spider produces silk of varying strengths.

- TRUE
- FALSE
- NOT GIVEN

**答案**：TRUE

原文定位：The drag-line silk, which forms the radial arms of the web, is stronger than the other parts of the web

同义替换：「varying strengths」↔「stronger than the other parts」；「spider produces silk」↔「other parts of the web」

### 27. 27 Lewis and Dorsch co-operated in the synthetic production of silk.

27 Lewis and Dorsch co-operated in the synthetic production of silk.

- TRUE
- FALSE
- NOT GIVEN

**答案**：NOT GIVEN

原文定位：Randolph Lewis;Robert Dorsch

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