Class 8th Science Chapter 3 Biotechnology

Class 8th Science Chapter 3 Biotechnology

Class 8th Science Chapter 3 Biotechnology
Class 8th Science Chapter 3 Biotechnology

Class 8th Science Chapter 3 Biotechnology . Biotechnology is the use of organisms, parts of organisms, or processes performed by organisms to help humans / make life easier.

Class 8th Science Chapter 3 Biotechnology
Class 8th Science Chapter 3 Biotechnology

Class 8th Science Chapter 3 Biotechnology

Agriculture and the selective breeding of organisms and the production of products such as soy sauce, alcohol and bread with leaves are examples of this long-term use of biotechnology.

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SHORT ANSWERS

Q1.Define biotechnology.

Ans: The use of living organisms and their products for the welfare of humanity is called biotechnology.

Q2. Write some important products of biotechnology.

Ans. Bakery products, yogurt, bread, cheese, vinegar, insulin, vaccines, antibiotics, washing detergents, sugar, plastics, modified food crops and modified animals.

Q3. What are genetically modified organisms?

Ans: The organisms whose genes are modified are called genetically modified organisms.

Q4. What is DNA replication? Explain.

Ans. DNA replication is the process in which DNA makes similar copies of itself. This replication takes place in the nucleus during cell division.

Q5. Draw a labeled diagram of bacterium.

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DETAILED ANSWERS

Q1. Explain the process of introducing gene into bacteria.

Ans: The following process is used to introduce gene into bacteria.

  1. Identify, isolate and cut gene of interest from the donor organism.
  2. Attach the isolated gene with plasmid DNA taken from bacteria to make a recombinant DNA.
  3. The recombinant DNA is then introduced into a bacterium.
  4. Division of the DNA starts and produces the desired product.

Q2. Describe the role of biotechnology in agriculture and health.

Ans: Biotechnology in agriculture

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  1. Herbicides eliminate weeds and pesticides kill pests to protect crops.
  2. Weed and pest resistant genes are introduced into plants.
  3. Quality and quantity of food has improved.
  4. Taste, texture and appearance of food have improved.

Biotechnology in health

  1. Biotechnology helps to identify causes of diseases.
  2. Biotechnology helps to produce new medicines.
  3. Biotechnology corrects genetic defects.
  4. Insulin and vaccines are some of the products of biotechnology.

Q3. Describe the role of biotechnology in meeting the nutritional needs of human beings.

Ans. Biotechnology plays a major role in meeting the nutritional needs of human beings.

It has improved the quality of food. It has improved the taste, texture and appearance of food. It has increased the quantity of food. Yield per acre has been increased. We can get more milk and meat from modified animals.

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  1. Pingback: Class 8th Science Chapter 4 POLLUTANTS AND THEIR EFFECTS ON ENVIRONMENT - Daraz 24

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