[B] ribosome Unlike a eukaryotic cell, a prokaryotic cell lacks membrane-bound organelles such as plastids, mitochondria and endoplasmic reticulum, but small and randomly scattered ribosomes are observed.
[B] ribosome
Unlike a eukaryotic cell, a prokaryotic cell lacks membrane-bound organelles such as plastids, mitochondria and endoplasmic reticulum, but small and randomly scattered ribosomes are observed.
Characteristics of a modern land fill include i. Methods to contain leachate such as lining clay or plastic liners. iii. Compaction and covering of the waste to prevent it being blown by wind. iv. Installation of a land fill gas extraction system to extract the gas for use in generation of power.
Characteristics of a modern land fill include
i. Methods to contain leachate such as lining clay or plastic liners.
iii. Compaction and covering of the waste to prevent it being blown by wind.
iv. Installation of a land fill gas extraction system to extract the gas for use in generation of power.
Transgenic animals are products of genetic engineering and express specific gene(s) from totally unrelated source. Following are the four main areas where they can be utilised. 1. To study normal physiology and development these animals can be used to study as to which factor / gene products are neeRead more
Transgenic animals are products of genetic engineering and express specific gene(s) from totally unrelated source. Following are the four main areas where they can be utilised.
1. To study normal physiology and development these animals can be used to study as to which factor / gene products are needed at what time of development. By expression of certain genes, they help scientists to understand the normal gene expression at various stages of growth and development.
2. Study of Diseases
Transgenic animals can be created to serve as models for various human diseases. They also help us understand the involvement of various genes in diseases like cancer, Parkinson’ disease etc.
3. Vaccine safety
Transgenic animals can be used to test vaccines like polio vaccine. Transgenic mice have shown promising results in this area and would replace the vaccine testing on monkeys in the years to come.
4. Chemical safety testing
Transgenic animals are created which are more sensitive to certain chemicals / drugs. These are used to study the toxicity or side effects of that chemical / drug. The advantage is that we get results faster
Discarded unusable electronic gadgets such as computers, mobile phones, circuits, television sets, etc., form electronic waste. These contain harmful toxic substances like heavy metals to which the unskilled manual workers are directly exposed.
Discarded unusable electronic gadgets such as computers, mobile phones, circuits, television sets, etc., form electronic waste. These contain harmful toxic substances like heavy metals to which the unskilled manual workers are directly exposed.
1. Insulin being a hormone is produced in very little amounts in the body. Hence, a large number of animals need to be sacrificed for obtaining small quantities of insulin. This makes the cost of insulin very high. [Demand being many fold higher than supply]. 2. Slaughtering of animals is also not eRead more
1. Insulin being a hormone is produced in very little amounts in the body. Hence, a large number of animals need to be sacrificed for obtaining small quantities of insulin. This makes the cost of insulin very high. [Demand being many fold higher than supply].
2. Slaughtering of animals is also not ethical.
3. There is potential of immune response in humans against the administered insulin which is derived from animals.
4. There is possibility of slaughtered animals being infested with some infectious micro organism which may contaminate insulin.
The only cell organelle seen in prokaryotic cell
[B] ribosome Unlike a eukaryotic cell, a prokaryotic cell lacks membrane-bound organelles such as plastids, mitochondria and endoplasmic reticulum, but small and randomly scattered ribosomes are observed.
[B] ribosome
See lessUnlike a eukaryotic cell, a prokaryotic cell lacks membrane-bound organelles such as plastids, mitochondria and endoplasmic reticulum, but small and randomly scattered ribosomes are observed.
What are the basic characteristics of a modern land fill sites. List any three and mention the reasons for their use.
Characteristics of a modern land fill include i. Methods to contain leachate such as lining clay or plastic liners. iii. Compaction and covering of the waste to prevent it being blown by wind. iv. Installation of a land fill gas extraction system to extract the gas for use in generation of power.
Characteristics of a modern land fill include
See lessi. Methods to contain leachate such as lining clay or plastic liners.
iii. Compaction and covering of the waste to prevent it being blown by wind.
iv. Installation of a land fill gas extraction system to extract the gas for use in generation of power.
Define transgenic animals. Explain in detail any four areas where they can be utilised.
Transgenic animals are products of genetic engineering and express specific gene(s) from totally unrelated source. Following are the four main areas where they can be utilised. 1. To study normal physiology and development these animals can be used to study as to which factor / gene products are neeRead more
Transgenic animals are products of genetic engineering and express specific gene(s) from totally unrelated source. Following are the four main areas where they can be utilised.
See less1. To study normal physiology and development these animals can be used to study as to which factor / gene products are needed at what time of development. By expression of certain genes, they help scientists to understand the normal gene expression at various stages of growth and development.
2. Study of Diseases
Transgenic animals can be created to serve as models for various human diseases. They also help us understand the involvement of various genes in diseases like cancer, Parkinson’ disease etc.
3. Vaccine safety
Transgenic animals can be used to test vaccines like polio vaccine. Transgenic mice have shown promising results in this area and would replace the vaccine testing on monkeys in the years to come.
4. Chemical safety testing
Transgenic animals are created which are more sensitive to certain chemicals / drugs. These are used to study the toxicity or side effects of that chemical / drug. The advantage is that we get results faster
Write a short note on electronic waste. List the various sources of e- wastes and the problems associated with the disposal of e-waste.
Discarded unusable electronic gadgets such as computers, mobile phones, circuits, television sets, etc., form electronic waste. These contain harmful toxic substances like heavy metals to which the unskilled manual workers are directly exposed.
Discarded unusable electronic gadgets such as computers, mobile phones, circuits, television sets, etc., form electronic waste. These contain harmful toxic substances like heavy metals to which the unskilled manual workers are directly exposed.
See lessList the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs:
1. Insulin being a hormone is produced in very little amounts in the body. Hence, a large number of animals need to be sacrificed for obtaining small quantities of insulin. This makes the cost of insulin very high. [Demand being many fold higher than supply]. 2. Slaughtering of animals is also not eRead more
1. Insulin being a hormone is produced in very little amounts in the body. Hence, a large number of animals need to be sacrificed for obtaining small quantities of insulin. This makes the cost of insulin very high. [Demand being many fold higher than supply].
See less2. Slaughtering of animals is also not ethical.
3. There is potential of immune response in humans against the administered insulin which is derived from animals.
4. There is possibility of slaughtered animals being infested with some infectious micro organism which may contaminate insulin.