NSO Level 1- Science Olympiad (SOF) Class 12: Questions 33 - 36 of 60
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Question number: 33
» Biology » Biology in Human Welfare
Question
How many times is the Urine produced by the human kidney concentrated than the initial filtrate formed?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 1200 |
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| b. | 4 |
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| c. | 20 |
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| d. | 2 |
|
Question number: 34
» Biology » Biotechnology
Question
What is the most challenging issue that genome sequencing is facing?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Inability to develop fast and accurate sequencing techniques |
|
| b. | The ethics of using information from genomes at individual level |
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| c. | DNA availability and stability |
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| d. | All of the above |
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Question number: 35
» Biology » Genetics and Evolution
Question
Crime investigators found a small sample of blood at the crime site. Only a small amount of DNA could be extracted from the place and there is requirement of more DNA. How can they amplify this small quantity?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Subjecting the DNA sample to polymerase chain reaction. |
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| b. | Subjecting the DNA sample to electrophoresis |
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| c. | By using a molecular probe |
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| d. | By treating DNA sample with restriction enzymes |
|
Question number: 36
Question
From the statements given below select those which are incorrect for acid rain.
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Sulphur and nitrogen oxides are released from industries, exhausts, power plants, etc.
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Rainfall and other precipitation forms with a pH of less than 5 refer to acid rain.
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Nitrogen and sulphur oxides undergo reaction with water in air and form nitric acid and sulphuric acid.
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There are harmful effects on human beings and animals by acid rain but no effect by plants.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 2 and 4 |
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| b. | 1 and 3 |
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| c. | 4 only |
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| d. | 2 only |
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