With reference to carbon nanotubes, consider the following statements:
1. They can be used as carriers of drugs and antigens in the human body.
2. They can be made into artificial blood capillaries for an injured part of the human body.
3. They can be used in biochemical sensors.
4. Carbon nanotubes are biodegradable.
Which of the statements given above are correct?
1 and 2 only
2, 3 and 4 only
1, 3 and 4 only
1, 2, 3 and 4
The question asks to identify the correct statements regarding the applications and properties of carbon nanotubes (CNTs). We need to evaluate each statement based on current scientific understanding and research in nanotechnology.
Based on the evaluation:
Therefore, statements 1, 3, and 4 are correct.
Correct Option: C) 1, 3 and 4 only
Consider the following activities:
1. Spraying pesticides on a crop field
2. Inspecting the craters of active volcanoes
3. Collecting breath samples from spouting whales for DNA analysis
At the present level of technology,
which of the above activities can be successfully carried out by using drones?
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
The question asks to identify which of the given activities can be successfully carried out using drones with current technology. We need to evaluate each activity individually based on the capabilities of modern drones.
Since all three activities can be successfully carried out using drones at the present level of technology, the correct option includes all of them.
Correct Option: D) 1, 2 and 3
The question describes a space experiment involving three spacecraft flying in an equilateral triangle formation with lasers shining between them, with sides one million kilometers long. This setup is characteristic of a space-based gravitational wave observatory. We need to identify which mission fits this description.
D) Evolved LISA. The description of three spacecraft forming an equilateral triangle with lasers shining between them over millions of kilometers is the defining characteristic of the Laser Interferometer Space Antenna (LISA) mission, which was previously known as Evolved LISA (eLISA). This mission is designed to detect gravitational waves in space.
Consider the following statements:
1. Genetic changes can be introduced in the cells that produce eggs or sperms of a prospective parent.
2. A person's genome can be edited before birth at the early embryonic stage.
3. Human induced pluripotent stem cells can be injected into the embryo of a pig.
Which of the statements given above is/are correct?
The question asks to evaluate three statements related to genetic engineering and biotechnology. We need to determine the correctness of each statement based on current scientific understanding and technological capabilities.
D) 1, 2 and 3
All three statements are correct based on current scientific understanding and technological advancements in genetic engineering and biotechnology. Germline editing, embryonic gene editing, and the creation of human-animal chimeras using iPSCs are all areas of active research and development, though they raise significant ethical and regulatory discussions.
What is the importance of using Pneumococcal Conjugate Vaccines in India?
1. These vaccines are effective against pneumonia as well as meningitis and sepsis.
2. Dependence on antibiotics that are not effective against drug-resistant bacteria can be reduced.
3. These vaccines have no side effects and cause no allergic reactions.
Select the correct answer using the code given below:
The question asks about the importance of Pneumococcal Conjugate Vaccines (PCVs) in India. We need to evaluate each given statement to determine its correctness regarding PCVs.
Based on the analysis, statements 1 and 2 are correct, while statement 3 is incorrect.
Correct Option: B) 1 and 2 only
The question asks about the context in which the term "Public Key Infrastructure" (PKI) is used in India. Understanding what PKI is and its primary function will help identify the correct option.
Correct Option: A) Digital security infrastructure
Which of the following statements are correct regarding the general difference between plant and animal cells?
1. Plant cells have cellulose cell walls whilst animal cells do not.
2. Plant cells do not have plasma membranes, unlike animal cells which do.
3. Mature plant cell has one large vacuole whilst animal cell has many small vacuoles.
Select the correct answer using the code given below:
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
The question asks to identify the correct statements regarding the general differences between plant and animal cells. We need to evaluate each statement based on our knowledge of cell biology.
Correct Option: C) Statements 1 and 3 are correct.
Which of the following are the reasons/factors for exposure to benzene pollution?
1. Automobile exhaust
2. Tobacco smoke
3. Wood burning
4. Using varnished wooden furniture
5. Using products made of polyurethane
Select the correct answer using the code given below:
1, 2 and 3 only
2 and 4 only
1,3 and 4 only
1, 2, 3, 4 and 5
The question asks to identify the sources of benzene pollution from a given list of factors. We need to evaluate each factor to determine if it contributes to benzene exposure.
Based on this analysis, factors 1, 2, and 3 are significant sources of benzene pollution.
Correct Option: A) 1, 2 and 3 only
If another global financial crisis happens in the near future, which of the following actions/policies are most likely to give some immunity to India?
1. Not depending on short-term foreign borrowings
2. Opening up to more foreign banks
3. Maintaining full capital account convertibility
Select the correct answer using the code given below:
The question asks which actions or policies would likely provide immunity to India during a global financial crisis. We need to evaluate each statement based on its potential impact on financial stability and vulnerability to external shocks.
A) 1 only. Based on the evaluation, only statement 1, "Not depending on short-term foreign borrowings," is likely to provide immunity to India during a global financial crisis by reducing vulnerability to sudden capital outflows.
The question asks about the immediate effect of withdrawing cash from a bank account on the aggregate money supply. To answer this, we need to understand the components of money supply and how a cash withdrawal affects these components.
D) to leave it unchanged. The withdrawal of cash from a demand deposit account is merely a change in the form of money held by the public (from bank deposits to physical cash). Both are components of the narrow money supply (M1), and thus the total M1 remains constant.