1. Consider the following statements:
- Some microorganisms can grow in environments with temperature above the boiling point of water.
- Some microorganisms can grow in environments with temperature below the freezing point of water.
- Some microorganisms can grow in a highly acidic environment with a pH below 3.
How many of the above statements are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
2. With reference to green hydrogen, consider the following statements:
- It can be used directly as a fuel for internal combustion.
- It can be blended with natural gas and used as fuel for heat or power generation.
- It can be used in the hydrogen fuel cell to run vehicles.
How many of the above statements are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
3. ‘Wolbachia method’ is sometimes talked about with reference to which one of the following?
(a) Controlling the viral diseases spread by mosquitoes
(b) Converting crop residues into packing material
(c) Producing biodegradable plastics
(d) Producing biochar from thermo-chemical conversion of biomass
4. ‘Aerial metagenomics’ best refers to which one of the following situations?
(a) Collecting DNA samples from air in a habitat at one go
(b) Understanding the genetic makeup of avian species of a habitat
(c) Using air-bome devices to collect blood samples from moving animals
(d) Sending drones to inaccessible areas to collect plant and animal samples from land surfaces and water bodies
5. ‘Microsatellite DNA’ is used in the case of which one of the following?
(a) Studying the evolutionary relationships among various species of fauna
(b) Stimulating ‘stem cells’ to transform into diverse functional tissues
(c) Promoting clonal propagation of horticultural plants
(d) Assessing the efficacy of drugs by conducting series of drug trials in a population
6 Consider the following actions:
- Detection of car crash/collision which results in the deployment of airbags almost instantaneously.
- Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive
- Detection of the tit of smartphone which results in the rotation of display between portrait and landscape mode
In how many of the above action is the function of accelerometer required?
(a) Only one
(b) Only two
(c) All three
(d) None
7. With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements:
- Biofilters provide waste treatment by removing uneaten fish feed.
- Biofilters convert ammonia present in fish waste to nitrate.
- Biofilters increase phosphorus as a nutrient for fish in water.
How many of the statements given above are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
8. Consider the following pairs:
| Objects in space | Description | |
| 1. | Cepheids | Giant clouds of dust and gas in space |
| 2. | Nebulae | Stars which brighten and dim periodically |
| 3. | Pulsars | Neutron stars that are formed when massive stars run out of fuel and collapse |
How many of the above pairs are correctly matched?
(a) Only one
(b) Only two
(c) All three
(d) None
9. Consider the following statements:
- Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket powered only in the initial phase of flight.
- Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2