SOLUTION OF Test No. 133 (MCQs on GS&A)
1. b) Sirius
- Explanation: Sirius is a star and not a part of our Solar System.
2. c) Distance
- Explanation: A light year is the distance that light travels in one year.
3. b) Desert Cyclone
- Explanation: Desert Cyclone is not a recognized type of cyclone.
4. c) Mitochondria
- Explanation: Mitochondria are the organelles responsible for energy production in the cell.
5. c) Aedes Mosquito
- Explanation: Dengue is transmitted by the bite of an infected Aedes mosquito.
6. b) Troposphere
- Explanation: The troposphere is the layer of the atmosphere closest to Earth's surface.
7. c) Kyoto Protocol
- Explanation: The Kyoto Protocol deals with the reduction of greenhouse gas emissions.
8. c) Carbohydrate
- Explanation: Carbohydrates are the primary source of energy for the body.
9. c) Salt
- Explanation: Salt has been used as a food preservative for thousands of years.
10. b) Excel
- Explanation: Excel is a spreadsheet program and not a social media website.
11. b) 150
- Explanation: If the average of 5 numbers is 30, then their sum is \(5 \times 30 = 150\).
12. b) 180 degrees
- Explanation: The sum of the angles in a triangle is always 180 degrees.
13. c) Can't say
- Explanation: The statements provided do not offer conclusive evidence that some roses fade.
14. b) 18
- Explanation: John's brother is 12/3 = 4 years old. In x years, John will be 12 + x and his brother will be 4 + x. When 12 + x = 2(4 + x), x = 6. Thus, John will be 18 when he's twice as old as his brother.
15. a) TIBSF
- Explanation: Each letter is shifted one place forward in the alphabet.
16. c) Calculating the area of a circle
- Explanation: Calculating the area requires numerical ability.
17. a) Solar Eclipse
- Explanation: A solar eclipse occurs when the moon passes between the Earth and the sun, blocking all or part of the sun.
18. c) Coal
- Explanation: Coal is a non-renewable fossil fuel.
19. b) Water
- Explanation: While water is essential for life and cellular processes, it is not considered a biomolecule like proteins, lipids, or carbohydrates.
20. a) Lithosphere
- Explanation: The lithosphere is the solid outermost shell of our planet, not a layer of the atmosphere.