Q1. What are Nanozymes?
(a) Tiny robots used in medical surgeries to repair damaged tissues.
(b) Natural enzymes found in microorganisms.
(c) Nanoparticles with enzyme-like catalytic properties.
(d) Microscopic organisms used in bioremediation processes.
Ans: (c)
Explanation:
- Nanozymes are nanomaterials that possess enzyme-like properties. Unlike natural enzymes, which are typically proteins, nanozymes are typically made of inorganic materials such as nanoparticles. These nanostructures can catalyze chemical reactions in a manner similar to enzymes
Q2. In which of the following states is Dandeli Wildlife Sanctuary located?
(a) Goa
(b) Maharashtra
(c) Karnataka
(d) Kerala
Ans: (c)
Explanation: About Dandeli Wildlife Sanctuary:
- It lies within the Kali Tiger Reserve (KTR) (Uttara Kannada District of Karnataka) along with Anshi National Park.
- KTR is a UNESCO World Heritage Site and global biodiversity hotspot. The reserve derives its name from the Kali River, which flows through the region. The ecoregions found here, namely the North Western Ghats montane rainforests and North Western Ghats moist deciduous forests.
Q3. With reference to Indian Kali Tiger Reserve (KTR) consider the following statements:
- It is located in the state of Karnataka.
- It comprises four important protected areas of the region.
- It is an integral part of the Western Ghats landscape.
How many of the statements given above is/are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
Ans: (b)
Explanation:
- Kali Tiger Reserve is located in Uttara Kannada District of Karnataka State. Covering the taluks of Dandeli, Haliyal, Karwar and Joida.
- The Tiger Reserve comprises of two important protected areas of the region viz., Dandeli Wildlife Sanctuary and Anshi National Park. Dandeli Wildlife Sanctuary (475.018 sq km) and Anshi National Park (339.866 sq km) are contiguous to each other and form a single tract of protected area located in biologically sensitive Western Ghats.
Q4. Which of the following statements about amphibian species is correct?
(a) Amphibians are exclusively aquatic animals.
(b) Amphibians have a backbone (vertebral column).
(c) Amphibians are cold-blooded, maintaining a constant body temperature.
(d) Amphibians typically lay eggs with hard shells like reptiles.
Ans: (c)
Explanation:
- Context: A global assessment conducted by conservationists reveals that Earth’s amphibian species are facing a critical threat of extinction.
- Option B This statement is correct. Amphibians are vertebrates, meaning they have a backbone or vertebral column. This characteristic places them in the same category as other vertebrates like fish, reptiles, birds, and mammals.
- Option A This statement is incorrect. While many amphibians do spend part of their lives in aquatic environments, such as tadpoles living in water, they are not exclusively aquatic. Adult amphibians often live on land, although they require access to water for breeding and moisture.
- Option C This statement is incorrect. Amphibians are ectothermic or cold-blooded animals, meaning their body temperature fluctuates with the temperature of their environment. They do not maintain a constant internal body temperature like warm-blooded (endothermic) animals.
- Option D This statement is incorrect. Amphibians typically lay eggs with soft, jelly-like membranes, not hard shells like reptiles. These eggs need to be laid in moist environments because they lack the protective hard shell that reptile eggs have.
Q5. Water can dissolve more substances than any other liquid because:
(a) it is dipolar in nature
(b) it is a good conductor of heat
(c) it has high value of specific heat
(d) it is an oxide of hydrogen
Ans: (a)
Explanation:
- Water can dissolve more substances than any other liquid because it is dipolar in nature. This means that water molecules have a positive end and a negative end, which allows them to form hydrogen bonds with other polar molecules and ions.
