Q: Olive ridley is related to:

A: turtle

B: cease fire violations

C: terrorist killings

D: migratory bird



Correct Option: A  [ turtle ]

Remark:

Explanation: The Olive Ridley turtle (Lepidochelys olivacea) is the smallest and most abundant species of sea turtle found primarily in warm and tropical waters, including the Indian Ocean. It is named for the olive color of its shell. These turtles are famous for their unique mass nesting phenomenon known as “arribada”, where thousands of females come ashore simultaneously to lay eggs. In India, large nesting sites are found along the coast of Odisha, especially at Gahirmatha Beach and the Rushikulya River mouth.


Q: Curie point is the temperature at which:

A: matter becomes radioactive

B: a metal loses magnetic properties

C: a metal loses conductivity

D: transmutation of metal occurs



Correct Option: B  [ a metal loses magnetic properties ]

Remark:

Explanation: The Curie point (or Curie temperature) is the temperature above which a ferromagnetic material loses its magnetic properties and becomes paramagnetic. At this point, thermal energy overcomes the magnetic alignment of atoms. For example, the Curie temperature of iron is about 770°C.


Q: Which of the following is used to express the speed of internet connectivity ?

A: Mb / sec

B: Mb

C: Herz

D: Kb



Correct Option: A  [ Mb / sec ]

Remark:

Explanation: The speed of internet connectivity is expressed in Megabits per second (Mb/sec or Mbps). It indicates how much data is transferred per second over a network connection. One megabit equals 1,000,000 bits. Higher Mbps values mean faster internet speeds. For example, a 100 Mbps connection can transfer 100 million bits of data every second. Note that 1 byte = 8 bits, so internet speeds in Mbps differ from file sizes, which are usually measured in megabytes (MB).


Q: Compound microscope has

A: two lenses

B: requires UV light source

C: used to view only dead organisms

D: requires large room space



Correct Option: A  [ two lenses ]

Remark:


Q: An endoscope is used by a physician to view the internal parts of a body organ. It is based on the principle of:

A: refraction of light

B: reflection of light

C: total internal reflection of light

D: dispersion of light



Correct Option: C  [ total internal reflection of light ]

Remark:

Explanation: An endoscope works on the principle of total internal reflection of light. It uses optical fibers to transmit light into the body and carry the reflected image back to the observer. This allows physicians to view internal organs without surgery.


Q: The ingredient that assists clotting of blood is:

A: Vitamin A

B: Folic acid

C: Vitamin D

D: Vitamin K



Correct Option: D  [ Vitamin K ]

Remark:

Explanation: Vitamin K plays a crucial role in the blood clotting process. It helps the liver synthesize prothrombin and other clotting factors required to stop bleeding when injuries occur. Deficiency of Vitamin K can lead to excessive bleeding and delayed clot formation. Green leafy vegetables, broccoli, spinach, and intestinal bacteria are major natural sources of this vitamin.


Q: Which among the following is respiratory pigment in human beings?

A: Melanin

B: Haemoglobin

C: Rhodopsin

D: Bilirubin



Correct Option: B  [ Haemoglobin ]

Remark:

Explanation: Haemoglobin is a complex iron-containing protein found in red blood cells (RBCs). It binds with oxygen in the lungs to form oxyhaemoglobin and releases it in tissues where oxygen levels are low. It also helps transport carbon dioxide from tissues back to the lungs. This oxygen-carrying property makes haemoglobin the essential respiratory pigment in humans and most vertebrates.


Q: Volumetric method for determination of fat % of milk is:

A: Waste fall balance

B: Soxhlet method

C: Richmond sliding method

D: Garber method



Correct Option: D  [ Garber method ]

Remark:


Q: Which of the following contains maximum carbon dioxide ?

A: Grasslands

B: Forests

C: Oceans

D: Agroecosystems



Correct Option: C  [ Oceans ]

Remark:

Explanation: Oceans contain the maximum amount of carbon dioxide (CO₂) on Earth. They act as the largest carbon sink, absorbing CO₂ from the atmosphere and storing it in dissolved form or as carbonates. This helps regulate the global carbon cycle and maintain atmospheric balance.


Q: Number of spinal nerves in human are:

A: 11 pairs

B: 27 pairs

C: 32 pairs

D: 31 pairs



Correct Option: D  [ 31 pairs ]

Remark:

Explanation: In humans, the spinal cord gives rise to 31 pairs of spinal nerves. Each spinal nerve is a mixed nerve containing both sensory and motor fibers. They are divided into groups based on the region of the vertebral column from which they originate:

  • 8 pairs — Cervical nerves
  • 12 pairs — Thoracic nerves
  • 5 pairs — Lumbar nerves
  • 5 pairs — Sacral nerves
  • 1 pair — Coccygeal nerve

These spinal nerves connect the central nervous system (CNS) to different parts of the body, transmitting sensory information to the brain and motor commands to muscles.

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