Q: The amount of light entering into eye can be controlled and regulated by ___________ .

A: Sclera

B: cornea

C: pupil

D: retina



Correct Option: C  [ pupil ]

Remark:

Explanation: The pupil is the central opening in the iris that regulates the entry of light into the eye. In bright light, the iris contracts, making the pupil smaller (a process called constriction), while in dim light, it enlarges (known as dilation). This automatic adjustment, known as the pupillary reflex, helps protect the retina from excessive light and ensures clear vision in varying light condit


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 number of protons in an alpha particle is :

A: one

B: two

C: three

D: four



Correct Option: B  [ two ]

Remark:

Explanation: An alpha particle (α-particle) is a positively charged particle that consists of two protons and two neutrons, the same as the nucleus of a helium atom (He²⁺). It carries a +2 charge because of the two protons and has a mass number of 4. Alpha particles are emitted during the radioactive decay of heavy elements such as uranium, radium, and thorium. They have high ionizing power but low penetration ability and can be stopped by a sheet of paper or human skin.


Q: RADAR is used for

A: locating submerged submarines

B: receiving signals in a radio receiver

C: locating geostationary satellites

D: detecting and locating the position of objects such as aeroplane



Correct Option: D  [ detecting and locating the position of objects such as aeroplane ]

Remark:


Q: In coriander the useful parts are:

A: roots &leaves

B: leaves & flowers

C: leaves & dried fruits

D: flower& dried fruits



Correct Option: C  [ leaves & dried fruits ]

Remark:

Explanation: Coriander (Coriandrum sativum) is a herb belonging to the family Apiaceae. The leaves are used as a fresh herb (commonly known as cilantro), and the dried fruits (often referred to as coriander seeds) are used as a spice. The fruits contain essential oils like linalool and borneol, which give coriander its characteristic aroma and flavor.

Uses:

  • Leaves — used in cooking for flavoring and garnishing dishes.
  • Dried fruits (seeds) — used as a spice, in curry powders, and for medicinal purposes (digestive aid).


Q: When a moving bus suddenly stops, passengers sitting inside leans forward. This is due to

A: Conservation of Mass

B: Inertia of rest

C: Inertia of Motion

D: None of these



Correct Option: C  [ Inertia of Motion ]

Remark:
Inertia of motion is defined as the property of a body to resist any change to its state of uniform motion.


Q: Time during which a job is processed by the computer is:

A: Delay time

B: Real time

C: Down time

D: Execution time



Correct Option: D  [ Execution time ]

Remark:

Explanation: Execution time is the period during which a job or program is actively processed by the computer’s CPU. It refers to the actual time taken to execute instructions, excluding waiting or idle times such as input/output delays or queue time.


Q: ATM means:

A: All Time Money

B: Automatic Teller Machine

C: Automated Teller Machine

D: Any Time Money



Correct Option: C  [ Automated Teller Machine ]

Remark:

ATM stands for Automated Teller Machine. It is an electronic banking device that allows customers to perform financial transactions such as cash withdrawals, deposits, fund transfers, and balance inquiries without the need for a human teller.

  • All Time/Any Time Money: Common informal phrases, not the actual full form.
  • Automatic Teller Machine: Incorrect; the correct term is Automated, not Automatic.


Q: The layer of the atmosphere in which Radio Waves are reflected back is called:

A: Exosphere

B: Ionosphere

C: Troposphere

D: Stratosphere



Correct Option: B  [ Ionosphere ]

Remark:


Q: Parasites which initiate production of antibodies within hosts are termed as

A: Homoparasites

B: Zooparasites

C: Pathogenic parasites

D: Endoparasies



Correct Option: C  [ Pathogenic parasites ]

Remark:

Explanation: Pathogenic parasites are those that invade the host’s body and cause disease. The presence of these harmful organisms stimulates the host’s immune system to produce antibodies that help neutralize or destroy the pathogens. Examples include Plasmodium (causes malaria) and Trypanosoma (causes sleeping sickness).
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