The process by which a cell engulfs a solid particle is termed: MCQ with Answer and Explanation

The process by which a cell engulfs a solid particle is termed:
A. Osmosis
B. Phagocytosis
C. Exocytosis
D. Pinocytosis
Answer: Option B
Solution (By JKSSB Mock Tests)
Phagocytosis ('cell eating') is a type of endocytosis where the cell membrane extends pseudopodia around a solid particle (e.g., bacterium) and engulfs it into a phagosome, which later fuses with a lysosome for digestion. Pinocytosis is 'cell drinking' of fluids. Exocytosis is secretion. Osmosis is water movement across a membrane.

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Practice More Biology Questions

Question #1
Which part of the human eye is responsible for color vision?
A. Cornea
B. Lens
C. Rods
D. Cones

Correct Answer: Option D


Explanation:
Cones are photoreceptor cells in the retina responsible for photopic (daylight) vision and color perception. There are three types of cones sensitive to blue, green, and red wavelengths. Rods are responsible for scotopic (dim light) vision and do not detect color. The cornea and lens focus light onto the retina.

This question belongs to: Science Biology
Question #2
The 'Joint Forest Management' (JFM) concept in India was introduced primarily to:
A. Nationalize all forest lands
B. Convert forests into commercial plantations
C. Involve local communities in the management and conservation of degraded forest lands
D. Ban all human activities in forests

Correct Answer: Option C


Explanation:
Joint Forest Management (JFM) is a concept introduced in India (first in West Bengal in 1988) to address the problem of forest degradation. It involves establishing a partnership between the state forest departments and local communities living near the forests. The communities are given the responsibility to protect and manage the degraded forest lands in exchange for a share in the produce (like non-timber forest products, timber) and employment opportunities, fostering a sense of ownership and sustainable conservation.

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Question #3
In plant physiology, the 'Osmotic pressure' is the pressure that must be applied to a solution to prevent the inward flow of water across a semipermeable membrane. It is directly proportional to the:
A. Size of the solute molecules
B. Concentration of solute particles
C. Volume of the solution
D. Temperature only

Correct Answer: Option B


Explanation:
Osmotic pressure (OP) is a colligative property of a solution, meaning it depends on the number of solute particles dissolved in a given volume of solvent, not on the nature or size of the particles. It is defined as the hydrostatic pressure that must be applied to a solution to prevent the net flow of water (osmosis) into the solution across a semipermeable membrane. According to the van't Hoff equation, osmotic pressure is directly proportional to the molar concentration of solute particles and the absolute temperature. The more concentrated the solution, the higher its osmotic pressure.

This question belongs to: Science Biology