NEET 2025 MCQ with Answer Explanation : “Transport in Plants”.

Here below some basic MCQ’s about “Transport in Plants” with answer which is explained in details. Lets check one by one which is given in below.

Question 1:
Which of the following is primarily responsible for the transport of water and minerals in plants?

A) Phloem
B) Xylem
C) Cortex
D) Pith

Answer: B) Xylem

Explanation: Xylem is the tissue responsible for the conduction of water and dissolved minerals from the roots to other parts of the plant. It consists of vessels and tracheids that facilitate this transport. Phloem, on the other hand, primarily transports organic nutrients (especially sugars) produced through photosynthesis.

Question 2:
What is the main mechanism by which water moves from the roots to the leaves in plants?

A) Active transport
B) Diffusion
C) Cohesion and adhesion
D) Osmosis

Answer: C) Cohesion and adhesion

Explanation: Water movement in plants occurs primarily through cohesion (water molecules sticking to each other) and adhesion (water molecules sticking to the walls of the xylem vessels). This combination creates a continuous column of water that can be pulled upward through transpiration.

Question 3:
Which part of the plant is responsible for the majority of photosynthesis and consequently the production of food transported by phloem?

A) Roots
B) Stems
C) Leaves
D) Flowers

Answer: C) Leaves

Explanation: Leaves contain chloroplasts where photosynthesis occurs, producing sugars that are then transported through the phloem to other parts of the plant. The broad surface area of leaves maximizes light absorption for this process.

Question 4:
What is the term for the movement of water vapor from the inside of a leaf to the atmosphere?

A) Transpiration
B) Respiration
C) Evaporation
D) Photosynthesis

Answer: A) Transpiration

Explanation: Transpiration is the process by which water vapor exits the leaf through stomata. This loss of water creates a negative pressure that helps pull more water up from the roots through the xylem.

Question 5:
Which structure regulates the opening and closing of stomata?

A) Parenchyma
B) Sclerenchyma
C) Guard cells
D) Mesophyll

Answer: C) Guard cells

Explanation: Guard cells surround each stoma (the pore on the leaf surface) and control its opening and closing. This regulation is crucial for balancing water loss through transpiration with gas exchange for photosynthesis.

Question 6:
What drives the movement of water through the xylem?

A) Root pressure
B) Capillary action
C) Transpiration pull
D) Active transport

Answer: C) Transpiration pull

Explanation: Transpiration pull is the primary force driving water movement through the xylem. As water evaporates from the leaves, it creates negative pressure that pulls more water up from the roots.

Question 7:
Which of the following statements about phloem is true?

A) Phloem transports water only.
B) Phloem is made up of vessel elements.
C) Phloem transports organic nutrients.
D) Phloem does not have living cells.

Answer: C) Phloem transports organic nutrients.

Explanation: Phloem is responsible for the transport of organic compounds, particularly sugars produced during photosynthesis. It contains living cells, such as sieve elements and companion cells.

Question 8:
The phenomenon of “guttation” occurs due to:

A) High transpiration rates
B) Root pressure
C) Low humidity
D) Stomatal closure

Answer: B) Root pressure

Explanation: Guttation is the process where water droplets are expelled from the edges of leaves, primarily due to root pressure. This usually occurs at night when transpiration is low.

Question 9:
In which part of the plant does most absorption of water and minerals occur?

A) Stems
B) Leaves
C) Roots
D) Flowers

Answer: C) Roots

Explanation: Roots are the primary organs for the absorption of water and minerals from the soil. Root hairs increase the surface area for absorption.

Question 10:
What is the role of the Casparian strip in plant roots?

A) Water storage
B) Nutrient absorption
C) Regulation of water and solute movement
D) Photosynthesis

Answer: C) Regulation of water and solute movement