50 Most Important NEET PYQs of Chapter 11: Transport in Plants – Part 1 (Q1–25)

-

 πŸ§ͺ 50 Most Important NEET PYQs of Chapter 11: Transport in Plants – Part 1 (Q1–25)

By neetpyqall

Welcome to Part 1 of NEET Previous Year Questions from Chapter 11: Transport in Plants. These 25 questions have been carefully selected based on frequency and relevance in NEET exams, with detailed solutions to help you build strong conceptual understanding.

1. Water potential is equal to:

A) Osmotic potential + Pressure potential
B) Pressure potential – Osmotic potential
C) Solute potential + Turgor pressure
D) Osmotic pressure – Pressure potential
✅ Answer: A) Osmotic potential + Pressure potential
Explanation: Water potential (Ξ¨) is calculated as Ξ¨ = Ξ¨s (solute potential) + Ξ¨p (pressure potential). It's a key concept in understanding water movement.

2. The direction and rate of osmosis depend on:

A) Temperature
B) Solute concentration
C) Water potential gradient
D) Pressure
✅ Answer: C) Water potential gradient
Explanation: Osmosis occurs from a region of higher water potential to a region of lower water potential.

3. A plant cell placed in a hypertonic solution will:

A) Become turgid
B) Undergo plasmolysis
C) Not show any change
D) Lyse
✅ Answer: B) Undergo plasmolysis
Explanation: In hypertonic solutions, water moves out of the cell, causing the cytoplasm to shrink away from the cell wall.

4. Imbibition is:

A) Absorption of water by dead cells
B) Uptake of water against concentration gradient
C) Uptake of water by living cells
D) None of the above
✅ Answer: A) Absorption of water by dead cells
Explanation: Imbibition is the process of adsorption of water by solids or colloids causing an increase in volume, especially in seeds.

5. Which condition favors the fastest rate of transpiration?

A) High humidity, still air
B) High temperature, low humidity
C) Low temperature, high humidity
D) Low temperature, still air
✅ Answer: B) High temperature, low humidity
Explanation: Transpiration increases with temperature and decreases with humidity.

6. Transpiration pull is created due to:

A) Root pressure
B) Active transport
C) Cohesion and adhesion of water molecules
D) Pressure potential
✅ Answer: C) Cohesion and adhesion of water molecules
Explanation: The cohesion of water molecules helps in the upward movement of water through xylem.

7. Guttation is the loss of:

A) Water vapour
B) Liquid water
C) Ions
D) None of these
✅ Answer: B) Liquid water
Explanation: Guttation is the exudation of liquid water from hydathodes on leaf margins.

8. In a root, the pathway of water from soil to xylem is:

A) Apoplast → Symplast → Xylem
B) Symplast → Apoplast → Xylem
C) Apoplast only
D) Symplast only
✅ Answer: A) Apoplast → Symplast → Xylem
Explanation: Water first travels through the cell wall (apoplast) and then through cytoplasm (symplast) before reaching the xylem.

9. The Casparian strip is found in:

A) Epidermis
B) Cortex
C) Endodermis
D) Pericycle
✅ Answer: C) Endodermis
Explanation: The Casparian strip is a waxy band in endodermal cells that blocks the passive flow of materials into the stele.

10. Root pressure develops due to:

A) Transpiration
B) Active absorption
C) Guttation
D) Passive absorption
✅ Answer: B) Active absorption
Explanation: Root pressure is generated due to active transport of ions into the xylem.

11. Xylem is responsible for:

A) Transport of water
B) Transport of food
C) Transport of hormones
D) None of the above
✅ Answer: A) Transport of water
Explanation: Xylem conducts water and minerals from roots to shoots.

12. The transpiration-cohesion theory explains:

A) Movement of food
B) Movement of water
C) Absorption of minerals
D) Opening of stomata
✅ Answer: B) Movement of water
Explanation: This theory explains how water moves against gravity due to transpiration pull and cohesive properties of water.

13. Phloem transports:

A) Water
B) Hormones
C) Food
D) Gases
✅ Answer: C) Food
Explanation: Phloem transports organic substances like sucrose from source to sink.

14. Which one of the following is a passive process?

A) Diffusion
B) Active transport
C) Endocytosis
D) Exocytosis
✅ Answer: A) Diffusion
Explanation: Passive transport requires no energy, diffusion is the best example.

15. Which process helps in absorption of minerals against the concentration gradient?

A) Diffusion
B) Osmosis
C) Active transport
D) Facilitated diffusion
✅ Answer: C) Active transport
Explanation: Active transport uses energy to absorb minerals against the concentration gradient.

16. Water potential is always:

A) Positive
B) Negative
C) Zero
D) Equal to osmotic potential
✅ Answer: B) Negative
Explanation: Pure water has zero water potential; addition of solutes makes it negative.

17. Which part of the plant is most active in absorption of water?

A) Root cap
B) Elongation zone
C) Root hairs
D) Meristematic zone
✅ Answer: C) Root hairs
Explanation: Root hairs have a large surface area and are in close contact with soil particles.

18. Symplastic movement occurs through:

A) Intercellular spaces
B) Plasmodesmata
C) Xylem
D) Apoplast
✅ Answer: B) Plasmodesmata
Explanation: Symplastic pathway involves cytoplasmic connection between cells via plasmodesmata.

19. Osmosis is:

A) Diffusion of solute
B) Diffusion of water through semi-permeable membrane
C) Active transport of ions
D) Bulk flow
✅ Answer: B) Diffusion of water through semi-permeable membrane
Explanation: Osmosis is a passive process involving movement of water.

20. Which one helps in upward movement of water through xylem?

A) Transpiration pull
B) Root pressure
C) Capillary action
D) All of these
✅ Answer: D) All of these
Explanation: All three mechanisms play roles, but transpiration pull is the most dominant.

21. Which of these is NOT a feature of xylem?

A) Dead cells
B) Unidirectional flow
C) Transports food
D) Contains tracheids
✅ Answer: C) Transports food
Explanation: Xylem is for water and mineral conduction, not food.

22. In plants, ascent of sap takes place mainly through:

A) Vessels
B) Phloem
C) Sieve tubes
D) Tracheids
✅ Answer: A) Vessels
Explanation: Vessels are wide, efficient conduits in angiosperms for water movement.

23. The pressure flow hypothesis is related to:

A) Xylem transport
B) Transpiration
C) Phloem transport
D) Root pressure
✅ Answer: C) Phloem transport
Explanation: This hypothesis explains mass flow of solutes through phloem.

24. The loss of water in the form of droplets from leaf margin is called:

A) Transpiration
B) Guttation
C) Evaporation
D) Bleeding
✅ Answer: B) Guttation
Explanation: Guttation occurs through hydathodes due to root pressure.

25. Cohesion-tension theory of water movement was proposed by:

A) Dixon and Jolly
B) MΓΌnch
C) Priestley
D) Van Helmont
✅ Answer: A) Dixon and Jolly
Explanation: They explained upward water movement via cohesion of water molecules and transpiration pull.

✅ Stay tuned for Part 2 (Q26–50) of this chapter where we’ll explore more high-yield NEET questions with full explanations!

πŸ“š For more such NEET Biology content:
πŸ”— neetpyqall.blogspot.com
πŸ”— biologyatease1.blogspot.com


Comments

Post a Comment

Popular posts from this blog

50 Most Important NEET PYQs of Chapter "Living World" with Detailed Solutions

-
 Certainly! Below is a complete set of 50 Most Important NEET PYQs of Chapter "Living World" with detailed solutions. The blog concludes with a call to follow @neetpyqall for more updates. 50 Most Important NEET PYQs of Chapter "Living World" with Detailed Solutions Welcome to a comprehensive guide to the Living World chapter from your NEET Biology syllabus. This chapter forms the foundation for understanding biological classification, characteristics of life, and the diversity of organisms. Here, we cover 50 crucial previous year questions (PYQs) from NEET, with detailed answers and explanations. 1. Question : Which of the following is NOT a characteristic feature of living organisms? A) Growth B) Ability to reproduce C) Inability to respond to stimuli D) Metabolism Answer : C) Inability to respond to stimuli Explanation : Living organisms respond to external stimuli, which is a fundamental characteristic of life. The other options—growth...
Read more

NEET PYQs – Chapter 2: Biological Classification (Top 50 Questions with Detailed Solutions)

-
 Got it! Here's your complete blog-style post with 50 most important NEET previous year questions from Chapter 2 – Biological Classification , including answers and detailed solutions. 🧬 NEET PYQs – Chapter 2: Biological Classification (Top 50 Questions with Detailed Solutions) Perfect for NEET 2025 aspirants! Dive into these handpicked questions from previous years to master the concepts of this chapter. 1. Five Kingdom Classification was Proposed by: A) Carolus Linnaeus B) R.H. Whittaker C) Aristotle D) Ernst Haeckel ✅ Answer: B) R.H. Whittaker Explanation: In 1969, R.H. Whittaker introduced the five kingdom classification: Monera, Protista, Fungi, Plantae, and Animalia. 2. Kingdom Monera Consists of: A) Multicellular organisms B) Unicellular eukaryotes C) Unicellular prokaryotes D) Multicellular eukaryotes ✅ Answer: C) Unicellular prokaryotes Explanation: Monera includes bacteria and blue-green algae, which are unicellular and prokaryot...
Read more

50 Most Important NEET PYQs of Chapter 13: Photosynthesis in Higher Plants – Part 1 (Q1–25) | By neetpyqall

-
🌿 50 Most Important NEET PYQs of Chapter 13: Photosynthesis in Higher Plants – Part 1 (Q1–25) | By neetpyqall Get ready to master one of the most frequently asked and high-weightage chapters of NEET – Photosynthesis in Higher Plants . Below are 25 highly important Previous Year Questions (PYQs) with detailed explanations to help you gain conceptual clarity and improve accuracy in the exam. 1. Which of the following is a correct statement regarding photosynthesis? A) Oxygen is consumed B) CO₂ is released C) It is an exothermic reaction D) It is an endothermic reaction ✅ Answer: D) It is an endothermic reaction Explanation: Photosynthesis requires energy (sunlight) to convert CO₂ and H₂O into glucose, making it an endothermic process. 2. In which part of the chloroplast does the light reaction occur? A) Stroma B) Outer membrane C) Grana (thylakoid membranes) D) Inner membrane ✅ Answer: C) Grana (thylakoid membranes) Explanation: Light-dependent reactions occur in th...
Read more