Xylem Marvels: Unraveling the World of Vessels in Plant Water Transport - MCQ

These are MCQS about support and movement chapter. Following Topics are covered

Definition and need of support and movement,turgor,turgor pressure importance, generation of turgor pressure, vascular bundles, collenchyma and sclerenchyma

Xylem Marvels: Unraveling the World of Vessels in Plant Water Transport - MCQs

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What is the primary function of collenchyma cells in plants?
- A) Water transport
- B) Photosynthesis
- C) Flexibility and support
- D) Nutrient storage
- Answer: C) Flexibility and support
- Explanation: Collenchyma cells provide flexibility and support to growing plant parts such as stems, leaves, and petioles.
Where is collenchyma tissue predominantly found in plants?
- A) Mature stems
- B) Root tips
- C) Young stems, leaves, and petioles
- D) Flower petals
- Answer: C) Young stems, leaves, and petioles
- Explanation: Collenchyma tissue is commonly found in the young, actively growing parts of the plant.
Which component is responsible for the irregular thickening of collenchyma cell walls?
- A) Lignin
- B) Cellulose
- C) Pectin
- D) Starch
- Answer: C) Pectin
- Explanation: Collenchyma cell walls are irregularly thickened due to deposits of cellulose and pectin.
What is the primary function of sclerenchyma tissue in plants?
- A) Flexibility
- B) Water transport
- C) Mechanical support
- D) Photosynthesis
- Answer: C) Mechanical support
- Explanation: Sclerenchyma tissue provides mechanical support and protection for mature plant tissues.
Where are sclerenchyma fibers (tracheids) mainly located in a plant?
- A) Inner part of stems
- B) Outer part of stems
- C) Root tips
- D) Flower petals
- Answer: B) Outer part of stems
- Explanation: Sclerenchyma fibers, or tracheids, are often found in the outer part of stems, providing tensile strength.
What is the primary shape of sclereids in sclerenchyma tissue?
- A) Elongated
- B) Round or variable
- C) Tubular
- D) Flattened
- Answer: B) Round or variable
- Explanation: Sclereids have varied shapes and are found in seed coats, nutshells, and other protective structures.
Which component is abundant in the thickened cell walls of sclerenchyma cells?
- A) Chlorophyll
- B) Lignin
- C) Starch
- D) Cellulose
- Answer: B) Lignin
- Explanation: The thickened cell walls of sclerenchyma cells contain a high amount of lignin, making them rigid.
Are sclerenchyma cells typically alive or dead at maturity?
- A) Alive
- B) Dead
- C) Depends on the plant species
- D) Both alive and dead
- Answer: B) Dead
- Explanation: Sclerenchyma cells are usually dead at maturity, with their primary function being structural support.
Which type of tissue is responsible for secondary growth in plant stems?
- A) Collenchyma
- B) Xylem
- C) Phloem
- D) Cambium
- Answer: D) Cambium
- Explanation: Cambium, found between xylem and phloem, is responsible for secondary growth in stems.
What is the primary role of vascular bundles in plants?

A) Mechanical support
B) Photosynthesis
C) Water and nutrient transport
D) Reproduction
Answer: C) Water and nutrient transport
Explanation: Vascular bundles transport water, nutrients, and sugars in plants.

What is the primary function of collenchyma tissue in plants?
- A) Water transport
- B) Mechanical support
- C) Nutrient synthesis
- D) Gas exchange
- Answer: B) Mechanical support
- Explanation: Collenchyma tissue provides mechanical support to growing plant parts.
In which plant organs is sclerenchyma tissue commonly found?
- A) Young leaves
- B) Mature stems
- C) Root tips
- D) Flower petals
- Answer: B) mature stems
- Explanation: Sclerenchyma tissue is often found in mature stems for structural support.
Which component is responsible for the rigidity of sclerenchyma cell walls?
- A) Pectin
- B) Cellulose
- C) Lignin
- D) Starch
- Answer: C) Lignin
- Explanation: Lignin contributes to the rigidity and durability of sclerenchyma cell walls.
Where are sclerenchyma fibers (tracheids) typically located in a plant?
- A) Inner part of stems
- B) Outer part of stems
- C) Root tips
- D) Leaf veins
- Answer: B) Outer part of stems
- Explanation: Sclerenchyma fibers, or tracheids, are commonly found in the outer part of stems.
Which type of tissue provides flexibility and support for actively growing plant parts?
- A) Xylem
- B) Phloem
- C) Collenchyma
- D) Sclerenchyma
- Answer: C) Collenchyma
- Explanation: Collenchyma tissue provides flexibility and support in young, growing plants.
Which plant tissue is responsible for the primary growth in length of stems and roots?
- A) Xylem
- B) Phloem
- C) Meristem
- D) Sclerenchyma
- Answer: C) Meristem
- Explanation: Meristematic tissues, specifically apical meristems, are responsible for primary growth in length.
What is the primary function of xylem tissue in vascular bundles?
- A) Nutrient transport
- B) Water transport
- C) Photosynthesis
- D) Mechanical support
- Answer: B) Water transport
- Explanation: Xylem tissue is specialized for the transport of water and minerals in plants.
Where is phloem tissue primarily located in a vascular bundle?
- A) On the outer side
- B) On the inner side
- C) Surrounding the xylem
- D) In the center
- Answer: (C) Surrounding the xylem
- Explanation: Phloem tissue surrounds the xylem in the center of a vascular bundle.
What is the role of cambium in secondary growth?
- A) Water transport
- B) Energy storage
- C) Nutrient synthesis
- D) Formation of new vascular tissues
- Answer: D) Formation of new vascular tissues
- Explanation: Cambium is responsible for the production of secondary xylem and phloem, contributing to the plant's width.
Which of the following tissues is responsible for the transport of sugars produced during photosynthesis?

A) Xylem
B) Phloem
C) Collenchyma
D) Epidermis
Answer: B) Phloem
Explanation: Phloem is specialized for the transport of sugars (sap) produced in photosynthetic tissues to other parts of the plant.