Prepare for NEET Biology Anatomy of Flowering Plants with MCQs & PYQs on NEET.GUIDE. Enjoy free practice, previous year questions, and expert insights on plant tissues and structures.
Collenchyma cells often contain chloroplasts. What is the primary function of these chloroplasts in collenchyma tissue?
Photosynthesis, contributing to the plant's energy production.
Storage of starch and other carbohydrates.
Providing structural support to the cell.
Synthesis of pigments for coloration.
Which of the following characteristics is NOT typical of collenchyma cells?
Uniformly thickened cell walls
Presence of pectin in the cell wall
Living at maturity
Provide flexible support
The primary function of collenchyma in plants is to:
Provide flexible support to growing parts
Transport water and nutrients
Store food reserves
Protect against pathogens
Where is collenchyma tissue typically found in plants?
Beneath the epidermis in young stems and petioles
In the center of the root
In the vascular bundles of leaves
Surrounding the xylem and phloem
Which cell wall component contributes significantly to the flexibility of collenchyma cells?
Pectin
Lignin
Suberin
Cutin
What type of thickening is characteristic of collenchyma cell walls?
Uneven thickening, especially at the corners
Uniform thickening all around the cell
Thickening with lignin deposits
No thickening at all
In a dicot leaf exhibiting Kranz anatomy, the mesophyll cells uniquely possess:
Larger chloroplasts with well-developed grana and reduced stroma lamellae.
Smaller chloroplasts with rudimentary grana and abundant stroma lamellae.
Chloroplasts similar in size and structure to bundle sheath chloroplasts.
Chloroplasts lacking both grana and stroma lamellae.
The bulliform cells in a dicot leaf primarily contribute to:
Increased photosynthetic efficiency.
Enhanced gaseous exchange.
Leaf rolling or folding during water stress.
Protection against herbivores.
Which tissue layer is primarily responsible for the radial transport of water and minerals absorbed by the root hairs to the xylem in a dicot root, but is LESS prominent in the dicot leaf vascular bundles?
Pericycle
Endodermis
Cortex
Epidermis
In a typical dorsiventral dicot leaf, the spongy mesophyll is characterized by:
Tightly packed cells maximizing light absorption.
Large, thin-walled cells storing water and nutrients.
Loosely arranged cells with large intercellular spaces facilitating gaseous exchange.
Specialized cells containing crystals and tannins.
