Anatomy of Leaves — NEET Biology MCQs with Solutions
Free NEET Biology Anatomy of Leaves MCQs with step-by-step solutions (6 questions). Part of Anatomy of Flowering Plants. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Anatomy of Leaves · easy · theory
A dorsiventral (dicot) leaf has its mesophyll differentiated into:
A. Palisade parenchyma (upper) and spongy parenchyma (lower) ✓ Correct
B. Sclerenchyma
C. Only spongy parenchyma
D. Only palisade parenchyma
Solution: Dorsiventral leaves have an upper palisade and lower spongy mesophyll; isobilateral leaves have undifferentiated mesophyll.
Q2 — Anatomy of Leaves · easy · theory
The chloroplast-rich, elongated cells packed just below the upper epidermis of a dicot leaf are the:
A. Spongy parenchyma
B. Guard cells
C. Bundle sheath
D. Palisade parenchyma ✓ Correct
Solution: Palisade cells are the main photosynthetic tissue, densely packed with chloroplasts near the upper surface.
Q3 — Anatomy of Leaves · medium · theory
An isobilateral (monocot) leaf differs from a dorsiventral leaf in that:
A. Stomata are equally distributed on both surfaces and mesophyll is not differentiated ✓ Correct
B. It has no stomata
C. It has scattered bundles like a stem
D. Palisade is only on the lower side
Solution: Isobilateral leaves have similar surfaces, stomata on both, and undifferentiated mesophyll; grasses also have bulliform cells.
Q4 — Anatomy of Leaves · medium · theory
The large, empty, thin-walled cells in a grass leaf epidermis that help in rolling/unrolling the leaf are:
A. Palisade cells
B. Companion cells
C. Guard cells
D. Bulliform cells ✓ Correct
Solution: Bulliform (motor) cells lose turgor in drought, rolling the leaf to reduce water loss.
Q5 — Anatomy of Leaves · hard · theory
In C4 plants (e.g. maize), the leaf shows Kranz anatomy, in which the bundle sheath cells are:
A. Large, thick-walled, chloroplast-rich, arranged in a wreath around the vascular bundle ✓ Correct
B. Photosynthetically inactive
C. Devoid of chloroplasts
D. Absent
Solution: Kranz ("wreath") anatomy features prominent, chloroplast-rich bundle sheath cells that concentrate CO₂ for the Calvin cycle.
Q6 — Anatomy of Leaves · hard · theory
Which feature is used to distinguish a leaf transverse section from a young stem section?
A. Presence of a pith
B. Presence of mesophyll with chloroplasts and stomata-bearing epidermis on the (dorsiventral) leaf ✓ Correct
C. Endodermis with Casparian strip
D. Radial vascular bundles
Solution: Leaves show mesophyll (palisade/spongy), abundant chloroplasts and stomata; the bundles are collateral with xylem toward the upper (adaxial) side.