2021 source guide · Biology

NEET 2021 Biology Questions

Use this page to connect the official 2021 paper with current Biology practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 3486 verified questions →Check official NTA archive ↗

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 3/5

The vascular bundles of a typical dicot stem, such as sunflower, are described as 'open'. What does this terminology actually indicate?

A. Each bundle is encircled by a bundle sheath containing air spaces
B. Xylem and phloem lie on opposite radii, separated by parenchyma
C. A strip of cambium is present between xylem and phloem and can produce secondary tissues
D. The phloem lacks companion cells, keeping the bundle open to the cortex

Example 2 · difficulty 2/5

On the adaxial epidermis of a grass leaf there are large, colourless, empty-looking cells that cause the leaf to curl under water stress. These cells are:

A. Guard cells of sunken stomata
B. Bulliform (motor) cells
C. Subsidiary cells of the stomatal apparatus
D. Silica-depositing idioblasts

Example 3 · difficulty 4/5

During secondary growth in a dicot stem, the interfascicular cambium that links up with the intrafascicular cambium to complete the cambial ring arises from:

A. Cells of the medullary rays situated between adjacent vascular bundles
B. Dedifferentiated cortical parenchyma just below the epidermis
C. Residual procambial cells retained within the primary phloem
D. The pericycle, which becomes meristematic after primary growth ceases

The evidence-first practice loop

1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.

Canonical chapter practice

The Living World →Biological Classification →Plant Kingdom →Animal Kingdom →Morphology of Flowering Plants →Anatomy of Flowering Plants →Structural Organisation in Animals →Cell: The Unit of Life →Biomolecules →Cell Cycle and Cell Division →Photosynthesis in Higher Plants →Respiration in Plants →Plant Growth and Development →Breathing and Exchange of Gases →Body Fluids and Circulation →Excretory Products and their Elimination →Locomotion and Movement →Neural Control and Coordination →Chemical Coordination and Integration →Sexual Reproduction in Flowering Plants →Human Reproduction →Reproductive Health →Principles of Inheritance and Variation →Molecular Basis of Inheritance →Evolution →Human Health and Disease →Microbes in Human Welfare →Biotechnology: Principles and Processes →Biotechnology and its Applications →Organisms and Populations →Ecosystem →Biodiversity and Conservation →

Frequently asked questions

Are these official NEET 2021 Biology PYQs?

No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.

How should I use the NEET 2021 paper?

Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.