NEET Prep

NEET 2021

139 questions from the 2021 paper. A sample is shown below with full explanations.

Molecular Basis of Inheritance 8Biotechnology — Principles and Processes 6Cell Cycle and Cell Division 5Plant Kingdom 5Animal Kingdom 4Biomolecules (Biology) 4Biotechnology and its Applications 4Organisms and Populations 4Structural Organisation in Animals 4Breathing and Exchange of Gases 3Cell — The Unit of Life 3Chemical Bonding and Molecular Structure 3Ecosystem 3Electromagnetic Induction and AC 3Electrostatics 3Human Reproduction 3Optics 3p-Block Elements 3Plant Growth and Development 3Principles of Inheritance and Variation 3Reproductive Health 3Sexual Reproduction in Flowering Plants 3Anatomy of Flowering Plants 2Body Fluids and Circulation 2Coordination Compounds 2Current Electricity 2d- and f-Block Elements 2Electrochemistry 2Electronic Devices 2Evolution 2Locomotion and Movement 2Oscillations and Waves 2Photosynthesis in Higher Plants 2System of Particles and Rotational Motion 2Solutions 2Units and Measurements 2Alcohols 1Aldehydes 1Atoms and Nuclei 1Some Basic Concepts of Chemistry 1Biological Classification 1Biomolecules (Chemistry) 1Chemical Coordination and Integration 1Chemical Kinetics 1Chemical Thermodynamics 1Dual Nature of Matter and Radiation 1Electromagnetic Waves 1Equilibrium 1Experimental Skills 1Gravitation 1Haloalkanes and Haloarenes 1Hydrocarbons 1Kinematics 1Kinetic Theory of Gases 1Laws of Motion 1Microbes in Human Welfare 1Morphology of Flowering Plants 1Organic Chemistry — Basic Principles 1Classification of Elements and Periodicity 1Properties of Bulk Matter 1Redox Reactions 1Respiration in Plants 1Structure of Atom 1Work 1
Plant Kingdom2021medium

Q1.Which of the following plants is monoecious?

  • ACarica papaya
  • BCharaAnswer
  • CMarchantia polymorpha
  • DCycas circinalis

Explanation

Chara bears both male (antheridia) and female (oogonia) sex organs on the same thallus, which makes it monoecious. Carica papaya, Marchantia polymorpha and Cycas circinalis are all dioecious, carrying male and female reproductive structures on separate plants.

Source: NEET 2021 (12 Sept), Code M1, Q101

Sexual Reproduction in Flowering Plants2021medium

Q2.A typical angiosperm embryo sac at maturity is

  • A8-nucleate and 7-celledAnswer
  • B7-nucleate and 8-celled
  • C7-nucleate and 7-celled
  • D8-nucleate and 8-celled

Explanation

Three rounds of free nuclear mitosis in the functional megaspore give eight nuclei. Cell walls then organise these into seven cells: three antipodals, two synergids, one egg cell and one large central cell that retains two polar nuclei. The central cell holding two nuclei is why the count is 8-nucleate but only 7-celled.

Source: NEET 2021 (12 Sept), Code M1, Q102

Plant Kingdom2021easy

Q3.Gemmae are present in

  • AMosses
  • BPteridophytes
  • CSome Gymnosperms
  • DSome LiverwortsAnswer

Explanation

Gemmae are green, multicellular asexual buds borne in cup-like gemma cups on the thallus of some liverworts, such as Marchantia. They detach and grow into new plants. Mosses, pteridophytes and gymnosperms do not produce gemma cups.

Source: NEET 2021 (12 Sept), Code M1, Q103

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Questions are reformatted from NEET previous year papers with original explanations and topic tagging. NEET Prep is not affiliated with the NEET examining body.