NEET Prep

NEET 2024

156 questions from the 2024 paper. A sample is shown below with full explanations.

Biomolecules (Biology) 6Biotechnology — Principles and Processes 6Molecular Basis of Inheritance 6Principles of Inheritance and Variation 6Biodiversity and Conservation 5Human Health and Disease 5Animal Kingdom 4Cell Cycle and Cell Division 4Cell — The Unit of Life 4Evolution 4Some Basic Concepts of Chemistry 3Chemical Bonding and Molecular Structure 3Chemical Coordination and Integration 3Chemical Thermodynamics 3Coordination Compounds 3d- and f-Block Elements 3Equilibrium 3Human Reproduction 3Magnetic Effects of Current and Magnetism 3Morphology of Flowering Plants 3Optics 3Photosynthesis in Higher Plants 3Plant Growth and Development 3Properties of Bulk Matter 3Structural Organisation in Animals 3Anatomy of Flowering Plants 2Atoms and Nuclei 2Biological Classification 2Biotechnology and its Applications 2Body Fluids and Circulation 2Breathing and Exchange of Gases 2Chemical Kinetics 2Current Electricity 2Electrochemistry 2Electromagnetic Waves 2Excretory Products and their Elimination 2Hydrocarbons 2Neural Control and Coordination 2Organisms and Populations 2p-Block Elements 2Classification of Elements and Periodicity 2Principles of Practical Chemistry 2Reproductive Health 2Respiration in Plants 2Solutions 2Work 2Alcohols 1Aldehydes 1Amines 1Biomolecules (Chemistry) 1Dual Nature of Matter and Radiation 1Electromagnetic Induction and AC 1Electrostatics 1Gravitation 1Kinematics 1Locomotion and Movement 1Microbes in Human Welfare 1Organic Chemistry — Basic Principles 1Oscillations and Waves 1Plant Kingdom 1Redox Reactions 1System of Particles and Rotational Motion 1Sexual Reproduction in Flowering Plants 1Structure of Atom 1Units and Measurements 1
Molecular Basis of Inheritance2024easy

Q1.A transcription unit in DNA is defined primarily by the three regions in DNA and these are, with respect to upstream and downstream end,

  • AStructural gene, Transposons, Operator gene
  • BInducer, Repressor, Structural gene
  • CPromotor, Structural gene, TerminatorAnswer
  • DRepressor, Operator gene, Structural gene

Explanation

A transcription unit is defined by three regions: a promoter at the upstream 5′ end where RNA polymerase binds, the structural gene that is actually transcribed, and a terminator at the downstream 3′ end that stops transcription. Operators, repressors and inducers belong to the regulation of the operon rather than to the definition of the transcription unit itself.

Source: NEET 2024 (5 May), Code R3, Q101

Sexual Reproduction in Flowering Plants2024hard

Q2.Identify the set of correct statements and choose the correct answer from the options given below.

  • A. The flowers of Vallisneria are colourful and produce nectar.
  • B. The flowers of water lily are not pollinated by water.
  • C. In most of water-pollinated species, the pollen grains are protected from wetting.
  • D. Pollen grains of some hydrophytes are long and ribbon like.
  • E. In some hydrophytes, the pollen grains are carried passively inside water.
  • AA, B, C and D only
  • BA, C, D and E only
  • CB, C, D and E onlyAnswer
  • DC, D and E only

Explanation

Vallisneria flowers are small and colourless and offer no nectar, since they are carried on the water surface rather than advertised to animals — so A is false. Water lily, despite being aquatic, is insect pollinated, making B true. In water pollinated species the pollen has a mucilaginous covering that keeps it dry, some pollen is long and ribbon like as in Zostera, and some is carried passively in the water. Hence B, C, D and E.

Source: NEET 2024 (5 May), Code R3, Q102

Biomolecules (Biology)2024easy

Q3.Lecithin, a small molecular weight organic compound found in living tissues, is an example of

  • APhospholipidsAnswer
  • BGlycerides
  • CCarbohydrates
  • DAmino acids

Explanation

Lecithin is phosphatidylcholine — a glycerol backbone carrying two fatty acid chains and a phosphate group linked to choline. The presence of that phosphate head is what makes it a phospholipid rather than a simple glyceride, and it is the amphipathic character of such molecules that lets them form the lipid bilayer of biological membranes.

Source: NEET 2024 (5 May), Code R3, 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.