NEET Prep

NEET 2023

254 questions from the 2023 paper. A sample is shown below with full explanations.

Molecular Basis of Inheritance 11Principles of Inheritance and Variation 9Biotechnology — Principles and Processes 8Cell Cycle and Cell Division 8Anatomy of Flowering Plants 6Atoms and Nuclei 6Current Electricity 6Electromagnetic Induction and AC 6Morphology of Flowering Plants 6Photosynthesis in Higher Plants 6Plant Growth and Development 6Plant Kingdom 6Properties of Bulk Matter 6Sexual Reproduction in Flowering Plants 6Biomolecules (Biology) 5Chemical Bonding and Molecular Structure 5d- and f-Block Elements 5Ecosystem 5Kinematics 5Optics 5Organisms and Populations 5p-Block Elements 5Respiration in Plants 5Biodiversity and Conservation 4Electrostatics 4Classification of Elements and Periodicity 4Reproductive Health 4Structure of Atom 4Units and Measurements 4Cell — The Unit of Life 3Chemical Coordination and Integration 3Chemical Kinetics 3Chemical Thermodynamics 3Coordination Compounds 3Dual Nature of Matter and Radiation 3Electrochemistry 3Electronic Devices 3Equilibrium 3Human Health and Disease 3Laws of Motion 3Magnetic Effects of Current and Magnetism 3Organic Chemistry — Basic Principles 3System of Particles and Rotational Motion 3Structural Organisation in Animals 3Work 3Alcohols 2Animal Kingdom 2Biomolecules (Chemistry) 2Body Fluids and Circulation 2Breathing and Exchange of Gases 2Electromagnetic Waves 2Excretory Products and their Elimination 2Gravitation 2Haloalkanes and Haloarenes 2Human Reproduction 2Kinetic Theory of Gases 2Neural Control and Coordination 2Oscillations and Waves 2Redox Reactions 2Solutions 2The Living World 2Aldehydes 1Amines 1Some Basic Concepts of Chemistry 1Biotechnology and its Applications 1Evolution 1Hydrocarbons 1Locomotion and Movement 1Principles of Practical Chemistry 1Thermodynamics 1
Photosynthesis in Higher Plants2023medium

Q1.Match List-I with List-II and choose the correct answer from the options given below.

  • List-I (Pigment):
  • A. Chlorophyll a
  • B. Chlorophyll b
  • C. Xanthophyll
  • D. Carotenoid
  • List-II (Colour):
  • I. Yellow to yellow orange
  • II. Yellow green
  • III. Blue green
  • IV. Yellow
  • AA-II, B-III, C-I, D-IV
  • BA-IV, B-III, C-II, D-I
  • CA-III, B-II, C-IV, D-IAnswer
  • DA-III, B-I, C-IV, D-II

Explanation

The four photosynthetic pigments of the chloroplast are separated by their absorption and therefore by the colour they appear. Chlorophyll a is blue green, chlorophyll b is yellow green, xanthophylls are yellow and carotenoids run from yellow to yellow orange. That gives A-III, B-II, C-IV, D-I.

Source: NEET 2023 (6 June), Code A1, Q101

Biotechnology — Principles and Processes2023medium

Q2.Ligation of foreign DNA at which of the following sites will result in loss of tetracycline resistance of pBR322?

  • AEcoR I
  • BBamH IAnswer
  • CPst I
  • DPvu I

Explanation

pBR322 carries two selectable markers, ampR and tetR. The BamH I and Sal I recognition sites lie inside the tetracycline resistance gene, so inserting foreign DNA there interrupts it and the recombinant becomes tetracycline sensitive. Pst I and Pvu I sit inside ampR instead, and EcoR I lies outside both genes.

Source: NEET 2023 (6 June), Code A1, Q103

Plant Kingdom2023easy

Q3.Which classes of algae possess pigment fucoxanthin and pigment phycoerythrin, respectively?

  • AChlorophyceae and Rhodophyceae
  • BRhodophyceae and Phaeophyceae
  • CPhaeophyceae and Chlorophyceae
  • DPhaeophyceae and RhodophyceaeAnswer

Explanation

Fucoxanthin is the brown accessory xanthophyll that masks chlorophyll in the brown algae, Phaeophyceae. Phycoerythrin is the red phycobilin protein of the red algae, Rhodophyceae. The order asked for is fucoxanthin first, so the answer is Phaeophyceae and Rhodophyceae.

Source: NEET 2023 (6 June), Code A1, Q104

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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.