NEET 2022 Phase 1 question paper with solutions

200 questions · 180 min

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Sample questions with solutions

Q1

Which of the following is a correct match for disease and its symptoms?

  • A.

    Arthritis - Inflammed joints

  • B.

    Tetany - High Ca2+Ca^{2+} level causing rapid spasms

  • C.

    Myasthenia gravis - Genetic disorder resulting in weakening and paralysis of skeletal muscle

  • D.

    Muscular dystrophy - An auto immune disorder causing progressive degeneration of skeletal muscle

Answer: A
  1. Check option A.

Arthritis is correctly described as inflammation of joints. So A is correct.

  1. Check option B.

Tetany is actually caused by low Ca++Ca^{++} levels in body fluid (not high levels), leading to rapid muscle spasms. So B is incorrect.

  1. Check option C.

Myasthenia gravis is actually an immune disorder affecting the neuromuscular junction (not a genetic disorder), leading to fatigue, weakening, and paralysis of skeletal muscle. So C is incorrect.

  1. Check option D.

Muscular dystrophy is actually a genetic disorder (not an autoimmune disorder) causing progressive degeneration of skeletal muscle. So D is incorrect.

Hence, the answer is Option A.

Q2

What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid?

  • A.

    Four

  • B.

    Six

  • C.

    Two

  • D.

    Eight

Answer: C

  1. Recall the two phases of glycolysis. Glycolysis consists of an energy investment phase, where ATP is consumed, and an energy payoff phase, where ATP is generated.

  2. Count the ATP consumed. In the investment phase, 2 ATP molecules are used — one to convert glucose to glucose-6-phosphate, and another to convert fructose-6-phosphate to fructose-1,6-bisphosphate.

  3. Count the ATP produced. In the payoff phase, since glucose is split into two 3-carbon fragments, each fragment goes through steps that generate ATP, resulting in a total of 4 ATP molecules produced.

  4. Calculate the net gain. Subtracting the ATP spent from the ATP produced:

4−2=24 - 2 = 2
  1. Conclude. Therefore, converting one glucose molecule into two pyruvic acid molecules results in a net gain of 2 ATP.

Hence, the answer is Option C: Two.

Q3

Identify the incorrect statement related to Pollination:

  • A.

    Pollination by water is quite rare in flowering plants

  • B.

    Pollination by wind is more common amongst abiotic pollination

  • C.

    Flowers produce foul odours to attract flies and beetles to get pollinated

  • D.

    Moths and butterflies are the most dominant pollinating agents among insects

Answer: D

  1. Statement A is correct: water pollination (hydrophily) is indeed a rare mode of pollination, occurring in only a small number of aquatic flowering plants.

  2. Statement B is correct: among the abiotic modes of pollination, wind (anemophily) is far more common than water pollination.

  3. Statement C is correct: some flowers give off foul odours specifically to attract pollinators like flies and beetles, which are drawn to such smells.

  4. Statement D is incorrect: while moths and butterflies do pollinate flowers, the most dominant insect pollinators overall are actually bees, not moths and butterflies.

  5. Hence, the incorrect statement is Option D: Moths and butterflies are the most dominant pollinating agents among insects.

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