Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

In guava, cucurbits flowers are

  • hypogynous

  • epigynous

  • perigynous

  • Both (a) and (c)


2.

In floral formula (K) denotes

  • polysepalous

  • gamosepalous

  • polypetalous

  • gamopetalous


3.

Which of the following is photophosphorylation?

  • Production of ATP from ADP

  • Production of NADP

  • Synthesis of ADP from ATP

  • Production of PGA


4.

What is the structural element of cell wall?

  • Matrix

  • Microtubules

  • Microfibrils

  • Arabinogalactans


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5.

Which chemical is used for induction of polyploidy?

  • Cytokinin

  • Nitrous acid

  • Colchicine

  • IAA


6.

In which book, Bentham and Hooker proposed their classification?

  • Genera Plantarum

  • Species Plantarum

  • Historia Plantarum

  • Historia Naturae


7.

When does a plant wilt?

  • When phloem is blocked

  • When xylem is blocked

  • Pith is removed

  • A few leaves are removed


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8.

Which of the following sequence is a correct one for meiotic cell cycle?

  • GS G M G1

  • G1 G2 G2

  • G2 G1 G2

  • G1 G2 S


A.

GS G M G1

The basic parts of cell cycle are interphase and M-phase or dividing phase. The interphase is metabolically the most active stage and divided into G1, S and G2 phases. The correct sequence of phases in cell cycle is

G1 G2 G1


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9.

In the following pairs, where do you get lignin in both the element?

  • Tracheid and collenchyma

  • Sclerenchyma and sieve tube

  • Sclerenchyma and trachea

  • Parenchyma and endodermis


10.

From which of the following, photosynthetic autotrophs receive their energy?

  • Heat

  • Inorganic chemicals

  • Organic chemicals

  • Light


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