Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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51.

During the G1- phase of cell division

  • RNA and proteins are synthesised

  • DNA and proteins are synthesised

  • cell prepares for M- phase

  • cell undergoes duplication


A.

RNA and proteins are synthesised

Cell division has two phases:

(a) Karyokinesis- Nucleus division.

It is further divided into-

   (i) Interphase is a resting phase and consists of G1, S and G2 phase.

Phase Activities
G1 RNA and protein synthsis takes place
S DNA replication takes place
G2 Damaged DNA is repaired and division of centrosomes takes place 

  (ii) M- phase represnts the phase of actual division

(b) Cytokinesis- Cytoplasm division.


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52.

The bioassay of auxin is

  • avena curvature test

  • callus formation

  • culture of fungus

  • seed dormancy


53.

Clinging roots are found in

  • orchids

  • Trapa

  • Podostemon

  • screwpine


54.

Water bloom is generally caused by

  • green algae

  • blue- green algae

  • bacteria

  • Hydrilla


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55.

The process which cannot take place in the absence of viruses is

  • transformation

  • conjugation

  • translocation

  • transduction


56.

Molybdenum causes

  • mottling

  • wilting

  • reclamation

  • chlorosis


57.

From which of the following plant is a medicine for respiratory disorders obtained?

  • Ephedra

  • Eucalyptus

  • Cannabis

  • Saccharum


58.

Decarboxylation is involved in

  • electron transport system

  • glycolysis

  • Kreb's cycle

  • lactic acid fermentation


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59.

Osmotic pressure of a solution is

  • greater than pure solvent

  • less than pure solvent

  • equal to pure solvent

  • less than or greater than pure solvent


60.

In Whittaker's system of classification, prokaryotes belong to the kingdom

  • Monera

  • Protista

  • Animalia

  • Fungi


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