Paraffin wax is from Biology NEET Year 2009 Free Solved Previous

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

Agar- agar is obtained from

  • Chlorella

  • Spirogyra

  • Ulothrix

  • Gelidium


32.

Duramen is present in

  • inner region of secondary wood

  • part of sap wood

  • outer region of secondary wood

  • region of pericycle


33.

In plants, water supply is due to

  • osmosis

  • imbibition

  • guttation

  • adhesion force


34.

Most of the economically important fibre yielding plants belong to family

  • Malvaceae

  • Solanaceae

  • Cruciferae

  • Paceae


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35.

Paraffin wax is

  • ester

  • acid

  • monohydric alcohol

  • cholesterol


A.

ester

Waxes are esters formed between a long chain alcohol and saturated fatty acids. It is pliable and soft when warm but hard and water resistant when cold.

Steroids are complex compounds commonly found in cell membrane and animal hormone. Eg, Cholesterol, it reinforces the structure of cell membrane in animal cells.


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36.

In cell cycle, during which phase chromosomes are arranged in equatorial plate?

  • Metaphase

  • Anaphase

  • Telophase

  • Prophase


37.

Spindle fibre is made up of

  • tubulin

  • humulin

  • intermediate filament

  • flagelin


38.

Induction of flowering by low temperature treatment is

  • vernalization

  • cryobiology

  • photoperiodism

  • prunning


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39.

Edible part of mushroom is

  • basidiocarp

  • secondary mycelium

  • primary mycelium

  • tertiary mycelium


40.

Calyptra is derived from

  • archaegonia

  • capsule

  • antheridia

  • columella


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