Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

41.

Atactostele vascular bundles are

  • scattered in the ground tissue

  • three in number

  • in form of ting around

  • broken vascular bundles


42.

Chlorophyll- a is characterized by the side group

  • methyl

  • aldehyde

  • phytol

  • ketone


43.

Chloroplast has maximum quantity of .......... in stroma.

  • dehydrogenase

  • RuDP carboxylase

  • pyruvic carboxylase

  • hexokinase


44.

Photorespiration takes place in plants where carbon fixation occurs through

  • Calvin cycle

  • Hatch and Slack cycle

  • Glycolysis

  • Krebs' cycle


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45.

When an ovary develops into a fruit without fertilization it is called

  • porogamy

  • apospory

  • apogamy

  • parthenocarpy


D.

parthenocarpy

Parthenocarpicfruits are seedless and develop from ovary without fertilization.

Porogamy is the fertilization of a seed plant involving passage of the pollen tube into the ovule by the micropyle.

Apospory is the development of 2n gametophytes, without meiosis and spores, from vegetative, or non- reproductive, cells of the sporophyte.

Apogamy is the development of 1n sporophytes without gametes and syngamy from vegetative cells of the gametophyte.


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46.

Vivipary is shown by

  • Cocos

  • Squash

  • Rhizophora

  • All of the above


47.

GA usually promotes

  • sterility in flowers

  • maleness in flowers

  • femaleness in flowers

  • Both (b) and (c)


48.

Ethylene is

  • gaseous hormone

  • largest hormone

  • liquid hormone

  • solid hormone


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49.

Entamoeba gingivalis is causative agent of

  • pyorrhoea

  • amoebiasis

  • bronchitis

  • no disease but aggrevates pyorrhoea


50.

Post erythrocytic cycle of Plasmodium is also called

  • Ross cycle

  • Krebs' cycle

  • WBCs cycle

  • Golgi cycle


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