Multiple Choice Questions

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The net requirement of assimilatory power for the formation of 6 hexose molecules in maize plant is

  • 72 ATP, 48 NADPH

  • 90 ATP, 60 NADPH

  • 108 ATP, 72 NADPH

  • 180 ATP, 72 NADPH


D.

180 ATP, 72 NADPH

C4 plants (maize) require 30 ATP and 12 NADPH fpr synthesis of one hexose molecule. Therefore synthesis of six hexose molecules requires 180 ATP and 72 NADPH.


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Rauwolffia serpentina is used in

  • Curing high blood pressure

  • Kidney failure

  • Eye defect

  • Diabetes


 ‘Sun basket’ is

  • The device to utilize sun rays directly to meet the requirement of heat energy

  • The sufficient amount of sunlight stored in a cell

  • A device of taking a sunbath

  •  All of the above


Zero growth means

  • Natality balance mortality

  • Natality is more than mortality

  • Natality is less than mortality

  • Natality is zero


The following is the diagram of TS of another. Identify the parts labelled as A, B and C.

  • A-Connective, B-Endothecium, C-Pollen grain

  • A-Endothecium, B-Connective, C-Pollen grain

  • A-Pollen grain, B-Connective, C-Endothecium

  • A-Endothecium, B-Pollen grain, C-Connective


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In some organisms, karyokinesis is not followed by cytokinesis as a result of which, the multinucleate condition arises leading to the formation of the syncytium. The perfect example of this is

  • The appearance of a furrow in the cell membrane

  • Liquid endosperm in coconut

  • Sexual reproduction

  • Fertilization


The most recent and direct pre-historic ancestor is

  • Cro-magnon

  • Neanderthal

  • Pre-neaderthal

  • None of these


Tyloses an outgrowth from ray or axial parenchyma cell into the lumen of a vessel, which partially or completely blocks the cavity are present in

  • Periderm

  • Heart wood

  • Sap wood

  • Secondary cortex


Ethylene is related with

  • Aerobic respiration

  • Climacteric phenomenon

  • Anaerobic respiration

  • Fermentation


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Jacob and Monod name some enzymes as allosteric whose activity is regulated by

  • End product

  • Substrate

  • by product

  • Coenzyme