Multiple Choice Questions

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In the absence of light, what will increase?

  • Water uptake

  • Elongation of internodes

  • Uptake of mineral salts

  • Extension of leaf lamina


B.

Elongation of internodes

Etiolation is a process in flowering plants grown in the partial or complete absence of light. It includes elongation of stems and leaves, weakening of cell walls in stems and leaves, longer internodes hence fewer leaves per unit length of the stem, and chlorosis i.e. a pale yellowish-white color.


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Other than the nucleus which cellular organelle contains DNA?

  • Ribosome

  • Golgi complex

  • Mitochondria

  • Lysosome


Which type of centrum is found in the vertebra of mammals?

  • Amphiplaytan

  • Heterocoelous

  • Procoelous

  • Amphicoelous


A plant forms spores, have vascular system, but does not form flower and seed can be placed under

  • Algae

  • Bryophyta

  • Pteridophyta

  • Gymnosperm


Which one of the following are acoelomate animals?

  • Echinoderms

  • Annelids

  • Arthropods

  • Platyhelminthes


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Aqueous solution of SO2 is

  • acidic

  • basic

  • neutral

  • amphoteric


Which is the vestigial organ in a man?

  • Pinna muscles

  • Pinna

  • Ileum

  • Teeth


The enzyme responsible for reduction of molecular nitrogen to ammonia in leguminous plant is

  • Nitrite reductase 

  • Nitrate reductase

  • Nitrogenous

  • All of the above


Which of the following is not a protein?

  • Heparin

  • Keratin

  • Fibroin

  • Albumin


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Person taking rich diet of ascorbic acid will not suffer from

  • Rickets

  • Pellagra

  • Scurvy

  • Beri-beri