Multiple Choice Questions

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Which one of the following matching pairs is incorrect?

  • Mollusca - Pseudocoel

  • Cnidaria - Nematocyst

  • Annelida - Chloragogen cells

  • Echinodermata - Water vascular system 


A.

Mollusca - Pseudocoel

Molluscs are coelomate animals. In such animals, body cavity is lined by mesoderm. Whereas, in some animals body cavity is not lined by mesoderm, instead, the mesoderm is persent as scattered pouches in between the ectoderm and endoderm. Such animals are called pseudocoelomates, e.g. Aschelminthes.


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The hormone that stimulates the release of pancreatic juice is

  • secretin

  • glucagon

  • inhibin

  • insulin


Necrosis (die-back) ofthe tip of young leaves is caused due to the deficiency of

  • iron

  • manganese

  • zinc

  • copper


Guttation is a process of loss of water in

  • liquid form containing dissolved minerals

  • liquid form without dissolved minerals

  • vapour form with minerals

  • vapour form without minerals


Which one of the following enzymes is responsible for the conversion of norepinephrine to epinephrine?

  • Catecholamine-O-methyltransferase

  • Phenylalanine-N-methyltransferase

  • DOPA decarboxylase

  • Monoamine oxidase


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Nitrogenase enzyme is a

  • magnesium-iron protein

  • molybdenum-iron protein

  • iron-copper protein

  • nickel-iron protein


Medullary rays are tissues made up of

  • phloem parenchyma

  • xylem parenchyma

  • sieve tube

  • sclerenchyma


Which one of the following group of animals is homeothermic?

  • Reptiles

  • Amphibians

  • Birds

  • Fishes


Which one of the following matching pairs is incorrect?

  • Shell fish - Pisces

  • Silver fish - Arthropoda

  • Cuttle fish - Mollusca

  • Star fish - Echinodermata


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An allosteric inhibitor of the enzyme acts by binding to the

  • substrate

  • product

  • catalytic site of the enzyme

  • non-catalytic site of the enzyme