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Multiple Choice Questions

Pepsin is inactivated at pH

  • below 3

  • below 2

  • above 5

  • above 3


Mantle, foot and shell are the characteristics of

  • Nautilus

  • Echinus

  • Limulus

  • Euplectella


Secretion of gastric juice is stimulated by

  • pepsin

  • gastrin

  • renin

  • secretin


Moulting hormone is secreted by

  • corpora cardiacum

  • prothoracic gland

  • corpora allata

  • neurosecretory hormone


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Protists are

(i) unicellular and prokaryote

(ii) unicellular and eukaryote

(iii) multicellular and eukaryote

(iv) autotroph or heterotroph

  • (i), (ii) and (iii)

  • (ii), (iii) and (iv)

  • (iii), (iv)

  • (ii), (iv)


Nucleated RBC is present in

  • man

  • rat

  • frog

  • rabbit


Inner lining of blood vessels is formed by

  • ciliated epithelium

  • squamous epithelium

  • cubical epithelium

  • columnar epithelium


Which one shows bio-luminescence?

  • Noctiluca

  • Polystomella

  • Entamoeba

  • Suctoria


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Which one affects liver, muscle and adipose tissue?

  • Androgen

  • Insulin

  • Progesterone

  • Glucagon


The main excretory organ of prawn is

  • green gland

  • flame cell

  • Malphigian tubule

  • nephridia