Class IX

Upon passing through tissues containing very less oxygen (O2),
  1. oxyhaemogloin releases its hemoglobin
  2. oxyhaemoglobin releases its oxygen
  3. oxyhaemoglobin shines with bright red color
  4. forms carboxyhaemoglobin
Binding of enzyme and substrate on active site is explained through
  1. hide and seek hypothesis
  2. lock and hide hypothesis
  3. lock and run hypothesis
  4. lock and key hypothesis
At a pH 7 to 9, activity of amylase
  1. stops
  2. slows
  3. expedites
  4. ends
Internal reflection of light is prevented through the
  1. sclerotic coat
  2. choroid coat
  3. iris
  4. pupil
Blood platelets are also called as
  1. lymphocytes
  2. phagocytes
  3. monocytes
  4. thrombocytes
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