Multiple choice

 
(a) Psychrophiles (i) grow optimum at around 60° C.
(b) Psychrotrophs (ii) grow optima of 80° C or higher (archaea).
(c) Mesophiles (iii) grow at 0° C but optimum is about 15° C.
(d) Thermophiles (iv) grow best at moderate around 37° C.
(e) Hyperthermophiles (v) grow at 0° C also but optimum is 20 - 30° C

On the basis of preferred temperature ranges, microbes are classified. Match the given coloums correctly.

  1. (a) - i, (b) - iv, (c) - v, (d) - ii, (e) - iii

  2. (a) - v, (b) - i, (c) - iv, (d) - iii, (e) - ii

  3. (a) - ii, (b) - iii, (c) - i, (d) - v, (e) - iv

  4. (a) - iv, (b) - ii, (c) - iii, (d) - i, (e) - ii

  5. (a) - iii, (b) - v, (c) - iv, (d) - i, (e) - ii
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

 
  (a) Psychrophiles (Cold Loving) can grow at 0° C, but optimum is about 15° C.  (b) Psychrotrophs can grow at 0° C also, but optimum is 20 - 30° C – important in food spoilage.  (c) Mesophiles(Moderate temperature loving) grow best at moderate around 37° C – many pathogens fall in this category.   (d) Thermophiles (Heat Loving) have a growth optimum at around 60° C.   (e) Hyperthermophiles have growth optima of 80° C or higher (archaea).

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