Multiple choice

Match the column I with column II.

 
Column I
Column II
(a) Psychrophiles (i) grow optimum at around 60oC
(b) Psychrotrophs (ii) grow optimum at 80oC or higher (archaea)
(c) Mesophiles (iii) grow at 0oC, but optimum is about 15oC
(d) Thermophiles (iv) grow best at moderate around 37oC
(e) Hyperthermophiles (v) grow at 0oC also, but optimum is 20 - 30oC

  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

Correct answer. (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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