True or false on useful microbes

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Lactic acid bacteria turn milk into curd.

2. Statement is true

   No

   Statement

   Bread dough is fermented by bacteria.

3. Statement is true

   Yes

   Statement

   Penicillin comes from a mould.

4. Statement is true

   No

   Statement

   Fleming developed penicillin fully himself.

5. Statement is true

   Yes

   Statement

   Activated sludge settles after aeration.

6. Statement is true

   No

   Statement

   Biogas is mostly carbon dioxide.

Instructions

Decide whether each statement is true or false.

Explanation