Choose the most suitable answer. IMark Which of the following statements about bacteria are true? W Bacteria is an example of a microorganism. X Bacteria may be useful or harmful to man. Y Bacteria can be found everywhere around us. Z Bacteria can be seen with the microscope.

(A) (i) Describe TWO disadvantages of using Replicate Organism Detection And Counting (RODAC) plate during a surface swab. (ii) Explain TWO purposes of conducting a hand swab test. 12 m

34 (A) (i) Explain ONE purpose of air monitoring. (ii) Describe TWO factors that will affect air quality.

Glycerol a) Name the: (i) Process \( X \) (ii) Enzyme \( Y \) (iii) Molecule Z

(C) State TWO ways in which fermentation process helps to improve [2 marks] quality of food products.

8 Which of the following is a type of universal media? (A) MacConkey Agar. (B) Baird-Parker Agar. (C) \( \quad \) Mannitol Salt Agar. (D) Trypticase Soy Agar. 9