3. Why are some siblings similar in appearance or behavior and others different?

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

L'INTOSSICAZIONE DA BOTULISMO PUO VERIFICARSI A SEGUITO DEL CONSUMO DI QUALI ALIMENTI? SOTT'ACETI ALIMENTI CONSERVATI SOTTO SALE CONSERVE SOTT'OLIO

Calculate the cfu/cm \( \mathrm{cm}^{2} \) for a tested surface of 4 cm in length and 3 cm in width if the number of colonies on the agar plate is 96 cfu. (A) \( 8 \mathrm{cfu} / \mathrm{cm}^{2} \) (B) \( 12 \mathrm{cmu} / \mathrm{cm}^{2} \). (C) \( 72 \mathrm{cmu} / \mathrm{cm}^{2} \) (D) \( 128 \mathrm{cmu} / \mathrm{cm}^{2} \)

(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