Biotechnology

1. A lactic acid bacteria (13)
6. This is added to the thickened milk to make yogurt (7)
7. What is used to spread the microorganisms around the agar plate? (10, 4)
8. An advantage of microorganisms in food production is that they can be cultured ..... (8)
10. The process of which yeast is used to make bread rise (6)

2. This maximises the yield within a fermentation by killing any unwanted organisms that may compete with the ones being cultured (11)
3. 1 of the 4 phases in the standard growth curve where the population size is increasing quickly due to the conditions being at their most favourable (11)
4. What is happening to the population size when the curve is in the lag phase? (10, 6)
5. A aseptic technique (3, 4)
9. The substance that contains the enzyme chymosin, which clots milk (6)

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