Biology 0610 · IGCSE · Biotechnology

Biotechnology — practice question

Yoghurt is made by adding the bacterium Lactobacillus bulgaricus to milk.
(a(i))[1]

State the genus name of these bacteria.

(a(ii))[2]

State two reasons why bacteria are useful in biotechnology processes such as making yoghurt.

(b(i))[2]

A person aims to consume 45 g of protein. They ate 200 g of yoghurt. Using the information in Fig. 6.1, calculate how much protein, in addition to the yoghurt, the person must eat to reach 45 g of protein.

(b(ii))[1]

State the role of fats in the diet.

(b(iii))[1]

State one principal source of dietary fibre.

(c(i))[2]

State the word equation for anaerobic respiration in yeast.

(c(ii))[1]

Describe the role of anaerobic respiration in yeast in bread-making.

(c(iii))[1]

State one additional use of yeast in biotechnology.

Worked solution & mark scheme

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