Question

(a) Table 7.1 shows some information about five different enzymes.

(i) Identify the enzyme(s) from Table 7.1 that:
      • have the widest pH range of activity …………………….. and ……………………..
      • is active at pH 5.5 …………………………………………
      • is most active in alkaline conditions. …………………………………………
(ii) State one other factor, apart from pH, that affects the activity of enzymes.

(b)  Circle two words that are used to describe enzymes.
        carbohydrates               catalysts                  fats
        hormones                      proteins                   solvents
(c) The list shows some parts of the alimentary canal and associated organs.
       anus                     gall bladder                    mouth

      oesophagus       pancreas                          small intestine

      Choose words from the list to identify where each process occurs.
      Each word may be used once, more than once or not at all.
      mechanical digestion …………………………………………
      egestion …………………………………………
      ingestion …………………………………………

(d) Describe one similarity between absorption and assimilation.