Question

(a) Euglena are single-celled organisms that have features of both animal and plant cells.

Fig. 1.1 is a labelled diagram of a Euglena.

(i) The parts labelled in Fig. 1.1 are responsible for different characteristics of living organisms.

Identify the part responsible for:

(ii) State the name of one other characteristic of living organisms.

(iii) State one part from Fig. 1.1 that Euglena have in common with plant cells but not with animal cells.

(b) Euglena and animal cells do not have cell walls.
State the function of the cell wall.

(c) Cell walls are made from a type of carbohydrate called cellulose.
Cellulose is made up of smaller molecules of glucose.
(i) List the chemical elements in all carbohydrates.
(ii) Circle two other larger carbohydrate molecules made from glucose.
                       fat               glycerol             glycogen

                      oil                protein              starch