The paragraph below explains the structure of the chromosome in Fig. 1.1. Fill each gap with the most suitable term. The chromosome in Fig. 1.1 has two genetically identical ............................................. joined at a ............................................. . The chromosome consists of two DNA molecules, each wrapped around proteins called ............................................. proteins.
State one stage of mitosis at which the chromosome would look as it does in Fig. 1.1.
Suggest how ATP is used during the process of mitosis.
Prokaryotes divide by a process called binary fission. Fig. 1.2 shows some of the stages in binary fission. With reference to Fig. 1.2, identify two events that happen during binary fission but not during mitosis in human cells.