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6 marksCell Structure and Functions

CAPE Biology Unit 1 · 2016 · Paper 2 · Question 4(a)(ii)

According to the endosymbiotic theory, organelles like mitochondria and chloroplasts are believed to have evolved from prokaryotes.

Discuss THREE lines of evidence in support of this theory.

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  1. 4(a)(i)Explain what is meant by the term 'endosymbiosis' and how it relates to the origin of these organelles in eukaryotes.[3 marks]
  2. 4(b)Enzymes are globular proteins and are highly specific in the reactions catalysed. Explain the basis of enzyme specificity and include in your explanation a…[6 marks]

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